Trim Video
Cut the start and end off a video without uploading it, with a fast lossless mode.
100% Client-SideAdd a video, choose the start and end points, then trim and download the clip.
How to use the Trim Video
- 1
Drop a video onto the upload area to preview it.
- 2
Drag the range handles, type exact times, or use the Playhead buttons while watching.
- 3
Use Play selection to check the cut.
- 4
Pick Fast (no re-encoding) or Frame-accurate (MP4) and click Trim video.
- 5
Preview the trimmed clip and download it.
Frequently asked questions
No. The video is processed on your device by ffmpeg compiled to WebAssembly. The only download is the engine itself (about 32 MB from a public CDN, once per visit); your file never leaves your browser.
Fast copies the original video and audio without re-encoding, so it is quick and lossless, but the cut can only start on a keyframe and may begin a little earlier than chosen. Frame-accurate re-encodes to H.264/AAC MP4 and cuts exactly where you set it, but takes longer.
Not in Fast mode — the streams are copied unchanged. Frame-accurate mode re-encodes at high quality (CRF 20), which is visually close to the original.
MP4, MOV, WebM, MKV, AVI and most other common formats. Fast mode keeps your original format; Frame-accurate mode always outputs MP4.
Files up to 1 GB are accepted, but everything runs in your browser's memory, so very large or long videos may be slow or fail on phones and older computers.
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Missing a feature or tool?
Tell us what would make Trim Video more useful, or what to build next.