Trim video without re-encoding
Fast trim cuts at the nearest keyframe and copies the original data — zero quality loss, seconds even on 2 GB files. Precise mode is frame-accurate and re-encodes only the trimmed edges.
- Fast trim: lossless packet copy, snaps to keyframes (~1–5s apart)
- Precise trim: frame-accurate smart-cut, edges re-encoded only
- No upload — files never leave your device
- No watermark, no size cap · 5 exports/day free
Frequently asked questions
What does "cuts at nearest keyframe" mean?
Video is stored as occasional full frames (keyframes) plus differences. A lossless cut can only start on a keyframe — typically every 1–5 seconds. Fast trim shows exactly where it will snap; if you need the exact frame, switch to Precise.
How is Precise trim different?
It re-encodes only the few frames between your chosen start and the next keyframe (and the tail), then copies everything in between untouched — frame-accurate, with 95%+ of the video still bit-identical. On tricky files (open GOPs, unusual encoders) it falls back to a full re-encode and tells you.
Will audio stay in sync?
Yes. Fast mode copies audio packets alongside video (~21 ms granularity, inaudible). Precise mode re-encodes the audio track cleanly across the cut so there is no pop or drift at the stitch.
Does the output play everywhere?
Output is standard MP4 (or WebM/MKV matching your source) that plays in QuickTime, Windows, VLC and browsers. Smart-cut output uses in-band parameter sets — a standard MP4 feature all mainstream players support.