ToolsRiver Income Tax

Video Trimmer

  • Free, no sign-up
  • Runs in your browser
  • Works on mobile
Drop your video hereMP4, MOV, WebM or MKV · or click to choose a file

Your video stays on your device. It is processed inside your browser and is never uploaded to our server.

How it works. Choose a start and an end, and the tool saves just that part. Fast cut copies the video without re-encoding, so it takes seconds and loses no quality. Exact cut re-encodes so the cut lands on the exact frame.

How to trim a video

  1. Drop your video on the box above.
  2. Drag the two handles, or type exact start and end times such as 1:23.5.
  3. Use the nudge buttons to step the preview by 1 second or 0.1 second and find the right frame.
  4. Pick Fast cut or Exact cut, then press Trim video.
  5. Download the result.

Fast cut or exact cut?

Fast cutExact cut
SpeedSecondsSlower, depends on length
QualityUnchangedRe-encoded, small loss
Start pointMay start up to a second or two early, at the nearest keyframeExact to the frame
FormatSame as the originalMP4, WebM or same as original

If a file cannot be copied directly, the tool switches to exact cut on its own and tells you.

Tips

  • Use fast cut for long videos when a second of extra footage does not matter.
  • Use exact cut when the start must be clean, for example for a social clip.
  • Type times for precision, drag handles for speed.

Limits

The tool trims one continuous part. To remove a middle section, trim twice and join the parts in an editor. Exact cut on long, high-resolution video depends on your device and can run out of browser memory.

Privacy

Your video never leaves your device. The page loads the processing code once, then reads and writes the file inside your browser. There is no upload, no account and no watermark.

FAQ

Does trimming reduce quality?

Not with fast cut, because the video is copied as it is. Exact cut re-encodes, so there is a small loss.

Why does my fast cut start earlier than I chose?

Copying can only begin at a keyframe. Switch to exact cut for a frame-accurate start.

Can I trim audio too?

The sound is cut along with the video. For audio only, use Extract Audio from Video.

What formats work?

MP4, MOV, WebM and MKV that your browser can read.

Can I type the time?

Yes. Use seconds, mm:ss or hh:mm:ss, for example 1:23.5.

Is my video uploaded?

No. Everything runs in your browser.

About this tool. Built and tested by the ToolsRiver team, November 2026. We tested it in desktop Chrome with H.264 MP4 files in both modes, and checked that the saved length matched the selected range. It runs on Mediabunny by Vanilagy (Mozilla Public License 2.0), loaded from the jsDelivr CDN. Found a video it handles badly? Tell us on the Contact page. More video tools: Video Compressor, Video Cropper & Resizer, Video Converter.

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