Merge videos
Your files are processed on your device. We never upload them.
Video is read and written with Mediabunny, under the Mozilla Public License. Browsers without their own AAC encoder use FFmpeg's, under the GNU LGPL.
How to merge videos
- 01A ▸Choose the videos to join, or drop them on the page.
- 02A ▸Put them in order with the arrows.
- 03A ▸Select Join the videos, then download the result.
Questions
Why is joining sometimes instant?
Clips recorded on the same phone or camera with the same settings use the same format, size, and sound, so they can be copied one after another into one file without re-encoding. That takes seconds and loses nothing.
Are my videos uploaded?
No. Your files are processed on your device. We never upload them.
What happens when the clips differ?
They are re-encoded into one video the size of the first clip. Clips of a different shape are fitted inside it with black bars, and their sound is converted to match. This takes a good fraction of the videos' length on a computer, and longer on a phone.
Can I join videos of different formats, such as MOV and MP4?
Yes. Clips that can't be copied together are re-encoded into an MP4.
Is there a limit to how many clips I can join?
No fixed limit. The joined video is written in pieces, so it doesn't need to fit in memory, but your device needs room to store it.