Trim Video Online — Free Video Cutter

Upload a video, set start and end times, and download the trimmed clip instantly.

How It Works

  1. 1Upload your file by dragging it into the drop zone or clicking to browse.
  2. 2Adjust the quality slider to balance file size and visual fidelity (optional).
  3. 3Click Download to save your converted file.

About Video Trimmer

Need to cut a section from a video? Upload your file, set the start and end times using the video player, and download just the clip you need — in the same format as the original. The trimming uses stream copy mode for near-instant processing without re-encoding, preserving original quality. Powered by FFmpeg.wasm running entirely in your browser.

Frequently Asked Questions

What video formats can I trim?

MP4, WebM, MOV, AVI, and MKV. The trimmed output uses the same format as your input.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

Is the video re-encoded when trimming?

No. The tool uses stream copy mode (-c copy) which copies the video and audio data without re-encoding. This is nearly instant and preserves original quality.

Why doesn't the trim start exactly where I set it?

Stream copy mode can only cut at keyframes. The actual start time may be slightly before your requested time. For frame-accurate trimming, re-encoding would be needed.

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