Merge Videos Online into One File
Join two or more clips into a single MP4 without leaving your browser. Add your videos, set the order and download one file. Nothing gets uploaded.
- MP4
- MOV
- AVI
- VOB
- Runs in your browser
- 100% free
- Private
How to merge videos
Drop in your clips
Select every clip you want to join. You can mix MOV, AVI, VOB and MP4 files in the same batch.
Set the play order
The first clip in the list plays first. Drag clips around or use the arrow buttons until the sequence is right.
Get one MP4
Click Merge & convert to MP4, check the preview, then save the finished file.
Why people use Adapterry
Nothing is uploaded
Your videos are processed in your browser and never leave your device.
No account needed
Open the page and start. No email, no password.
No watermark
Your MP4 comes out clean, with no logo stamped on it.
Works offline
Once the page and video engine have loaded, you can keep working without an internet connection.
Supported formats
Add MOV, AVI, VOB or MP4 files, or a mix of them. You always get back one MP4 with H.264 video and AAC audio.
Joining clips that don't match
Videos from different sources often differ in size, frame rate or sound. Adapterry converts them to one shared format so they play back to back. The output takes the size of your first clip, up to 1920x1080, and clips with a different shape get black bars instead of being stretched.
Some clips have no sound at all, like screen recordings or muted phone videos. Adapterry adds silent audio to those clips so they can be joined with the ones that do have sound.
Questions and answers
Can I merge videos of different formats?
Yes. You can combine an iPhone MOV, an old AVI and an MP4 in one job. Adapterry converts them all to H.264 and AAC so they join into one MP4.
What happens if my clips have different resolutions?
The final video uses the first clip's resolution, capped at 1920x1080. Clips with a different shape are fitted with black bars, never stretched.
How many videos can I merge at once?
There is no set number. Your device's memory is the limit, so if you see a memory error, try fewer or shorter clips, or close other tabs.
Will merging lower the quality?
If all clips are H.264 with AAC and share the same settings, they are joined without re-encoding, so quality stays the same. Otherwise they are re-encoded at CRF 23, a setting that looks good for most home video.
Can I change the order after adding files?
Yes. Drag any clip to a new spot or use its up and down buttons before you click merge.