Convert MP3 to MP4 Video Online Free
Runs 100% in your browser — your files never leave your device.
Platforms like YouTube, Instagram, and TikTok insist on video even when you only have sound. This tool wraps your MP3 track into a real MP4 with a tidy neutral still frame as the picture, encoded locally for typical files. Larger ones finish on our servers and are auto-deleted within an hour.
How it works
- 1
Add your file
Drop it in or click to browse. Typical files convert entirely on your device.
- 2
Convert the audio
Large files finish on our servers instead and are deleted within an hour.
- 3
Download
Save the converted file instantly — free, no watermark, no account.
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