Merge videos
Combine multiple video clips into one file. Drag and drop your clips, set the order, and merge. Everything stays on your device.
Drop your video clips here
or click to browse: MP4, MOV, AVI, WEBM, MKV
What this tool does
When you have multiple short clips and want them in a single timeline, this tool does it without any software install or server upload. Add your clips, drag them into the right order, and hit merge.
If all your clips share the same resolution, the tool first tries a fast stream-copy merge. This copies the raw video data without re-encoding, so it finishes in seconds. If the codecs, frame rates, or audio formats differ, it automatically falls back to a full re-encode using H.264 and AAC. You never see an error either way.
The merged output is always MP4 with the faststart flag set, so playback starts immediately when shared online.
Frequently Asked Questions
Does this upload my videos to a server?
No. All merging happens inside your browser using WebAssembly. Your files never leave your device.
Can I merge clips with different resolutions?
Yes. If your clips have different resolutions, they will be scaled and padded to match the first clip's resolution. If they already match, the merge is much faster because it can copy the video data directly without re-encoding.
Is there a file size limit?
Yes. The combined size of all clips must be under 500 MB, and you can add up to 20 clips at a time.
What format is the output?
The merged video is always saved as MP4 with H.264 video and AAC audio, which plays on virtually every device.
Last updated: 2026-07-25