How to merge videos
Add two or more local videos, arrange them by dragging or using the arrows, then select Merge & save. The result downloads to your device.
In your browser.
Merge videos.
Everything happens locally in your browser. (No uploads)
Drag and drop videos to merge here
MP4 · MOV · WebM · MKV Depends on codecs supported by your browser
Ready · You can keep working offline
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TimelineDrag handles to trim · Up to 20s
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Frame previews
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Merge videos, step by step
Fast merging when formats match
Compatible video and audio tracks join without re-encoding. Otherwise, the app converts clips to the first video’s dimensions, adds padding where needed and fills missing audio with silence.
Files stay on your device
Videos are processed in your browser. No account or server upload is needed. After the page has fully loaded, you can work offline until you close or refresh it.
Supported files and limits
Add up to 30 MP4, MOV, WebM or MKV files. Codec support varies by browser; recent Chrome or Edge is recommended. Output limits: up to 4 GB with supported desktop browser storage, 512 MB with desktop memory fallback, and 256 MB on mobile. Available storage may lower these limits.