Is merging videos here free?
Yes. Joining video clips into one MP4 is completely free, with no signup or watermark.
Does it upload my videos?
No. The merge runs locally in your browser, so your clips stay on your device and are never uploaded to a server.
Can I reorder the clips?
Yes. The merge queue includes simple order controls so you can arrange clips before exporting.
Does it add transitions between clips?
No. This tool uses hard cuts only, joining each clip directly to the next for a fast, simple merge.
How are clips of different sizes handled?
All clips are normalized to the first video's canvas with contain padding on black, so the final MP4 keeps a consistent frame size.
How do I join several videos into one?
Add the clips in the order you want them to play and export. They are concatenated and re-encoded as a single video in your browser, with nothing uploaded.
What if the clips have different resolutions?
They have to be conformed at the join, which means scaling or padding, and the result rarely looks deliberate. Bring them to a common resolution before merging.
Why does the audio jump in volume between the clips?
Because the clips were recorded or mastered at different levels and merging does not normalize them. Match the levels first: a jump at the seam is very noticeable.
Does merging lose quality?
A pass, on every input, because everything is re-encoded. Merge once at the end from the best sources rather than joining files you already merged.
Should I trim the clips before or after merging?
Before. Cutting after the merge means re-encoding the entire joined file to remove a few seconds, which is slow and costs another pass of quality.