Private video merger

Merge Videos Online

Combine multiple videos into one MP4 directly in your browser. Reorder clips, export locally, and keep files private.

Merge workspace

Add clips, arrange the order, and export one browser-friendly MP4.

Loading assembly engine...

Assembly settings

Clips

Total

0.00 MB

Preserve audio when possible

Turn this off if an export fails because a source has missing or incompatible audio.

How it works

1 Add two or more video clips from your device.
2 Reorder clips into the sequence you want.
3 Export a normalized MP4 that works in common players and upload forms.

FAQ

Is my video uploaded anywhere?

No. The assembly work runs in your browser with WebAssembly, so the selected files stay on your device.

Why can export take a while?

The browser needs to decode and re-encode the video locally. Keep this tab open until the export finishes.

Does the tool add a watermark?

No. The exported MP4 is watermark-free.

Do videos need the same size or codec?

No. The merge export re-encodes clips into a shared MP4 shape so mismatched sources can be combined.

What if audio fails during merge?

Some browser FFmpeg builds struggle with mixed or missing audio streams. Turn off audio preservation and export a silent version.

Want professional polish?

These browser tools are built for quick local assembly. Aufzeichna's desktop app is built for polished screen recordings with smooth cursor motion, cinematic zoom, and export control.

Check out the desktop app