Which browsers work with Cutroom AI?

Why WebCodecs matters

Cutroom AI edits your video inside the browser instead of uploading it. To do that, the browser has to decode your clips and encode the finished MP4 itself, and WebCodecs is the feature that allows it.

If your browser does not have it, the Projects page says “This browser can't edit video yet” and the import button stays off. Nothing breaks halfway through an edit.

WebGPU and speed

Speech recognition runs on your graphics card through WebGPU when the browser offers it. Without WebGPU it runs on the processor instead. Both work.

The first transcription downloads the speech model, so it needs a connection. After that the model is cached in the browser.

Exports lean on the browser's video encoder. If it has no encoder for the size you picked, such as 4K, the export says so and suggests 1080p or 720p.

Phones and tablets

The web editor works in a phone or tablet browser only if that browser supports WebCodecs. The same check applies: if the import button is available on the Projects page, the browser can edit. A phone app is in progress but not released.

Some file types also depend on the browser. Cutroom AI imports MP4, MOV, WebM and MKV video, and MP3, WAV, FLAC, AAC and OGG audio. AVI is not supported. If one clip uses a codec your browser cannot decode, the import tells you which one.