Ultraconvert
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100% client-side — your videos never leave your device

Trim videos,
without the upload.

Cut MP4, MOV, WebM and MKV down to the part you want — right in your browser. Drag the handles, preview, download.

How it works

  1. 1

    Drop your video

    Add an MP4, MOV, WebM or MKV file. It's decoded locally with WebCodecs — no upload.

  2. 2

    Set the in and out points

    Drag the start and end handles on the timeline, then preview your selection.

  3. 3

    Download the clip

    Export the trimmed video. Trimming copies the original streams when possible, so quality is preserved.

Frequently asked questions

Are my videos uploaded to a server?+

No. Trimming happens entirely in your browser via the WebCodecs API and mediabunny. Your files never leave your device.

Does trimming reduce quality?+

No. When the codec is compatible with the output container, the original video and audio streams are copied as-is, so there's no re-encoding and no quality loss.

Which formats can I trim?+

MP4, MOV (QuickTime), WebM and MKV. WebM files export as WebM; everything else exports as MP4.

Is it free?+

Yes — free, no signup, no watermarks.