Demo Editor

Free tool

Trim a video in your browser

Cut the slow start, the awkward ending, or anything in between. Drag a clip’s edges to trim it, then export an MP4. Free, no watermark, and the video stays on your computer.

Clipper
Media
Drop videos to start
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V1
A1
Space playB split under the mouse⌫ deleteCtrl+Z undo← → step a frame⇧Z fitDrag a clip to move it, its edges to trim. Hold Ctrl to stop snapping.

How to do it

  1. 1. Drop your video

    Drag an MP4, MOV or WebM onto the editor, or click to pick one. It lands on the V1 track.

  2. 2. Drag the edges

    Hover the clip: yellow handles show at its edges. Drag the left one to cut the start, the right one to cut the end. Edges snap to the playhead. To cut a piece out of the middle, press B at its start and end, click it and press ⌫.

  3. 3. Export

    Press Export and pick a size (up to 1080p). You get an H.264 MP4 that plays everywhere, with its sound.

The keys you already know

Hover a clip and press B to split it right under the mouse, ⌘B to split at the playhead, ⌫ to delete and ⌘Z to undo. Space plays, the arrow keys step a frame, ⌘J joins what you split. On Windows, Ctrl does what ⌘ does. On a phone, tap clips to select them and drag a selected one.

One picture, three sounds

V1 holds the picture and keeps its clips end to end, so deleting one closes the gap. Up to three audio tracks sit under it for the clips’ own sound, music and a voiceover, each placed wherever you like.

Clips for your next promo video

Select the clips you cut and press Add to library: each one is saved to your Demo Editor project with a note on how to use it, and the next video you make can use exactly that footage. It’s the one step that needs an account.

Your videos stay with you

Everything is decoded and encoded in your browser. The edit is kept in this browser too, so a reload brings it back. The export is an H.264 MP4 at up to 1080p that plays everywhere.