What video formats can I trim?

You can trim MP4, MKV, MOV, AVI, WebM, and most other common video formats. The output is saved in the same format as the input.

How do I set the start and end times?

Play the video preview to find the exact moment you want, then click 'Set Start' or 'Set End' to capture the current playback position. You can also type times manually in seconds.

Is my video uploaded to a server?

No. All trimming is done inside your browser using FFmpeg.wasm. Your video file never leaves your device.

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✂️ Video Trimmer

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Upload Video

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Drop video file here

or tap / click to browse — MP4, MKV, MOV, AVI, WebM supported

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About This Tool

This tool uses FFmpeg.wasm — a WebAssembly port of FFmpeg — to trim your video entirely inside your browser. The output keeps the same format and quality as the original (stream copy, no re-encoding). Your file is never uploaded to any server.

🎬 MP4 · MKV · MOV · WebM

⚡ Stream copy — no re-encode

✓ Zero server transmission

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Frequently Asked Questions

Are my videos uploaded to a server?

No. All trimming is done using FFmpeg.wasm which runs entirely in your browser. Your video files never leave your device and are never transmitted to any server.

What formats are supported?

The trimmer supports MP4, MKV, MOV, AVI, WebM, and many more common video formats. FFmpeg.wasm handles a wide range of codecs and containers.

Will trimming reduce quality?

No. Stream copy mode is used when possible, which cuts the video without re-encoding. This preserves the original video and audio quality exactly, while also being much faster than re-encoding.