Cut the clip.
Lose nothing.
Trim an MP4 or MOV by copying the original data — no re-encoding, no quality loss, done in seconds. The cut snaps to the nearest keyframe, and we show you exactly where it landed.
How do I trim a video without re-encoding? Add the MP4, set start and end (or use the playhead buttons), and press Trim. The clip is rebuilt from the original video/audio data — pixel-identical, no export wait. Nothing is uploaded.
Video trimmer
Because the video data is copied rather than re-encoded, the cut starts at the nearest keyframe at or before your chosen time (usually within a second or two) — the tool tells you the exact start it used. Need a frame-exact cut or a smaller file? That's Compress video, which re-encodes.
How to trim a video (without re-encoding)
- Add the MP4 or MOV — it loads into the preview player.
- Set the range — type times, or play to a spot and press "Set start/end at playhead".
- Trim & download — the file rebuilds in seconds (it's a copy, not an export).
Why this beats "export" in an editor
Any tool that re-encodes a cut costs you twice: the wait (an export can take minutes) and a generation of quality loss (the video is compressed again). This trimmer does what a cutting tool should: it copies the original compressed frames and audio samples into a new file. The clip that comes out is byte-for-byte the same video data as the source — the industry calls it "stream copy". The one honest limitation is keyframes, explained above and shown in the status line after every trim.
When to use the re-encoding tool instead
- Frame-exact cuts where the first frame matters — Compress video can start precisely
- Smaller files — trimming barely shrinks a file (it only removes what you cut); compressing changes the bitrate itself
- Format changes — this tool outputs MP4; Video to MP3 extracts audio, Video to GIF makes loops
Good to know
Trimmed clips carry no new metadata — the output is a clean rebuild of the frames you kept, which is also handy for privacy. Everything runs locally: a 200 MB video is processed in your browser tab without a single byte uploaded, so it works on a plane and it works on files you'd rather not hand to a server.
How do I trim a video without losing quality?
This tool cuts MP4/MOV files by copying the original video and audio data — no re-encoding at all, so the trimmed clip is pixel-identical to the source. The trade-off: the cut snaps to the nearest keyframe before your chosen start, usually within a couple of seconds.
Why does my clip start a little before the time I picked?
Video is compressed in keyframe groups; a player can only start cleanly at a keyframe. The tool shows the actual start it used, which is the nearest keyframe at or before your chosen point. Re-encoding (the compress-video tool) can cut exactly, at the cost of quality and time.
Which formats work?
MP4, MOV, and M4V with H.264 or HEVC video — the same family the compress-video tool handles. The output is always MP4.
Is my video uploaded?
No. The file is demuxed and rebuilt in your browser tab; nothing is sent to a server.