Video Trimmer

Trim the start and end of a video without re-encoding when possible, keeping quality lossless and processing instant. Runs locally with FFmpeg WebAssembly.

100% free No uploads Runs in your browser No signup

Trim video

Drop a file to processProcessed by FFmpeg compiled to WebAssembly — entirely on your device

Start (seconds)

End (seconds)

Mode

Fast mode copies the stream without re-encoding — instant and lossless, but the cut points snap to keyframes (up to ~2s off). Precise mode re-encodes for exact frame boundaries.

How to use the Video Trimmer

1
Open the tool above — it is already running, no install or account needed.
2
Enter your input and adjust the options to match what you need.
3
Copy or download the result — everything was processed locally in your browser.

Private by design

This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.

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