diff --git a/apps/lightcraft-web/src/web.rs b/apps/lightcraft-web/src/web.rs
index 14a5d050b..2ca6d7105 100644
--- a/apps/lightcraft-web/src/web.rs
+++ b/apps/lightcraft-web/src/web.rs
@@ -23,7 +23,11 @@ use crate::store::{Originals, content_hash, download_name, storage_key};
 use crate::wire::ThumbIndex;
 use crate::workers::{THUMB_INDEX, Workers};
 
-const ACCEPT: &str = ".jpg,.jpeg,.png,.tif,.tiff,.webp,.dng,.cr2,.nef,.arw,.psd,.jxl,.gif,.bmp";
+/// The web picker's accept list, derived from the engine's import extensions (both
+/// cases) so no format the engine can import is silently filtered out of the dialog.
+fn accept_list() -> String {
+    lightcraft_engine::import::accept_list()
+}
 
 /// After a failed save, wait this long before trying again (ms).
 const SAVE_RETRY_MS: f64 = 2000.0;
@@ -123,7 +127,7 @@ fn open_picker(originals: Originals, backend: Option<Backend>, ctx: egui::Contex
     let Ok(input) = doc.create_element("input").map(|e| e.unchecked_into::<web_sys::HtmlInputElement>()) else { return };
     input.set_type("file");
     input.set_multiple(true);
-    input.set_accept(ACCEPT);
+    input.set_accept(&accept_list());
     let inp = input.clone();
     let on_change = Closure::<dyn FnMut()>::new(move || {
         if let Some(files) = inp.files() {
diff --git a/crates/engine/src/import.rs b/crates/engine/src/import.rs
index bc8c1c962..3134d4e98 100644
--- a/crates/engine/src/import.rs
+++ b/crates/engine/src/import.rs
@@ -374,6 +374,26 @@ pub fn is_supported(path: &Path) -> bool {
     path.extension().is_some_and(|e| EXTENSIONS.contains(&e.to_string_lossy().to_lowercase().as_str()))
 }
 
+/// The web file picker's accept list, derived from [`EXTENSIONS`]. Each extension
+/// is listed in both cases: browsers' `accept` matching is case-insensitive per
+/// spec, but some implementations (e.g. Windows/Edge) match case-sensitively and
+/// rejected uppercase `.NEF` files, so a lowercase-only list silently hid raws
+/// such as CR3, NRW, RAF, ORF, RW2, RWL, RAW, PEF and SRW from the picker.
+pub fn accept_list() -> String {
+    let mut out = String::new();
+    for &ext in EXTENSIONS {
+        if !out.is_empty() {
+            out.push(',');
+        }
+        out.push('.');
+        out.push_str(ext);
+        out.push(',');
+        out.push('.');
+        out.push_str(&ext.to_uppercase());
+    }
+    out
+}
+
 /// Expand files and folders (recursively) into supported files. `skip` (e.g. the library folder)
 /// is never descended into. Each folder's walk is bounded ([`crate::walk::Limits::default`]); a
 /// walk that stops at a bound is logged.
@@ -1607,6 +1627,15 @@ mod tests_known;
 mod prepared_tests {
     use super::*;
 
+    #[test]
+    fn accept_list_covers_every_extension_in_both_cases() {
+        let list = accept_list();
+        for &ext in EXTENSIONS {
+            assert!(list.contains(&format!(".{ext}")), "lowercase .{ext} missing from accept list");
+            assert!(list.contains(&format!(".{}", ext.to_uppercase())), "uppercase .{} missing from accept list", ext.to_uppercase());
+        }
+    }
+
     #[test]
     fn revalidate_add_only_converts_matching_ready_item() {
         let mut s = Session::new();