Convert MP3 to MP4

Free, private and unlimited. Your file never leaves your device.

Drop your MP3 file hereor click to choose a file

Some platforms only accept video uploads. This tool wraps your MP3 audio in an MP4 video (with a clean dark background), so you can post audio to video-only platforms without any editing software.

How to convert MP3 to MP4

  1. Click the box above (or drag & drop) to select your MP3 file.
  2. Press “Convert to MP4”. The conversion runs right in your browser.
  3. Download your MP4 file. That’s it: no signup, no watermark.

Why use this converter?

Frequently asked questions

Is this MP3 to MP4 converter really free?

Yes. It is completely free with no signup, no watermarks and no conversion limits.

Are my files uploaded to a server?

No. The converter uses WebAssembly to run FFmpeg inside your browser, so your MP3 file never leaves your device. That also means there is nothing for us to store or share.

Is there a file size limit?

There is no artificial limit. Because everything runs in your browser’s memory, very large files (over ~1.5 GB) may fail depending on your device.

Do I need to install any software?

No. Everything works in your browser, desktop or mobile. There is nothing to download or install.

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