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Video Trimmer

Cut start/end segments from any video with fast stream-copy trimming in your browser (keyframe-aligned, no re-encode). Remove a 45-second cold open from a 10-minute upload — local FFmpeg work, unlimited saves.

Runs on FFmpeg

100% Local Browser Native

How to Use the Video Trimmer

1. Upload the video

MP4, MOV, or WebM of any length.

2. Set start and end

Drag markers or type timestamps for the kept segment.

3. Export the cut

Save the trimmed file (downloads are unlimited).

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Frequently Asked Questions

How do I cut the first 45 seconds?

Upload, set start to 0:45 and end to the video's end: a 10-minute video becomes 9:15 with streams copied untouched (-c:v copy -c:a copy, faststart). Trims snap to keyframes — if a cut lands off, nudge the start to a keyframe.

Will trimming reduce quality?

No — streams copy without re-encoding, so kept frames are bit-identical and export finishes in seconds. The tradeoff is keyframe granularity, not quality: cuts align to the nearest keyframe.

How long does trimming take?

Under a minute for most clips on a laptop — FFmpeg seeks to the cut point instead of reprocessing everything. Hour-long 4K files take a few minutes; keep the tab open.

Are my videos uploaded when trimming?

No — trimming runs locally in your browser with FFmpeg WASM. Only the final save touches the network — downloads are unlimited.

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Last updated October 2026