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<title>KoalaSync | Netflix、YouTube、あらゆる動画を友達と同期視聴</title>
<meta name="description" content="Netflix、YouTube、Twitch、およびあらゆるHTML5動画を友達と完全に同期して視聴。ChromeおよびFirefox用の無料のオープンソースブラウザ拡張機能。登録不要。">
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<meta property="og:title" content="KoalaSync | Netflix、Emby、Jellyfin、ほぼすべての動画を友達と同期">
<meta property="og:description" content="Netflix、Emby、Jellyfin、YouTube、Twitch、ほぼすべてのHTML5動画を完全に同期して視聴。ChromeおよびFirefox用のプライバシー優先のオープンソースブラウザ拡張機能。">
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<meta name="twitter:description" content="Netflix、Emby、Jellyfin、YouTube、Twitch、ほぼすべてのHTML5動画を友達と完全に同期して視聴。ChromeおよびFirefox用のプライバシー優先のオープンソースブラウザ拡張機能。">
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{
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"@type": "Organization",
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"url": "https://sync.koalastuff.net/",
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<script type="application/ld+json" id="schema-software">
{
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"@type": "SoftwareApplication",
"name": "KoalaSync",
"operatingSystem": "Windows, macOS, Linux, ChromeOS",
"applicationCategory": "BrowserApplication",
"browserRequirements": "Google Chrome, Mozilla Firefox, Microsoft Edge, Opera, Brave",
"offers": {
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"price": "0",
"priceCurrency": "EUR"
},
"description": "Watch Netflix, YouTube, Twitch, Jellyfin, Emby and almost any HTML5 video in perfect sync with friends. Open source, privacy-first, free.",
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<script type="application/ld+json" id="schema-howto">
{
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"@type": "HowTo",
"name": "KoalaSyncを使用して友達とビデオを同期視聴する方法",
"description": "YouTube、Netflix、Twitchなどで、友達と完全に同期してあらゆる動画を視聴。登録不要、追跡なし。",
"step": [
{
"@type": "HowToStep",
"position": 1,
"name": "ブラウザ拡張機能をインストールする",
"text": "Chrome ウェブストアまたは Firefox Add-ons から KoalaSync をブラウザに追加します。ビデオ要素がある任意のウェブサイトで動作します。",
"url": "https://sync.koalastuff.net/#how-it-works"
},
{
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"position": 2,
"name": "ルームを作成する",
"text": "拡張機能のポップアップを開き、「新規ルーム作成」をクリックします。招待リンクは自動的にクリップボードにコピーされます。",
"url": "https://sync.koalastuff.net/#how-it-works"
},
{
"@type": "HowToStep",
"position": 3,
"name": "共有して同期する",
"text": "招待リンクを友達に送信します。ビデオのタブを選択して、リアルタイムで同期された再生を楽しんでください。",
"url": "https://sync.koalastuff.net/#how-it-works"
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<script type="application/ld+json" id="schema-faq">
{
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{
"@type": "Question",
"name": "友達と一緒にNetflix、Emby、Jellyfinを同期視聴できますか?",
"acceptedAnswer": { "@type": "Answer", "text": "はい!KoalaSyncはNetflix, YouTube, TwitchおよびHTML5ビデオプレーヤーを備えたあらゆるウェブサイト(Emby, Jellyfin, 独自のメディアサーバーを含む)で動作します。拡張機能をインストールし、ルームを作成して招待リンクを共有するだけで、全員で完全に同期して視聴できます。" }
},
{
"@type": "Question",
"name": "KoalaSyncはTelepartyの無料の代替ツールですか?",
"acceptedAnswer": { "@type": "Answer", "text": "MITライセンスのもとで100%無料かつオープンソース。有料プラン、制限された機能、広告などは一切ありません。Telepartyとは異 nel、KoalaSyncのリレーサーバーはメモリ上のみで動作し、データ収集やユーザーアカウント作成は不要です。" }
},
{
"@type": "Question",
"name": "KoalaSyncはEmby、Jellyfin、およびセルフホストのメディアサーバーで動作しますか?",
"acceptedAnswer": { "@type": "Answer", "text": "はい。KoalaSyncは標準的なHTML5ビデオ要素を検出するため、Emby, Jellyfin, Plex、および独自のセルフホスト配信設定で完全に動作します。また、データの完全な所有権を維持するために、Dockerを介してリレーサーバーをセルフホストすることも可能です。" }
},
{
"@type": "Question",
"name": "どのブラウザとプラットフォームがKoalaSyncをサポートしていますか?",
"acceptedAnswer": { "@type": "Answer", "text": "Google Chrome、Mozilla Firefox、Microsoft Edge、Opera、Brave、およびすべてのChromiumベースのブラウザ。Chrome ウェブストアまたは Firefox Add-ons から直接インストールできます。手動の設定は不要です。" }
},
{
"@type": "Question",
"name": "友達も全員拡張機能をインストールする必要がありますか?",
"acceptedAnswer": { "@type": "Answer", "text": "はい、参加者全員にKoalaSyncがインストールされている必要があります。ただし、登録やアカウント作成は不要です。招待リンクをクリックし、未インストールの場合は拡張機能をインストールすれば、数秒で自動的にルームに参加できます。" }
},
{
"@type": "Question",
"name": "データは安全ですか? 公式サーバーを信頼できない場合は?",
"acceptedAnswer": { "@type": "Answer", "text": "完全に安全です。KoalaSyncのリレーサーバーはメモリ上のみで動作するため、ルームを退出した瞬間にすべてのセッションデータが永久に削除されます。データベース、ログ、分析、アカウントは一切ありません。さらに、完全に管理したい場合は、Dockerを介して独自のプライベートリレーサーバーを数分でセルフホストできます。コードベース全体がオープンソースであり、GitHubで監査可能です。" }
}
]
}
</script>
</head>
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<span>KoalaSync</span>
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<span>Installed</span>
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<div class="nav-links" id="primary-nav" role="navigation" aria-label="Primary">
<a href="#features"><span>機能</span></a>
<a href="#how-it-works"><span>仕組み</span></a>
<a href="https://github.com/Shik3i/KoalaSync" target="_blank" style="display: inline-flex; align-items: center; gap: 6px;">
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GitHub
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<option value="en" >🇬🇧 English</option>
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<option value="fr" >🇫🇷 Français</option>
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<option value="pt-BR" >🇧🇷 Português (Brasil)</option>
<option value="ru" >🇷🇺 Русский</option>
<option value="it" >🇮🇹 Italiano</option>
<option value="pl" >🇵🇱 Polski</option>
<option value="tr" >🇹🇷 Türkçe</option>
<option value="nl" >🇳🇱 Nederlands</option>
<option value="ja" selected>🇯🇵 日本語</option>
<option value="ko" >🇰🇷 한국어</option>
<option value="pt" >🇵🇹 Português (Portugal)</option>
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<header class="hero" id="main-content">
<div class="container hero-grid">
<div class="hero-text">
<a href="https://github.com/Shik3i/KoalaSync/blob/main/CHANGELOG.md" target="_blank" class="version-badge" data-reveal style="text-decoration: none; display: inline-block; transition: transform 0.2s, box-shadow 0.2s;" title="View Changelog">
<span class="version-text-en" lang="en">v2.1.0 OUT NOW</span>
<span class="version-text-de" lang="de">v2.1.0 JETZT VERFÜGBAR</span>
</a>
<h1 data-reveal>一緒に観よう。<br>完璧に同期。</h1>
<p class="hero-subtitle" data-reveal>遅延のないリモート映画鑑賞。登録不要、データ収集なし。リンクを共有するだけで、一緒に視聴できます。</p>
<div class="hero-mascot-container" data-reveal>
<picture><source srcset="../assets/LookDownKoala-1x.avif 90w, ../assets/LookDownKoala.avif 205w" type="image/avif"><img src="../assets/LookDownKoala-1x.webp" srcset="../assets/LookDownKoala-1x.webp 90w, ../assets/LookDownKoala.webp 205w" sizes="90px" alt="ダウンロードボタンを見下ろしているかわいいコアラ" class="hero-lookdown-mascot" width="90" height="132" loading="eager" fetchpriority="high" decoding="async"></picture>
</div>
<div class="cta-group" data-reveal>
<a href="https://chromewebstore.google.com/detail/koalasync/obbnmkmlaaddodakcbdljknjpagklifc" class="btn btn-primary">
<img src="../assets/chrome.svg" alt="Chrome" width="20" height="20">
<span>Chromeに追加</span>
</a>
<a href="https://addons.mozilla.org/de/firefox/addon/koalasync/" class="btn btn-firefox">
<img src="../assets/firefox.svg" alt="Firefox" width="20" height="20">
<span>Firefoxに追加</span>
</a>
<a href="https://github.com/Shik3i/KoalaSync/releases" target="_blank" class="btn btn-secondary" style="display: inline-flex; align-items: center; gap: 8px;">
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GitHub Releases
</a>
</div>
</div>
<!-- Interactive CSS Extension Mockup -->
<div class="hero-mockup-wrapper" data-reveal>
<div class="extension-mockup">
<div class="mock-header-row">
<div class="mock-header-title"><picture><source srcset="../assets/NewLogoIcon.avif" type="image/avif"><img src="../assets/NewLogoIcon.webp" alt="KoalaSync Logo"></picture>KoalaSync</div>
<a href="https://github.com/Shik3i/KoalaSync" target="_blank" class="mock-version-link" title="Visit GitHub Repository">
<svg fill="currentColor" style="width:12px;height:12px;display:block" viewBox="0 0 16 16"><path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27s1.36.09 2 .27c1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.01 8.01 0 0 0 16 8c0-4.42-3.58-8-8-8"/></svg>
<span class="mockup-version">2.1.0</span>
</a>
</div>
<div class="mock-tabs">
<button class="mock-tab active" data-target="mock-room" title="Room settings and connection">Room</button>
<button class="mock-tab" data-target="mock-sync" title="Video sync controls and remote actions">Sync</button>
<button class="mock-tab" data-target="mock-settings" title="Extension preferences">Settings</button>
<button class="mock-tab" data-target="mock-dev" title="Advanced Diagnostics & Logs">Status</button>
</div>
<div class="mock-body">
<!-- ROOM TAB -->
<div id="mock-room" class="mock-screen active">
<div class="mock-joined-room" style="display: flex; justify-content: space-between; align-items: center; border-left: 4px solid var(--accent); padding: 8px 10px; background: var(--card); border-radius: 8px; margin-bottom: 12px;" title="The room you are currently connected to">
<div style="display: flex; flex-direction: column;">
<span style="font-size: 0.6rem; text-transform: uppercase; color: var(--text-muted); font-weight: 700; line-height: 1;">アクティブなルーム</span>
<span class="mock-room-name" style="font-weight: 700; color: var(--accent); font-size: 0.9rem; letter-spacing: 0.5px; margin-top: 2px;">brave-eagle-80</span>
</div>
<span class="mock-server-badge" style="font-size: 0.6rem; color: var(--text-muted);">公式サーバー</span>
</div>
<div class="mock-card">
<div class="mock-label" title="Share this link with friends so they can join">招待リンク</div>
<div class="mock-invite-box">
<input type="text" class="mock-input" value="https://sync.koalastuff.net/join#join:brave-eagle-80:pass" readonly style="flex: 1;" aria-label="Invite link">
<button class="mock-btn" style="width: 40px; padding: 0.45rem 0; flex-shrink: 0; background: #334155;" title="Copy Invite Link"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="13" height="13" x="9" y="9" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg></button>
</div>
</div>
<div class="mock-card" style="margin-bottom: 12px;">
<div class="mock-label" title="Other users currently connected to this room">ルーム内のメンバー</div>
<div class="mock-peer-list">
<div class="mock-peer-item">
<div class="mock-peer-header">
<span class="mock-peer-name">CoolUsername</span>
<span class="mock-peer-meta">YOU</span>
</div>
<div class="mock-peer-tab"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E1</div>
<div class="mock-peer-status"><span style="color:#22c55e;"></span> 0:55 • Playing</div>
</div>
<div class="mock-peer-item">
<div class="mock-peer-header">
<span class="mock-peer-name">KoalaPC</span>
<span class="mock-peer-meta">Peer</span>
</div>
<div class="mock-peer-tab"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E1</div>
<div class="mock-peer-status"><span style="color:#22c55e;"></span> 0:55 • Playing</div>
</div>
</div>
</div>
<button class="mock-btn" style="background:#ef4444; width:100%; border: none; padding: 10px; border-radius: 8px; color: white; font-weight: 700; cursor: pointer; border: 1px solid #ef4444;">ルームを退室</button>
</div>
<!-- SYNC TAB -->
<div id="mock-sync" class="mock-screen">
<div class="mock-form-group" style="margin-bottom: 12px;">
<label class="mock-section-label" title="Choose the browser tab containing the video to sync">
ビデオを選択
</label>
<select class="mock-input" style="width: 100%; box-sizing: border-box; background: var(--card); border: 1px solid #334155; color: white; padding: 8px; border-radius: 8px; font-family: inherit; font-size: 0.75rem; outline: none; cursor: default;">
<option><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E1</option>
</select>
</div>
<div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700;">
リモートコントロール
</label>
<button class="mock-btn" style="background:transparent; border: 1px solid #334155; border-radius: 6px; padding: 2px 6px; font-size: 0.65rem; cursor:default; opacity:0.8; color: var(--text-muted); display: flex; align-items: center; gap: 4px; white-space: nowrap;" title="Copy Invite Link">
<span><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="13" height="13" x="9" y="9" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg></span>
招待リンク
</button>
</div>
<div style="display: flex; gap: 8px; margin-bottom: 12px;">
<button class="mock-btn mock-btn-play" style="flex: 1; background: #22c55e; color: white; padding: 8px; border-radius: 8px; font-weight: 700; border: none; cursor: pointer;" title="Send a Play command to everyone"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" aria-hidden="true" viewBox="0 0 24 24"><path d="m5 3 14 9-14 9z"/></svg> Play</button>
<button class="mock-btn mock-btn-pause" style="flex: 1; background: #ef4444; color: white; padding: 8px; border-radius: 8px; font-weight: 700; border: none; cursor: pointer;" title="Send a Pause command to everyone"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" aria-hidden="true" viewBox="0 0 24 24"><path d="M6 4h4v16H6zm8 0h4v16h-4z"/></svg> Pause</button>
</div>
<div style="display: flex; gap: 8px; margin-bottom: 15px; align-items: stretch;">
<button class="mock-btn" style="background: linear-gradient(135deg, #6366f1, #a855f7); flex: 1; color: white; border: none; font-weight: 700; border-radius: 8px; padding: 8px; cursor: pointer;" title="Force all users to sync up">
<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><path d="M13 2 3 14h9l-1 8 10-12h-9z"/></svg> SYNC
</button>
<div class="mock-input" style="flex: 1; background: var(--card); border: 1px solid #334155; color: white; padding: 6px; border-radius: 8px; font-size: 0.75rem; display: flex; align-items: center; justify-content: space-between;" title="Choose sync target">
<span>
他の人に合わせる
</span>
<span style="font-size: 0.5rem; opacity: 0.6;"></span>
</div>
</div>
<label class="mock-section-label" title="Shows the most recent play, pause, or seek command">
最新のアクティビティ状況
</label>
<div class="mock-card" style="margin-bottom: 15px; display: flex; flex-direction: column; gap: 6px;">
<div style="display: flex; justify-content: space-between; align-items: baseline;">
<span style="font-weight: 700; color: #ef4444; font-size: 11px;">PAUSE</span>
<span style="font-size: 9px; color: var(--text-muted);">CoolUsername @ 12:44:32</span>
</div>
<div style="display: grid; grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); gap: 5px; margin-top: 4px;">
<div style="display: flex; flex-direction: column; align-items: center;">
<div style="width: 18px; height: 18px; border-radius: 50%; background: var(--success); color: white; display: flex; align-items: center; justify-content: center; font-size: 9px; font-weight: bold; margin-bottom: 1px;"><svg xmlns="http://www.w3.org/2000/svg" width="10" height="10" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="3" aria-hidden="true" viewBox="0 0 24 24"><path d="M20 6 9 17l-5-5"/></svg></div>
<span style="font-size: 7px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 36px;">🐨 KoalaPC</span>
</div>
</div>
</div>
<!-- Episode Auto-Sync Lobby Status Mockup -->
<div class="mock-card" style="margin-bottom: 15px; border-left: 4px solid #fbbf24; background: var(--card); padding: 8px 10px; border-radius: 8px;">
<div style="display:flex; align-items:center; gap: 6px; margin-bottom: 4px;">
<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" style="display:block;flex-shrink:0" viewBox="0 0 24 24"><path d="M5 22h14M5 2h14m-2 20v-4.172a2 2 0 0 0-.586-1.414L12 12l-4.414 4.414A2 2 0 0 0 7 17.828V22M7 2v4.172a2 2 0 0 0 .586 1.414L12 12l4.414-4.414A2 2 0 0 0 17 6.172V2"/></svg>
<span style="font-weight: 700; color: #fbbf24; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.05em;">Episode Lobby</span>
</div>
<div style="font-size: 0.7rem; color: white; margin-bottom: 4px; font-weight: 600;">
<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E2
</div>
<div style="font-size: 0.65rem; color: var(--text-muted); margin-bottom: 6px;">
1人のメンバー (KoalaPC) を待機中...
</div>
<button class="mock-btn" style="background: #334155; border: none; padding: 4px 8px; border-radius: 6px; color: white; font-weight: 600; font-size: 0.65rem; cursor: pointer; width: auto; display: block;" title="Cancel lobby and play anyway">
スキップして再生
</button>
</div>
<label class="mock-section-label" title="Other users currently connected to this room">
ルーム内のメンバー
</label>
<div class="mock-card" style="margin-bottom: 12px;">
<div class="mock-peer-list">
<div class="mock-peer-item">
<div class="mock-peer-header">
<span class="mock-peer-name">CoolUsername</span>
<span class="mock-peer-meta">YOU</span>
</div>
<div class="mock-peer-tab"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E1</div>
<div class="mock-peer-status"><span style="color:#22c55e;"></span> 0:55 • Playing</div>
</div>
<div class="mock-peer-item">
<div class="mock-peer-header">
<span class="mock-peer-name">KoalaPC</span>
<span class="mock-peer-meta">Peer</span>
</div>
<div class="mock-peer-tab"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg> Stranger Things - S4E1</div>
<div class="mock-peer-status"><span style="color:#22c55e;"></span> 0:55 • Playing</div>
</div>
</div>
</div>
</div>
<!-- SETTINGS TAB -->
<div id="mock-settings" class="mock-screen">
<div style="display: flex; align-items: center; justify-content: space-between; background: var(--card); padding: 8px 10px; border-radius: 8px; margin-bottom: 10px; border: 1px solid #334155;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700;" title="Username helps others identify you.">
ユーザー名
</label>
<input type="text" class="mock-input" value="CoolUsername" readonly style="width: 110px; padding: 4px; text-align: right; background: transparent; border: none; color: var(--accent); font-weight: 700;">
</div>
<div style="display: flex; align-items: center; justify-content: space-between; background: var(--card); padding: 8px 10px; border-radius: 8px; margin-bottom: 8px; border: 1px solid #334155;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; cursor: help;" title="Filters out non-video tabs and unrelated domains to keep the list clean">
不要なタブを非表示
</label>
<label class="mock-toggle-switch">
<input type="checkbox" checked>
<span class="mock-slider"></span>
</label>
</div>
<div style="display: flex; align-items: center; justify-content: space-between; background: var(--card); padding: 8px 10px; border-radius: 8px; margin-bottom: 8px; border: 1px solid #334155;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; cursor: help;" title="Pauses automatically and waits for all peers when an episode changes, then sync-starts together.">
次のエピソードを自動同期
</label>
<label class="mock-toggle-switch">
<input type="checkbox" checked>
<span class="mock-slider"></span>
</label>
</div>
<div style="display: flex; align-items: center; justify-content: space-between; background: var(--card); padding: 8px 10px; border-radius: 8px; margin-bottom: 8px; border: 1px solid #334155;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; cursor: help;" title="Automatically copies the invite link to your clipboard when creating a new room.">
招待リンク自動コピー
</label>
<label class="mock-toggle-switch">
<input type="checkbox" checked>
<span class="mock-slider"></span>
</label>
</div>
<div style="display: flex; align-items: center; justify-content: space-between; background: var(--card); padding: 8px 10px; border-radius: 8px; margin-bottom: 12px; border: 1px solid #334155;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; cursor: help;" title="Shows native system notifications when someone joins/leaves or plays/pauses.">
ブラウザ通知
</label>
<label class="mock-toggle-switch">
<input type="checkbox">
<span class="mock-slider"></span>
</label>
</div>
<div style="margin-top: 15px; padding-top: 8px; border-top: 1px solid #334155;">
<label class="mock-section-label" title="Tools for fixing connection issues">
トラブルシューティング
</label>
<button class="mock-btn" style="background:#334155; width:100%; border: none; padding: 10px; border-radius: 8px; color: white; font-weight: 600; cursor: pointer; font-size: 11px;" title="Regenerate your internal ID and reconnect">
ピアIDの再生成
</button>
<p style="font-size: 9px; color: var(--text-muted); margin-top: 5px; text-align: center; margin-bottom: 0;">
「Duplicate Identity」(ID重複)エラーが表示される場合に使用します。
</p>
</div>
</div>
<!-- DEV TAB -->
<div id="mock-dev" class="mock-screen">
<label class="mock-section-label" title="Current WebSocket connection state">
接続状態
</label>
<div class="mock-card" style="display:flex; align-items:center; gap: 10px; margin-bottom: 12px;">
<span class="status-dot status-online" style="width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: #22c55e; box-shadow: 0 0 8px #22c55e;"></span>
<span style="flex:1; font-size: 0.75rem; font-weight: 600; color: white;">
Connected
</span>
<button class="mock-btn" style="width: auto; padding: 4px 8px; font-size: 0.65rem; border: none; background: #334155; color: white; border-radius: 6px; cursor: pointer;" title="Copy logs to clipboard for sharing">
ログをコピー
</button>
</div>
<label class="mock-section-label" title="Technical details about the currently selected video element">
ビデオデバッグ情報
</label>
<div class="mock-card" style="font-size: 0.65rem; font-family: monospace; color: var(--text-muted); line-height: 1.4; margin-bottom: 12px;">
<div>readyState: HAVE_ENOUGH_DATA</div>
<div>seekDelta: 0.05s</div>
<div>buffered: 300.2s</div>
<div>engineState: <span style="color:#22c55e; font-weight:700;">SYNCED</span></div>
</div>
<label class="mock-section-label" title="Chronological log of all sync commands in the room">
全アクション履歴
</label>
<div class="mock-card" style="font-size: 0.65rem; color: var(--text-muted); line-height: 1.4; margin-bottom: 12px; max-height: 100px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px;">
<div style="display: flex; justify-content: space-between; border-bottom: 1px solid #334155; padding-bottom: 4px;">
<span>CoolUsername: PAUSE</span>
<span style="opacity: 0.5;">0:55</span>
</div>
<div style="display: flex; justify-content: space-between; padding-top: 2px;">
<span>KoalaPC: PLAY</span>
<span style="opacity: 0.5;">0:00</span>
</div>
</div>
<div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px;">
<label style="margin: 0; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: 700;" title="Technical connection logs for debugging">
ログ(直近50件)
</label>
<button class="mock-btn" style="background:transparent; border:none; color:var(--accent); font-size:10px; cursor:default; padding: 0; font-weight: 700;" title="Clear log output">
消去
</button>
</div>
<div style="max-height: 120px; overflow-y: auto; font-size: 0.65rem; font-family: monospace; background: #000; padding: 8px 10px; border-radius: 8px; color: #ccc; line-height: 1.4;">
<div style="color:#22c55e;">[18:37:32] EVENT: PLAY -&gt; ACK</div>
<div>[18:37:32] FORCE_SYNC -&gt; 0.05s diff</div>
<div>[18:37:38] EVENT: PAUSE -&gt; BROADCAST</div>
<div style="color:var(--text-muted);">[18:37:42] content_heartbeat: active</div>
</div>
<div style="margin-top: 16px; text-align: center; border-top: 1px solid rgba(255,255,255,0.05); padding-top: 10px; flex-shrink: 0;">
<a href="https://github.com/Shik3i/KoalaSync" target="_blank" style="color: var(--text-muted); text-decoration: none; font-size: 10px; opacity: 0.6; display: block;">GitHub Repository</a>
<div style="color: var(--text-muted); font-size: 9px; opacity: 0.4; margin-top: 4px;" class="mockup-version">2.1.0</div>
</div>
</div>
</div>
</div>
</div>
</div>
</header>
<section class="compat-section">
<div class="container">
<picture><source srcset="../assets/PlatformJuggler_New-1x.avif 368w, ../assets/PlatformJuggler_New.avif 643w" type="image/avif"><img src="../assets/PlatformJuggler_New-1x.webp" srcset="../assets/PlatformJuggler_New-1x.webp 368w, ../assets/PlatformJuggler_New.webp 643w" sizes="(max-width: 768px) calc(100vw - 2rem), 368px" alt="A cute koala juggling multiple browser tabs showing streaming platforms" class="compat-mascot" width="300" height="233" loading="lazy" fetchpriority="low" data-reveal></picture>
<p class="compat-heading" data-reveal>
<span>お気に入りのプラットフォームで動作</span>
</p>
<div class="compat-row" data-reveal>
<div class="compat-logo">
<img src="../assets/netflix.svg" alt="Netflix" width="24" height="24">
<span>Netflix</span>
</div>
<div class="compat-logo">
<img src="../assets/youtube.svg" alt="YouTube" width="24" height="24">
<span>YouTube</span>
</div>
<div class="compat-logo">
<img src="../assets/twitch.svg" alt="Twitch" width="24" height="24">
<span>Twitch</span>
</div>
<div class="compat-logo">
<img src="../assets/primevideo.svg" alt="Prime Video" width="24" height="24">
<span>Prime Video</span>
</div>
<div class="compat-logo">
<img src="../assets/jellyfin.svg" alt="Jellyfin" width="24" height="24">
<span>Jellyfin</span>
</div>
<div class="compat-logo">
<img src="../assets/emby.svg" alt="Emby" width="24" height="24">
<span>Emby</span>
</div>
<div class="compat-logo compat-more">
<span class="compat-more-icon">+</span>
<span>その他多数</span>
<div class="compat-tooltip">
<span>ビデオ要素があるほぼすべてのサイトで動作します</span>
</div>
</div>
</div>
</div>
</section>
<section id="use-cases" class="use-cases-section">
<div class="container">
<h2 class="section-title" data-reveal style="text-align: center; font-size: 2.2rem; margin-bottom: 1rem;">
<span>あらゆるシーンに最適</span>
</h2>
<p class="section-subtitle" data-reveal style="text-align: center; color: var(--text-muted); margin-bottom: 3.5rem; max-width: 600px; margin-left: auto; margin-right: auto;">
<span>近くにいても遠くにいても、KoalaSyncはお気に入りのビデオを通じて人々を結びつけます。</span>
</p>
<div class="use-cases-grid">
<div class="use-case-card" data-reveal>
<picture><source srcset="../assets/PopcornFriends-1x.avif 272w, ../assets/PopcornFriends.avif 543w" type="image/avif"><img src="../assets/PopcornFriends-1x.webp" srcset="../assets/PopcornFriends-1x.webp 272w, ../assets/PopcornFriends.webp 543w" sizes="(max-width: 768px) calc(100vw - 2rem), 272px" alt="一緒に座ってポップコーンを分け合っている2匹のかわいいコアラ" class="use-case-image" width="272" height="150" loading="lazy" fetchpriority="low"></picture>
<h3>
<span>友達との映画鑑賞</span>
</h3>
<p>映画をリアルタイムで同期し、DiscordやZoomなどでおしゃべり。まるで同じ部屋に座っているかのような感覚です。</p>
</div>
<div class="use-case-card" data-reveal>
<picture><source srcset="../assets/RemoteProf-1x.avif 272w, ../assets/RemoteProf.avif 507w" type="image/avif"><img src="../assets/RemoteProf-1x.webp" srcset="../assets/RemoteProf-1x.webp 272w, ../assets/RemoteProf.webp 507w" sizes="(max-width: 768px) calc(100vw - 2rem), 272px" alt="画面を通じて2匹のリモート生徒コアラに講義をするコアラ教授" class="use-case-image" width="272" height="150" loading="lazy" fetchpriority="low"></picture>
<h3>
<span>リモート学習</span>
</h3>
<p>オンラインチュートリアル、講義、開発者向けトレーニング配信などをクラスメイトや同僚と一緒に分析。一時停止して、複雑なステップについて話し合えます。</p>
</div>
<div class="use-case-card" data-reveal>
<picture><source srcset="../assets/KoalaCupple_New-1x.avif 272w, ../assets/KoalaCupple_New.avif 579w" type="image/avif"><img src="../assets/KoalaCupple_New-1x.webp" srcset="../assets/KoalaCupple_New-1x.webp 272w, ../assets/KoalaCupple_New.webp 579w" sizes="(max-width: 768px) calc(100vw - 2rem), 272px" alt="離れた場所で一緒に見ているかわいいコアラのカップル。一方はPCの前に座り、もう一方はベッドでノートPCを持っていて、二人の間にはハートが飛んでいます" class="use-case-image" width="272" height="150" loading="lazy" fetchpriority="low"></picture>
<h3>
<span>遠距離恋愛</span>
</h3>
<p>距離を縮めてデートナイトを楽しみましょう。すべてのストーリー展開を体験し、同じジョックで笑い、感情的な瞬間をまったく同じミリ秒で共有します。</p>
</div>
</div>
</div>
</section>
<section id="features">
<div class="container">
<picture><source srcset="../assets/KoalaQuestions-1x.avif 250w, ../assets/KoalaQuestions.avif 355w" type="image/avif"><img src="../assets/KoalaQuestions-1x.webp" srcset="../assets/KoalaQuestions-1x.webp 250w, ../assets/KoalaQuestions.webp 355w" sizes="(max-width: 768px) calc(100vw - 2rem), 250px" alt="A cute koala with a question mark above its head wondering why to choose KoalaSync" class="features-questions-mascot" width="250" height="211" loading="lazy" fetchpriority="low" data-reveal></picture>
<h2 style="font-size: 2.5rem; text-align: center; margin-bottom: 1rem;">
<span>KoalaSyncを選ぶ理由</span>
</h2>
<p style="text-align: center; color: var(--text-muted); margin-bottom: 4rem;">
<span>信頼性の高い同期、プライバシー優先の設計、簡単なセットアップのために構築。</span>
</p>
<div class="features-grid">
<!-- Card 1: Full Control / Instant Sync (Bento Large) -->
<div class="feature-card bento-large" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><path d="M13 2 3 14h9l-1 8 10-12h-9z"/></svg>
</span>
<span>完全なコントロール / 即時同期</span>
</h3>
<p>一人が一時停止すれば、全員が一時停止。一人がシークすれば、全員が追従。2フェーズ同期プロトコルが、リアルタイムで全員の再生状況を連動させます。</p>
</div>
<!-- Card 2: Endless Binge-Watching (Bento Standard) -->
<div class="feature-card" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><rect width="20" height="20" x="2" y="2" rx="2.18" ry="2.18"/><path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5m10 0h5M17 7h5"/></svg>
</span>
<span>終わらない連続視聴</span>
</h3>
<p>同期した自動再生。KoalaSyncはエピソードの切り替えを自動検知し、全員が次の動画を読み込むまで再生を待機します。</p>
</div>
<!-- Card 3: Zero Accounts / Pure Privacy (Bento Standard) -->
<div class="feature-card" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10"/></svg>
</span>
<span>アカウント不要 / 純粋なプライバシー</span>
</h3>
<p>登録不要、追跡なし、履歴も残りません。サーバーは一時的なメモリ(RAM)上でのみ動作し、退出時にルームを完全に消去します。</p>
<div class="bento-visual-architecture" style="margin-top: 15px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,0.05); font-size: 0.7rem; font-family: monospace; display: flex; align-items: center; justify-content: space-between; color: var(--accent);">
<span>STATE: VOLATILE</span>
<span style="background: rgba(99, 102, 241, 0.15); padding: 2px 6px; border-radius: 4px; font-weight: 700; font-size: 0.6rem;">RAM-ONLY</span>
</div>
</div>
<!-- Card 4: Universal HTML5 Support (Bento Large) -->
<div class="feature-card bento-large" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="M2 12h20M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10"/></svg>
</span>
<span>ユニバーサルHTML5サポート</span>
</h3>
<p>YouTube、Twitch、Netflix、Jellyfin、Emby、およびHTML5ビデオ要素を含むほぼすべての標準的なWebページで動作します。独自のセルフホスト設定とも互換性があります。</p>
</div>
<!-- Card 5: Instant Invites / 1-Click Join (Bento Large) -->
<div class="feature-card bento-large" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"/><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"/></svg>
</span>
<span>インスタント招待 / 1クリック参加</span>
</h3>
<p>IPアドレスやパスワードをやり取りする必要はありません。生成された招待リンクを友達に共有するだけで、1クリックで自動的にルームに参加できます。</p>
</div>
<!-- Card 6: Self-Hostable & Docker-Ready (Bento Standard) -->
<div class="feature-card" data-reveal>
<h3>
<span class="feature-icon-svg">
<svg width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="bento-icon" viewBox="0 0 24 24"><path d="m4 17 6-6-6-6m8 14h8"/></svg>
</span>
<span>セルフホスト可能&Docker対応</span>
</h3>
<p>公式サーバーは無料で高速ですが、必要に応じて独自のサーバーを構築できます。Dockerを使用して、数秒でプライベートリレーサーバーを起動できます。</p>
</div>
</div>
</div>
</section>
<section id="comparison" class="comparison-section">
<div class="container">
<picture><source srcset="../assets/ProContraKoala-1x.avif 260w, ../assets/ProContraKoala.avif 423w" type="image/avif"><img src="../assets/ProContraKoala-1x.webp" srcset="../assets/ProContraKoala-1x.webp 260w, ../assets/ProContraKoala.webp 423w" sizes="(max-width: 768px) calc(100vw - 2rem), 260px" alt="A cute koala weighing options in both hands to compare KoalaSync vs Teleparty" class="comparison-mascot" width="260" height="184" loading="lazy" fetchpriority="low" data-reveal></picture>
<h2 class="section-title" data-reveal style="text-align: center; font-size: 2.2rem; margin-bottom: 1rem;">
<span>KoalaSync と Teleparty の比較</span>
</h2>
<p class="section-subtitle" data-reveal style="text-align: center; color: var(--text-muted); margin-bottom: 3.5rem; max-width: 600px; margin-left: auto; margin-right: auto;">
<span>オープンソース、広告なし、プライバシー優先が、一緒に動画を観る上でいかに優れているかをご覧ください。</span>
</p>
<div class="comparison-table-wrapper" data-reveal>
<table class="comparison-table">
<thead>
<tr>
<th><span>機能</span></th>
<th class="highlight">KoalaSync</th>
<th>Teleparty</th>
</tr>
</thead>
<tbody>
<tr>
<td class="feat-name">
<strong><span>費用 / ペイウォール</span></strong>
<span class="feat-desc"><span>プレミアムサブスクリプション、隠れた料金、またはロックされた機能。</span></span>
</td>
<td class="check highlight"><span>100% 無料</span></td>
<td class="cross">
<span>有料プラン / プレミアム機能の制限</span>
<a href="https://www.teleparty.com/premium" target="_blank" rel="noopener noreferrer" class="source-link" title="See Teleparty Premium Pricing"><sup>[1]</sup></a>
</td>
</tr>
<tr>
<td class="feat-name">
<strong><span>ライセンス / コードの監査性</span></strong>
<span class="feat-desc"><span>ソースコードが公開され、自由に監査できるかどうか。</span></span>
</td>
<td class="check highlight"><span>オープンソース (MIT)</span></td>
<td class="cross">
<span>プロプライエタリ</span>
<a href="https://www.teleparty.com/privacy" target="_blank" rel="noopener noreferrer" class="source-link" title="See Teleparty Privacy Policy"><sup>[2]</sup></a>
</td>
</tr>
<tr>
<td class="feat-name">
<strong><span>セルフホスト</span></strong>
<span class="feat-desc"><span>独自のプライベートリレーサーバーを展開する機能。</span></span>
</td>
<td class="check highlight"><span>可能(Docker対応)</span></td>
<td class="cross">
<span>不可</span>
<a href="https://www.teleparty.com/privacy" target="_blank" rel="noopener noreferrer" class="source-link" title="See Teleparty Privacy Policy"><sup>[2]</sup></a>
</td>
</tr>
<tr>
<td class="feat-name">
<strong><span>プライバシーと追跡</span></strong>
<span class="feat-desc"><span>登録の要件、追跡クッキー、およびアナリティクス。</span></span>
</td>
<td class="check highlight"><span>履歴ゼロ (メモリ上のみ)</span></td>
<td class="cross">
<span>Google アナリティクスとクッキー</span>
<a href="https://www.teleparty.com/privacy" target="_blank" rel="noopener noreferrer" class="source-link" title="See Teleparty Privacy Policy"><sup>[2]</sup></a>
</td>
</tr>
<tr>
<td class="feat-name">
<strong><span>対応サイト</span></strong>
<span class="feat-desc"><span>サポートされているWebサイトとプレーヤーの互換性。</span></span>
</td>
<td class="check highlight"><span>ほぼすべての HTML5 ビデオ</span><a href="#footnote-3" class="source-link" title="Technical Compatibility Details"><sup>[3]</sup></a></td>
<td class="cross">
<span>サポートされているサイトのみ</span>
<a href="https://www.teleparty.com/premium" target="_blank" rel="noopener noreferrer" class="source-link" title="See Teleparty Premium Platforms"><sup>[1]</sup></a>
</td>
</tr>
<tr>
<td class="feat-name">
<strong><span>ローカライズ / 翻訳</span></strong>
<span class="feat-desc"><span>利用可能なインターフェース言語と翻訳サポート。</span></span>
</td>
<td class="check highlight"><span>13の言語(今後も追加予定)</span></td>
<td class="cross">
<span>英語のみ</span>
</td>
</tr>
</tbody>
</table>
<div class="table-footnotes">
<p style="opacity: 0.55; font-size: 0.65rem; margin-bottom: 0.4rem; display: block;">
<span>比較時点: 2026年5月。</span>
</p>
<p>
<sup>[1]</sup>
<span>公式 Teleparty Premium の価格設定と対応ネットワークの詳細:</span>
<a href="https://www.teleparty.com/premium" target="_blank" rel="noopener noreferrer">teleparty.com/premium</a>
</p>
<p>
<sup>[2]</sup>
<span>Telepartyのプライバシーポリシーと追跡データの収集について:</span>
<a href="https://www.teleparty.com/privacy" target="_blank" rel="noopener noreferrer">teleparty.com/privacy</a>
</p>
<p id="footnote-3">
<sup>[3]</sup>
<span>標準的なHTML5ビデオタグへのスクリプトインジェクションを許可するウェブサイトで動作します。非常に厳格なコンテンツセキュリティポリシー(CSP)、DRMコピー保護、または高度に難読化されたプレーヤーラッパー(複雑なシャドウDOMなど)を持つウェブサイトでは、自動制御やインジェクションが制限される場合があります。</span>
</p>
</div>
</div>
</div>
</section>
<section id="how-it-works" style="background: rgba(255,255,255,0.02)">
<div class="container">
<h2 style="font-size: 2.5rem; text-align: center; margin-bottom: 4rem;">
<span>はじめに</span>
</h2>
<div class="steps">
<div class="step">
<div class="step-text" data-reveal>
<div class="step-num" aria-hidden="true">01</div>
<h3><span>拡張機能をインストール</span></h3>
<p>Chrome ウェブストアや Firefox Add-ons から KoalaSync をブラウザに追加するか、GitHub から最新の開発者向け ZIP をダウンロードしてください。</p>
</div>
<!-- Custom Step 1 Illustration -->
<div class="step-illustration-1" data-reveal>
<div class="illus-browser-container">
<div class="illus-browser-header">
<div class="illus-browser-dots">
<span class="illus-browser-dot"></span>
<span class="illus-browser-dot"></span>
<span class="illus-browser-dot"></span>
</div>
<div class="illus-browser-address-bar">
<span class="url-protocol">https://</span>sync.koalastuff.net
</div>
<div class="illus-browser-toolbar">
<div class="illus-extension-btn active">
<picture><source srcset="../assets/NewLogoIcon.avif" type="image/avif"><img src="../assets/NewLogoIcon.webp" alt="KoalaSync Extension" width="14" height="14"></picture>
</div>
</div>
</div>
<div class="illus-browser-content">
<div class="illus-store-card">
<div class="illus-store-card-header">
<picture><source srcset="../assets/NewLogoIcon.avif" type="image/avif"><img src="../assets/NewLogoIcon.webp" alt="KoalaSync Logo" class="illus-large-logo" width="30" height="30"></picture>
<div class="illus-store-info">
<div class="illus-store-title">KoalaSync</div>
<div class="illus-store-desc">
<span>プライバシー優先のビデオ同期ツール</span>
</div>
</div>
</div>
<div class="illus-store-buttons">
<div class="illus-store-btn chrome">
<img src="../assets/chrome.svg" alt="Chrome Logo" width="12" height="12">
<span>Chrome版をダウンロード</span>
</div>
<div class="illus-store-btn firefox">
<img src="../assets/firefox.svg" alt="Firefox Logo" width="12" height="12">
<span>Firefox版をダウンロード</span>
</div>
</div>
</div>
<!-- Floating Extension Success Popup -->
<div class="illus-extension-popup">
<div class="popup-title">
<picture><source srcset="../assets/NewLogoIcon.avif" type="image/avif"><img src="../assets/NewLogoIcon.webp" alt="KoalaSync Logo" width="12" height="12"></picture>
<span>KoalaSync</span>
</div>
<div class="popup-status">
<div class="status-badge-success">
<span class="status-check"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="3" aria-hidden="true" viewBox="0 0 24 24"><path d="M20 6 9 17l-5-5"/></svg></span>
<span>拡張機能はアクティブです</span>
</div>
</div>
<div class="popup-quick-start">
<span>一緒に観る準備は完了!</span>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="step">
<div class="step-text" data-reveal>
<div class="step-num" aria-hidden="true">02</div>
<h3><span>ルームを作成</span></h3>
<p>拡張機能のポップアップを開き、「+ 新規ルーム作成」をクリックします。KoalaSyncは自動的に安全なルームIDとパスワードを生成し、接続し、招待リンクをクリップボードにコピーします。</p>
</div>
<!-- Custom Step 2 Illustration -->
<div class="step-illustration-2" data-reveal>
<div class="illus-popup-card">
<div class="illus-popup-header">
<div class="illus-popup-brand">
<picture><source srcset="../assets/NewLogoIcon.avif" type="image/avif"><img src="../assets/NewLogoIcon.webp" alt="KoalaSync Logo" width="14" height="14"></picture>
<span>KoalaSync</span>
</div>
<div class="illus-popup-version mockup-version">2.1.0</div>
</div>
<div class="illus-popup-tabs">
<div class="illus-popup-tab active">
<span>ルーム</span>
</div>
<div class="illus-popup-tab">
<span>同期</span>
</div>
<div class="illus-popup-tab">
<span>設定</span>
</div>
</div>
<div class="illus-popup-body">
<div class="illus-popup-btn action-create-room">
<span>+ 新規ルーム作成</span>
<div class="illus-btn-shine"></div>
</div>
<div class="illus-collapsed-details">
<span class="details-arrow"></span>
<span>手動接続 / 詳細設定</span>
</div>
<div class="illus-floating-success">
<span class="success-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><rect width="13" height="13" x="9" y="9" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg></span>
<span>招待リンクをコピーしました!</span>
</div>
</div>
</div>
</div>
</div>
<div class="step">
<div class="step-text" data-reveal>
<div class="step-num" aria-hidden="true">03</div>
<h3><span>共有と同期</span></h3>
<p>招待リンクを友達に送信します。友達が参加したら、ビデオのタブを選択して、同期された再生を楽しんでください。</p>
</div>
<!-- Custom Step 3 Illustration -->
<div class="step-illustration-3" data-reveal>
<div class="illus-sync-theater">
<!-- Player A (KoalaPC) -->
<div class="illus-player-card player-a">
<div class="player-header">
<span class="player-user">🐨 KoalaPC</span>
<span class="player-badge active">PLAYING</span>
</div>
<div class="player-video-canvas">
<div class="player-play-pulse"></div>
<div class="player-video-overlay"></div>
</div>
<div class="player-controls">
<span class="control-btn"></span>
<div class="player-timeline">
<div class="timeline-fill"></div>
<div class="timeline-knob"></div>
</div>
<span class="control-time">42:15</span>
</div>
</div>
<!-- Glowing Sync Bridge -->
<div class="illus-sync-bridge">
<div class="sync-line">
<div class="sync-beam"></div>
</div>
<div class="sync-status-badge">
<span>同期中</span>
</div>
</div>
<!-- Player B (LaptopKoala) -->
<div class="illus-player-card player-b">
<div class="player-header">
<span class="player-user">💻 LaptopKoala</span>
<span class="player-badge active">PLAYING</span>
</div>
<div class="player-video-canvas">
<div class="player-play-pulse"></div>
<div class="player-video-overlay"></div>
</div>
<div class="player-controls">
<span class="control-btn"></span>
<div class="player-timeline">
<div class="timeline-fill"></div>
<div class="timeline-knob"></div>
</div>
<span class="control-time">42:15</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- Self Hosters Paradise Section -->
<section id="self-hosting" style="background: rgba(15, 23, 42, 0.4); border-top: 1px solid var(--glass-border); border-bottom: 1px solid var(--glass-border);">
<div class="container">
<h2 style="font-size: 2.5rem; text-align: center; margin-bottom: 1rem;">
<span>セルフホストする方向け</span>
</h2>
<p style="text-align: center; color: var(--text-muted); margin-bottom: 2rem; max-width: 650px; margin-left: auto; margin-right: auto;">
<span>公式サーバーを信頼しませんか?データの完全な所有権を維持しましょう。数分で独自のプライベートリレーサーバーを構築できます。</span>
</p>
<!-- Mascot Self-Hosting / Deploy Illustration -->
<div style="display: flex; justify-content: center; margin-bottom: 2.5rem;" data-reveal>
<picture><source srcset="../assets/KoalaDeploy-1x.avif 300w, ../assets/KoalaDeploy.avif 600w" type="image/avif"><img src="../assets/KoalaDeploy-1x.webp" srcset="../assets/KoalaDeploy-1x.webp 300w, ../assets/KoalaDeploy.webp 600w" sizes="(max-width: 768px) calc(100vw - 2rem), 300px" alt="セルフホスト用にDockerコンテナを展開している、ノートPCの前に座ったかわいいコアラ" class="selfhost-mascot" width="300" height="201" loading="lazy" fetchpriority="low"></picture>
</div>
<div class="terminal-container" data-reveal>
<div class="terminal-header">
<div class="terminal-dots">
<span class="terminal-dot red"></span>
<span class="terminal-dot yellow"></span>
<span class="terminal-dot green"></span>
</div>
<div class="terminal-tabs">
<button class="terminal-tab-btn active" data-tab="pane-docker">docker-compose.yml</button>
<button class="terminal-tab-btn" data-tab="pane-caddy-simple">Caddyfile (Simple)</button>
<button class="terminal-tab-btn" data-tab="pane-caddy-advanced">Caddyfile (Advanced)</button>
</div>
</div>
<div class="terminal-body">
<button class="terminal-copy-btn">
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</button>
<div id="pane-docker" class="terminal-pane active">
<pre><code><span class="t-key">services:</span>
<span class="t-key">koala-sync:</span>
<span class="t-key">image:</span> <span class="t-str">ghcr.io/shik3i/koalasync:latest</span>
<span class="t-key">container_name:</span> <span class="t-str">KoalaSync</span>
<span class="t-key">restart:</span> <span class="t-str">always</span>
<span class="t-comment"># Access internally by proxying to container port 3000</span>
<span class="t-key">environment:</span>
<span class="t-key">-</span> <span class="t-str">TZ=Europe/Berlin</span>
<span class="t-key">-</span> <span class="t-str">PORT=3000</span>
<span class="t-key">-</span> <span class="t-str">MIN_VERSION=1.0.0</span>
<span class="t-key">-</span> <span class="t-str">MAX_ROOMS=100</span>
<span class="t-key">-</span> <span class="t-str">MAX_PEERS_PER_ROOM=50</span>
<span class="t-key">pids_limit:</span> <span class="t-val">2048</span></code></pre>
<div style="margin-top: 1rem; font-size: 0.75rem; text-align: right; padding-right: 0.5rem;">
<a href="https://github.com/Shik3i/KoalaSync/pkgs/container/koalasync" target="_blank" style="color: var(--accent); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; font-weight: 600; transition: opacity 0.2s; opacity: 0.85;">
<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" viewBox="0 0 24 24"><path d="M16.5 9.4 7.55 4.24M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16"/><path d="M3.29 7 12 12l8.71-5M12 22V12"/></svg> <span>GitHub Packages上のすべてのイメージタグを表示</span>
</a>
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<div id="pane-caddy-simple" class="terminal-pane">
<pre><code><span class="t-key">sync.koalastuff.net</span> {
<span class="t-key">root</span> <span class="t-val">*</span> <span class="t-str">/var/www/koalasync/website/www</span>
<span class="t-key">encode</span> <span class="t-val">zstd gzip</span>
<span class="t-comment"># Clean URLs support (no .html required)</span>
<span class="t-key">try_files</span> <span class="t-val">{path} {path}.html {path}/</span>
<span class="t-key">file_server</span>
}
<span class="t-key">syncserver.koalastuff.net</span> {
<span class="t-key">reverse_proxy</span> <span class="t-val">localhost:3000</span>
}</code></pre>
</div>
<div id="pane-caddy-advanced" class="terminal-pane">
<pre><code><span class="t-key">(security_headers)</span> {
<span class="t-key">header</span> {
<span class="t-comment"># Enable HTTP Strict Transport Security (HSTS)</span>
Strict-Transport-Security <span class="t-str">"max-age=31536000; includeSubDomains; preload"</span>
<span class="t-comment"># Prevent clickjacking attacks (Sameorigin)</span>
X-Frame-Options <span class="t-str">"SAMEORIGIN"</span>
<span class="t-comment"># Prevent MIME-sniffing</span>
X-Content-Type-Options <span class="t-str">"nosniff"</span>
<span class="t-comment"># Enable browser XSS protection</span>
X-XSS-Protection <span class="t-str">"1; mode=block"</span>
<span class="t-comment"># Control referrer information</span>
Referrer-Policy <span class="t-str">"strict-origin-when-cross-origin"</span>
<span class="t-comment"># Hide Caddy server stamp signature</span>
<span class="t-key">-Server</span>
}
}
<span class="t-key">sync.koalastuff.net</span> {
<span class="t-key">encode</span> <span class="t-val">zstd gzip</span>
<span class="t-key">root</span> <span class="t-val">*</span> <span class="t-str">/var/www/koalasync/website/www</span>
<span class="t-comment"># Clean URLs: Resolves paths without .html in the URL</span>
<span class="t-key">try_files</span> <span class="t-val">{path} {path}.html {path}/</span>
<span class="t-key">file_server</span>
<span class="t-comment"># Static Caching for high performance</span>
<span class="t-key">@static</span> {
<span class="t-key">file</span>
<span class="t-key">path</span> <span class="t-str">*.ico *.css *.js *.png *.svg *.webp *.avif</span>
}
<span class="t-key">header</span> <span class="t-val">@static</span> Cache-Control <span class="t-str">"public, max-age=31536000, must-revalidate"</span>
<span class="t-comment"># Hardened Security & Permission Policies</span>
<span class="t-key">import</span> <span class="t-val">security_headers</span>
<span class="t-key">header</span> {
Content-Security-Policy <span class="t-str">"default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; connect-src 'self'; img-src 'self' data:; object-src 'none'; frame-ancestors 'none'; base-uri 'none'; form-action 'none';"</span>
Permissions-Policy <span class="t-str">"camera=(), microphone=(), geolocation=(), payment=(), usb=()"</span>
}
}
<span class="t-key">syncserver.koalastuff.net</span> {
<span class="t-key">import</span> <span class="t-val">security_headers</span>
<span class="t-key">encode</span> <span class="t-val">zstd gzip</span>
<span class="t-key">reverse_proxy</span> <span class="t-val">KoalaSync:3000</span>
}</code></pre>
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<h2 data-reveal style="font-size: 2.2rem; text-align: center; margin-bottom: 1rem;">
<span>よくある質問</span>
</h2>
<p data-reveal style="text-align: center; color: var(--text-muted); margin-bottom: 3rem; max-width: 600px; margin-left: auto; margin-right: auto;">
<span>完璧に同期して動画を一緒に楽しむために必要なすべての情報。</span>
</p>
<div class="faq-grid">
<details class="faq-item" data-reveal>
<summary><span>友達と一緒にNetflix、Emby、Jellyfinを同期視聴できますか?</span></summary>
<p><span>はい!KoalaSyncはNetflix, YouTube, TwitchおよびHTML5ビデオプレーヤーを備えたあらゆるウェブサイト(Emby, Jellyfin, 独自のメディアサーバーを含む)で動作します。拡張機能をインストールし、ルームを作成して招待リンクを共有するだけで、全員で完全に同期して視聴できます。</span></p>
</details>
<details class="faq-item" data-reveal>
<summary><span>KoalaSyncはTelepartyの無料の代替ツールですか?</span></summary>
<p><span>MITライセンスのもとで100%無料かつオープンソース。有料プラン、制限された機能、広告などは一切ありません。Telepartyとは異 nel、KoalaSyncのリレーサーバーはメモリ上のみで動作し、データ収集やユーザーアカウント作成は不要です。</span></p>
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<details class="faq-item" data-reveal>
<summary><span>KoalaSyncはEmby、Jellyfin、およびセルフホストのメディアサーバーで動作しますか?</span></summary>
<p><span>はい。KoalaSyncは標準的なHTML5ビデオ要素を検出するため、Emby, Jellyfin, Plex、および独自のセルフホスト配信設定で完全に動作します。また、データの完全な所有権を維持するために、Dockerを介してリレーサーバーをセルフホストすることも可能です。</span></p>
</details>
<details class="faq-item" data-reveal>
<summary><span>どのブラウザとプラットフォームがKoalaSyncをサポートしていますか?</span></summary>
<p><span>Google Chrome、Mozilla Firefox、Microsoft Edge、Opera、Brave、およびすべてのChromiumベースのブラウザ。Chrome ウェブストアまたは Firefox Add-ons から直接インストールできます。手動の設定は不要です。</span></p>
</details>
<details class="faq-item" data-reveal>
<summary><span>友達も全員拡張機能をインストールする必要がありますか?</span></summary>
<p><span>はい、参加者全員にKoalaSyncがインストールされている必要があります。ただし、登録やアカウント作成は不要です。招待リンクをクリックし、未インストールの場合は拡張機能をインストールすれば、数秒で自動的にルームに参加できます。</span></p>
</details>
<details class="faq-item" data-reveal>
<summary><span>データは安全ですか? 公式サーバーを信頼できない場合は?</span></summary>
<p><span>完全に安全です。KoalaSyncのリレーサーバーはメモリ上のみで動作するため、ルームを退出した瞬間にすべてのセッションデータが永久に削除されます。データベース、ログ、分析、アカウントは一切ありません。さらに、完全に管理したい場合は、Dockerを介して独自のプライベートリレーサーバーを数分でセルフホストできます。コードベース全体がオープンソースであり、GitHubで監査可能です。</span></p>
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<p data-reveal style="margin-bottom: 3rem; color: var(--text-muted); max-width: 650px; margin-left: auto; margin-right: auto; line-height: 1.6; font-size: 1.05rem;">
<span>KoalaSyncは100%オープンソースで、広告や追跡は一切ありません。GitHubでコードを監査するか、ブラウザ拡張機能を直接インストールしてください。</span>
</p>
<div class="cta-group" data-reveal style="justify-content: center; gap: 1rem; margin-bottom: 1rem;">
<a href="https://chromewebstore.google.com/detail/koalasync/obbnmkmlaaddodakcbdljknjpagklifc" class="btn btn-primary">
<img src="../assets/chrome.svg" alt="Chrome" width="20" height="20">
<span>Chromeに追加</span>
</a>
<a href="https://addons.mozilla.org/de/firefox/addon/koalasync/" class="btn btn-firefox">
<img src="../assets/firefox.svg" alt="Firefox" width="20" height="20">
<span>Firefoxに追加</span>
</a>
</div>
<a href="https://github.com/Shik3i/KoalaSync" target="_blank" data-reveal style="display: inline-block; text-decoration: none;">
<picture><source srcset="../assets/KoalaGithub-1x.avif 250w, ../assets/KoalaGithub.avif 454w" type="image/avif"><img src="../assets/KoalaGithub-1x.webp" srcset="../assets/KoalaGithub-1x.webp 250w, ../assets/KoalaGithub.webp 454w" sizes="(max-width: 768px) calc(100vw - 2rem), 250px" alt="GitHubのマスコット「Octocat」の隣で、GitHubのリポジトリページを持っているかわいいコアラ" class="cta-github-mascot" width="250" height="165" loading="lazy" fetchpriority="low"></picture>
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