Video Cutter
Cut a clip out of a video by setting a start and end time, with a fast stream-copy mode and a frame-accurate re-encode mode.
Convert with this tool
or choose a file from your device — it is processed in this tab and never uploaded
Accepted: MP4, MOV, MKV, WebM, AVI, M4V
Files stay on your device. There is no upload, no queue and no watermark, so a conversion works even with the network switched off after the page has loaded.
Supported formats & processing
| Accepted input | MP4, MOV, MKV, WebM, AVI, M4V |
|---|---|
| Produced output | MP4, WebM or MKV containing only the selected range |
| Processing | FFmpeg.wasm (video engine, downloaded on first use) |
| Upload required | No — the file is read locally and never transmitted |
How to use this tool
- Add the videoThe container type determines which output options make sense.
- Enter the start timeHH:MM:SS or plain seconds both work.
- Enter the end timeThe clip runs from start to end, not for a duration.
- Choose the modeStream copy is instant; re-encoding is frame-accurate.
- Convert and previewThe result card states which mode was used and the output size.
About this tool
Cutting video has a subtlety that catches people out: a stream copy is instant and lossless, but it can only start at a keyframe, so the clip may begin up to a few seconds early. Re-encoding is slower and loses a little quality, but the cut lands exactly where you asked.
This page offers both and explains the trade in the result card. Use stream copy when you are pulling a rough section out of a long recording, and re-encoding when the first frame has to be exact — for example when you are cutting a clip to a script or to music.
Features
- Fast stream-copy mode that does not re-encode at all
- Frame-accurate re-encode mode when the first frame matters
- Times accepted as HH:MM:SS or as plain seconds
- Output to MP4, WebM or MKV
- Clear note explaining keyframe alignment in stream-copy mode
- Instant preview of the clip before downloading
Frequently asked questions
Why does my clip start earlier than I asked?
Stream copy can only begin at a keyframe, and keyframes are typically every one to ten seconds. Switch to re-encoding mode for an exact start.
Which mode should I use?
Stream copy when speed and losslessness matter more than precision — for example pulling a rough section from a long recording. Re-encoding when the exact first frame matters.
Can I cut several clips from one video?
Run the tool once per clip. Each run reads the source independently, so the original is never modified.
Does cutting a video take as long as the whole video?
No. Stream copy is nearly instant, and re-encoding only processes the selected range, so a 30-second clip from an hour-long file is fast.