Free browser tool

Free WebM Trimmer

Trim a WebM in the browser. Mark the start and end, preview the cut, and download an MP4. Nothing is uploaded. For MP4 and MOV as well, use the video trimmer.

No upload
No sign-up
No watermark

Drop a video here or click to browse

MP4, MOV, WebM, AVI — trimming happens locally in your browser

How to trim a WebM

Drop the WebM

Chrome tab recordings and other .webm files open in the player. The file stays on your device.

Set the start and end

Drag the handles or type the times. Play the range before you export so the cut starts and ends on the right frame.

Download the MP4

The section you marked is saved as an MP4, which is easier to drop into an editor or a social upload.

Why people trim a WebM

Chrome tab recordings

A browser recording often arrives as WebM and runs long. Cut it down to the part you meant to keep.

A clip for a bug report

Send the few seconds where the bug happens instead of the whole session.

Before a GIF or a social cut

Shorten the WebM first, then convert or upload a file that is only as long as the point you are making.

An editor that wants MP4

The download is an MP4 of that section, so the next tool does not have to accept WebM.

Frequently Asked Questions

How do I trim a WebM?

Drop the WebM in, drag the start and end handles to the section you want, and preview it. Download the cut when the range is right. A browser recording from Chrome is a typical file for this.

Why is the download an MP4?

The trim is saved as an MP4 so it plays in more players, editors, and upload forms than a WebM does. The picture is copied when the WebM codecs fit that container, so a short cut finishes quickly.

Can I trim an MP4 or MOV here too?

Yes. This is the same trimmer. The Video Trimmer page is the general one for MP4, MOV, and WebM together.

Is the WebM uploaded?

No. FFmpeg runs in your browser. The file stays on your device.