🔗 Video Merger

Merge several video clips into one file in the order you add them. Fast copy mode works when all clips share the same codec and settings; re-encode mode joins clips that differ.

Runs entirely in your browser with FFmpeg.wasm. No upload, no account, no video stored anywhere, and no watermark added by this site.

📁 Drop videos here, or choose files

MP4, MOV, WebM and other common video files. Choose several files, in merge order. Files are processed in your browser only — nothing is uploaded.

Choose video

Re-encode all clips (use when clips differ)

Before you press Process: the video engine is about 32 MB and downloads only when you press Process — never on page load. Your video never leaves this device. No account, no artificial limit; speed depends on your device and browser.

How to use it

Choose two or more video files, in the order you want them joined.
If the clips came from different sources, tick Re-encode for compatibility.
Press Merge Videos.
Download the single merged MP4.

Supported formats and limitations

Your video never leaves your device. Processing runs in your browser with FFmpeg.wasm; there is no upload, no account and no server copy.
The video engine (about 32 MB) is downloaded only after you choose a file and press Process — never automatically when the page loads.
There is no artificial usage limit and no account. Real speed and maximum size depend on your device and browser: large or long videos are slower and may run out of browser memory. A warning is shown for very large files, but no file is hard-blocked for size alone.
Copy mode requires matching codecs, resolution and frame rate. A mismatch usually fails; that is a signal to retry with re-encode mode, not a bug to ignore.
Re-encode mode is slower and re-encodes every clip to H.264 and AAC.
Audio and video must both be present in a similar form across clips for a clean join; silent and spoken clips mixed together can drift.
No artificial usage limit: capacity depends on your device and browser. Large or long videos are slower and may run out of browser memory.

Frequently asked questions

Why did copy mode fail?

The clips probably use different codecs or settings. Re-encode mode normalises them and almost always succeeds.

Can I reorder clips?

Remove and re-add files in the order you want. The list order is the merge order.

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