MP4 video merger

Merge MP4 files into one finished video.

Join camera clips in the order you choose, trim away rough starts and stops, keep the source audio, and export one clean MP4—all from your browser.

First export free€9 afterNo subscription

  • Auto-sorted by recording time
  • Sound stays with every clip
  • Private by default

Three steps

How to combine MP4 videos online

  1. 01 — Upload

    Add the clips you want to join

    Choose up to 30 video files, with a combined size of up to 8 GB. You can mix MP4 with MOV, M4V, or WebM when a project has footage from more than one device.

  2. 02 — Arrange

    Put every clip in the right place

    Move clips up or down, open any clip to set trim points, and place short captions at the moments that need context. Colour controls let you correct brightness, contrast, or saturation without changing the original file on your device.

  3. 03 — Export

    Render one shareable MP4

    Pick 1080p, 1440p, or 4K. OneCut renders the ordered clips, their audio, trims, colour adjustments, and captions into one H.265 MP4.

Keep the order

A video joiner that still gives you control.

Basic file joiners often glue clips together and stop there. OneCut keeps the job simple while giving you the few edits that matter before export: order, trim points, captions, audio, and colour.

No subscription

Pay for finished videos, not another app plan.

Your first completed export is free. Later completed videos are €9 each, so an occasional project does not turn into another monthly bill.

MP4 merging FAQ

What to know before you export

Can I merge MP4 files with different resolutions?

Yes. Choose the resolution for the finished project—1080p, 1440p, or 4K—before starting the render.

Can I combine MP4 and MOV files together?

Yes. One project can contain MP4, MOV, M4V, and WebM clips. The finished download is an MP4.

Do I need to install a video editor?

No. The editor runs in the browser and the final video renders in OneCut's cloud service. There is also an open-source CLI for people who prefer a local command-line workflow.

Ready when you are

Turn the clips on your device into one finished MP4.

Your first completed export is free. Later exports are €9 each, with no subscription.

Merge my videos

Working with Apple camera files? Read how to combine iPhone videos.