Edit video

Beta

Join, trim and split clips. Export an MP4, All 4 sizes or a GIF with no watermark. Projects save in this browser, on your device.

Drop videos or choose files · MP4, MOV, WebM

Up to 10 minutes · 720p · no watermark

or Open your projects

Free · No sign-up · On a computer in Chrome, Edge, Firefox and Safari 26 or later

The video editor in a browser, with a city clip selected between two others on its timeline
Clips added to one timeline, with a concert clip dragged into the gap between the city and mountain clips

Join clips in any order

Add MP4, MOV or WebM clips and they line up on one timeline, up to 50 clips and 10 minutes in all. Drag a clip to a new spot, or use Move left and Move right. Working with a single clip? Resize video and Compress video are quicker.

A clip on the timeline with its start trimmed off and a split at the playhead, beside arrow keys and Undo

Trim, split and undo

Drag the edges of a clip to trim it, or nudge them with the arrow keys. Split at the playhead to cut a clip in two, then delete the part you don’t want. Undo and Redo go back 50 steps (Ctrl+Z, or Cmd+Z on a Mac). Cutting to fit a time limit? Check the platform video specs.

A finished 720p export with a green check, the video file it made, and a crossed-out cloud for no upload

Export a 720p MP4, no watermark

Pick a Shape, then frame each clip with Fit, Fill or Blur, and zoom, pan or rotate it. Export a 720p MP4 under a size limit, All 4 sizes in one zip, or a short GIF, with no watermark. Nothing is uploaded. Need a file for Discord? Set the size limit to match.

A laptop showing the editor’s timeline, next to a phone for the ClipSizer Android app

Built for a computer

The editor is made for a computer, with a keyboard and room for a timeline. It runs in Chrome, Edge, Firefox and Safari 26 or later. On a phone, the free video tools work in the browser, and the ClipSizer app for Android is on its way.

See what's coming

How it works

  1. Add your clips

    Choose MP4, MOV or WebM files from your computer. They’re read right there, never uploaded.

  2. Arrange and cut

    Drag the clips into order, trim their edges and split at the playhead. Pick a Shape and frame the clips, add a song and set the volume if you like. Undo anything you change.

  3. Export

    Press Export, choose a format and a size limit, and get an MP4 of up to 720p, All 4 sizes in one zip, or a GIF. No watermark.

Questions

Do you upload my videos?

No. Your clips are read and the video is made on your device, so nothing is uploaded and you don’t need an account.

Which browsers does it work in?

Chrome, Edge, Firefox and Safari 26 or later, on a computer. Older versions of Safari can’t run it.

How long can my video be?

Up to 10 minutes in total, made from up to 50 clips. You can add MP4, MOV and WebM files.

What do I get when I export?

An MP4 file with H.264 video and AAC sound, at up to 720p, kept under a size limit if you set one. You can also get All 4 sizes (9:16, 1:1, 4:5 and 16:9) in one zip for a project up to 5 minutes, or a looping GIF of one up to 15 seconds. There is no watermark.

Does it save my projects?

Yes, as you edit. Projects are kept in this browser on this device, never uploaded, and wait under Recent projects when you come back. Safari may clear projects you haven’t opened in a week. Delete projects and stored videos any time in Manage storage.

Can I add music?

Yes. Add one song from your own files, with a fade in and a fade out. You can set each clip’s volume too, and mute or replace the original sound.