Trim / Cut Video
Drag the timeline handles or type timestamps to cut a clip. Runs entirely in your browser.
Drop a video file or click to browse
About this tool
The Trim tool cuts a precise segment from your video by setting a start time and duration. It uses FFmpeg's stream-copy mode by default, meaning the video and audio tracks are not re-encoded — the output quality is identical to the source and processing is nearly instant.
Guide & tips
- Enter times as HH:MM:SS.mmm, MM:SS.mmm, or plain seconds (e.g. 90.5 for 1 minute 30.5 seconds).
- Stream copy (the default) is lossless and very fast. The output will have the same codec and quality as your source file.
- Because stream copy snaps to the nearest keyframe, the actual cut point may be up to a few seconds earlier than your start time. If exact frame-level accuracy is needed, enable re-encode mode.
- Leave the duration field blank or set it larger than the remaining video length to trim to the end of the file.
- For HLS or segmented files, use the Convert tool to remux to a single MP4 first, then trim.
Frequently asked questions
No, as long as stream copy mode is used (the default). The video bitstream is copied byte-for-byte — no decode or re-encode cycle happens. If you enable re-encode, quality is controlled by the CRF setting.
Stream copy mode snaps the cut to the nearest I-frame (keyframe) that precedes your start time. This is a limitation of the MP4/H.264 format. For frame-accurate cuts, enable re-encode mode at the cost of a slower export.
Yes, and that is the default. Stream copy preserves the original codec, resolution, and quality. Re-encode is only needed when you need frame-accurate cuts or want to change the output format at the same time.
There is no imposed limit. The only constraint is your device's available RAM, since the output is assembled in memory before download.