Intro outro assembly

Add Intro or Outro to Video

Attach an optional intro and outro clip to a main video, normalize the result, and export one MP4 locally.

Intro/outro workspace

Choose a main video, then add optional intro and outro clips around it.

Loading assembly engine...

Assembly settings

Selected

0/3

Main required

Missing

Preserve audio when possible

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

How it works

1 Add the main video that should stay in the middle.
2 Optionally add an intro before it and an outro after it.
3 Export a normalized MP4 that combines the selected clips in order.

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 I need both an intro and outro?

No. The main video is required, while intro and outro clips are optional.

What happens if clip sizes differ?

The browser export normalizes clips to the main video canvas before concatenating them.

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