For the complete documentation index, see llms.txt or the full corpus at llms-full.txt.

Add Sound to Video

Upload a silent video and let AI add matching sound effects and ambience.

How it works

1. Upload a video

Add a short silent video clip (mp4).

2. Describe the sound

Optionally type what it should sound like — or let AI decide.

3. Download or share

Save your video with sound instantly. No signup required.

Frequently asked questions

What does this tool do?

It listens to the motion in your video and generates matching sound effects and ambience — perfect for silent AI-generated clips.

What video formats are supported?

MP4 works best. Shorter clips process fastest.

Do I need to describe the sound?

No — the AI can generate sound automatically, but adding a prompt (like 'ocean waves and seagulls') gives you more control.

How long does it take?

Most clips are ready in under a minute.