How to use Video trimmer
- 1
Open the video
Drop one MP4, MOV, WebM, MKV or AVI file of up to 500 MB and 10 minutes; a filmstrip of 12 frames appears under the player.
- 2
Mark start and end
Drag the handles, type exact times, or press I and O at the playhead. Arrow keys step one frame, Shift+arrow one second.
- 3
Keep one part or several
Switch on Keep several parts to cut a section out of the middle; the parts you keep are joined in order.
- 4
Choose Fast or Precise
Fast cuts without re-encoding; Precise re-encodes for frame-exact edges. Press Trim video and download name-trimmed.mp4.
Limits and Pro
One video at a time, up to 500 MB and 10 minutes, with any number of parts kept.
Pro trims videos of up to 4 GB and 10 hours. See Pro
About Video trimmer
Video trimmer keeps the parts of a video you select and throws away the rest, writing a file in the same container as the original (MP4, MOV, WebM, MKV or AVI; anything else becomes MP4). Fast mode copies the compressed video and audio as they are, so a trim takes seconds whatever the length and the quality is identical to the source. The catch is that a video can only start cleanly on a keyframe, which phones place every one to two seconds, so a fast cut may begin slightly before the point you marked. Precise mode decodes and re-encodes the selection, H.264 at high quality for MP4, so the first and last frames are exactly the ones you chose, at the cost of time and a tiny loss of quality.
With Keep several parts you can mark any number of ranges and the tool joins them into one file, which is how you remove an ad break, a fumbled sentence or a dull middle section. You can also strip the audio track entirely. Only the first video and audio stream are kept, so subtitles and extra language tracks are dropped.
Typical uses are trimming phone clips before sharing, cutting the intro off a screen recording, and pulling a highlight out of a long game capture. The tool doesn't crop the frame, add transitions or titles, or change the speed. If your browser can't play the format, a low-resolution preview is made first so you can still see what you are cutting.
Privacy
Cuts are made inside this browser tab, by mediabunny for single fast cuts and by ffmpeg.wasm in a Web Worker for precise and multi-part edits. The video is read from your disk and never uploaded. When ffmpeg is needed, its 31 MB core is fetched once from the jsDelivr CDN and cached; the request holds none of your footage.
Features
Lossless fast cut
Keeps the original quality and finishes in seconds by copying the streams.
Frame-exact precise mode
Re-encodes the selection so it starts and ends on the exact frames you chose.
Keep several parts
Remove sections from the middle; the parts you keep are joined in order.
Keyboard shortcuts
Space to play, I and O to set the edges, arrows to step frame by frame, L to loop.