nuku tools
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Audio to video (add a picture to music)

Turn a song, talk or recording into an MP4 video with a picture or a coloured background and a caption — ready for YouTube, Reels, Shorts or Facebook. Up to 500 MB.

⭐ Use this often? Press Ctrl+D (⌘+D on Mac) to bookmark it — next time it is one click away.

How to use

  1. Add a music or voice file.
  2. Pick the shape, then a picture or a background colour, and type the words to show.
  3. Press Start, wait for 100 %, play it on the page, then download.

Questions

Are my files uploaded anywhere?
No. Everything runs inside your browser on your own device. Your files are never sent to our servers.
Is it free?
Yes. No sign-up, no watermark, no limit on how many times you use it.