Merge videos online
Join clips into a single MP4 without installing an editor. Drop the files in, put them in the right order, and FFmpeg stitches them together in your browser.
Your files never leave your browser
How to use
- 1
Drop two or more video files into the box.
- 2
Reorder them with the arrows until the sequence is right.
- 3
Merge and download the finished MP4.
FAQ
Are my videos uploaded?
No. FFmpeg runs as WebAssembly in your browser; nothing is sent anywhere.
Do the clips need matching formats?
No. Each clip is normalised to 1280×720 at 30 fps before joining, so mismatched sources still produce one clean file.
Why is the output 720p?
Merging different sources requires a common frame size, and 720p keeps the browser from running out of memory. For originals in a single format, trim and compress instead of merging.
How long does it take?
Roughly real time: joining three one-minute clips takes about three minutes on a laptop, longer on a phone.
Is there a size limit?
500 MB per file in the browser, and the total is bounded by your device memory.