Trim a video
Cut a clip from any video with a scrubbing preview; no upload.
Runs on your device — never uploaded
How to trim a video
- Add a video
Drop an MP4, MOV, WebM or MKV file.
- Set in and out points
Scrub the preview and mark where the clip starts and ends.
- Export
Fast mode copies the streams without re-encoding; precise mode re-encodes for exact cuts.
Frequently asked questions
Is my video uploaded?
No. FFmpeg runs as WebAssembly inside your browser tab. Nothing leaves your device.
Why does the tool take a moment to start?
The FFmpeg engine (~30 MB) downloads once on first use and is then cached on your device for instant starts later.
What is the difference between fast and precise?
Fast cuts on keyframes without re-encoding, so it finishes in seconds but may be off by up to a second. Precise re-encodes the clip for frame-exact cuts.