uDocumentViewer
Edit.mp4 · .mov · .webm · .mkv

Trim a video online

100% localFiles never leave your device — no upload, no account, no tracking.
About Trim Video

Cut a video down to just the part you want. Scrub to a start and end point on the timeline and this video trimmer slices the clip with ffmpeg.wasm, keeping the original format — perfect for shortening a recording or grabbing one moment from a long take.

Trimming runs entirely in your browser with no upload and no signup, and it works offline. Your footage never leaves your device, so private recordings stay private.

How it works
  1. 01

    Add your video

    Drop an MP4, MOV, WebM, or MKV file onto the page or pick it from your device.

  2. 02

    Set start and end

    Scrub the timeline to mark where the clip should begin and end.

  3. 03

    Trim

    Click Trim to cut the clip locally with ffmpeg.wasm.

  4. 04

    Download

    Save the trimmed video in its original format.

Features
set start and endframe-accuratekeeps format
Frequently asked
How does the video trimmer work?
Scrub to a start and end point on the timeline and the trimmer slices the clip with ffmpeg.wasm, keeping the original format.
Is my video uploaded to trim it?
No. Trimming runs entirely in your browser — files never leave your device, no upload, no signup, works offline.
Does trimming re-encode the video?
The clip is cut locally with ffmpeg.wasm; the kept segment is written out in the same format.
Related tools
Open these files in a viewer