{"id":14510,"date":"2026-09-24T10:31:33","date_gmt":"2026-09-24T10:31:33","guid":{"rendered":"https:\/\/playgama.com\/blog\/?p=14510"},"modified":"2026-09-24T10:31:33","modified_gmt":"2026-09-24T10:31:33","slug":"what-server-threading-and-coop-coep-headers-are-needed-for-g","status":"publish","type":"post","link":"https:\/\/playgama.com\/blog\/business-faqs\/what-server-threading-and-coop-coep-headers-are-needed-for-g\/","title":{"rendered":"What server threading and COOP\/COEP headers are needed for Godot web?"},"content":{"rendered":"

Threaded Godot web exports require two HTTP headers: Cross-Origin-Opener-Policy: same-origin and Cross-Origin-Embedder-Policy: require-corp. These response headers enable SharedArrayBuffer in the browser, which Godot needs for web worker threading. If your hosting provider cannot serve custom headers, disable threads in your export preset so the game runs everywhere.<\/strong><\/p>\n

At a glance<\/h2>\n\n\n\n\n\n\n\n
Fact<\/th>\nValue<\/th>\nSource<\/th>\n<\/tr>\n<\/thead>\n
Headers required for threaded Godot web builds<\/td>\nCOOP + COEP<\/td>\ndocs.godotengine.org<\/a><\/td>\n<\/tr>\n
What COOP\/COEP unlock in the browser<\/td>\nSharedArrayBuffer<\/td>\ndocs.godotengine.org<\/a><\/td>\n<\/tr>\n
If you cannot set headers on your host<\/td>\ndisable threads on export<\/td>\ndocs.godotengine.org<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A Godot web export that uses threads needs the server to send two headers on the page (and usually on the .wasm\/.pck files too): Cross-Origin-Opener-Policy: same-origin<\/code> and Cross-Origin-Embedder-Policy: require-corp<\/code>. These tell the browser it is safe to enable SharedArrayBuffer<\/code>, which Godot’s threaded web runtime relies on. Godot’s own docs on exporting for the web<\/a> cover this directly.<\/p>\n

If you’re wiring up ads, IAP or platform detection from GDScript, the Playgama Bridge SDK<\/a> plugin exists for Godot 3 and 4.<\/p>\n

If you don’t control the web server or are unable to add response headers – a common situation on aggregator portals and iframed hosting – export with threads disabled instead of trying to work around missing headers. A threadless build runs everywhere without any server configuration.<\/p>\n

Where to set the headers<\/h2>\n