# Trim Video

Trim a video down to the part you want by typing a start and an end. Free, no signup, no watermark, and nothing is uploaded.

Canonical page: https://filetity.com/trim-video

## Capabilities

- Free: Yes, with no watermark and no page limit.
- Account required: No. There is no account system.
- Processed on device: Yes. The file is read by your browser and never uploaded. There is no server to send it to.
- Formats: MP4, MOV, WebM and MKV in, the same family out. Audio is kept and stays in step.
- Limits: One range at a time. Keeping two separate sections means running it twice, and there is no joining step here.
- Mobile: Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
- Offline: Yes, once the page has loaded. The tool keeps working with no network connection.

## Questions

### Why is trimming the end fast and trimming the start slow?

Because a video is only decodable from certain keyframes. Ending early means simply not writing the rest, so the packets are copied. Starting later means the first frame you asked for probably is not a keyframe, so the video has to be decoded from the nearest one and encoded again to make your chosen moment the beginning.

### Is the cut exactly where I typed?

Yes, to the frame. Tools that trim instantly from any point are snapping to the nearest keyframe instead, which is why the result sometimes starts a second early. This decodes and re-encodes when it has to, in exchange for landing where you asked.

### Does the audio stay in sync?

Yes. Both tracks are trimmed to the same range and written with matching timestamps. Drift usually comes from cutting the two tracks separately, which is not something that can happen here because there is one range.

### Can I cut a section out of the middle and join the ends?

Not in one pass. Trim twice to get the two pieces you want to keep, which this does well, and then join them in a video editor. Joining two re-encoded clips cleanly is a different problem from cutting one.

### How long will it take?

Roughly proportional to the length of what you keep, not the length of what you started with, because only the range you asked for is decoded. Ending early with no start trim is close to instant, since nothing is re-encoded at all.

## Related tools

- [Compress video](https://filetity.com/compress-video): Make a video smaller without uploading it anywhere.
- [Video to GIF](https://filetity.com/video-to-gif): Turn a few seconds of a video into a GIF, at a size you choose.