MP3 to MP4: turn audio into video
YouTube, TikTok and Instagram do not accept audio files. To post a song, a mix or a podcast you need a video. Drop in an MP3 and this audio to video converter gives you an MP4 with an audio visualizer that moves with the sound — rendered in your browser, with nothing uploaded.
How to do it
- 01
Drop in your audio
MP3, WAV, FLAC or M4A, up to 20 minutes long. The file is read by your browser; it is not uploaded anywhere.
- 02
Choose how it looks
Pick an audio visualizer style, add your cover art and the title if you want them on screen, and choose 16:9, 9:16 or 1:1.
- 03
Export the MP4
The video is rendered on your device and saved straight to your computer as an MP4 with your audio inside.
Why audio needs to become video
Video platforms only take video files. The usual workaround is a converter that pairs your MP3 with a still image or a black frame. It uploads, but nothing on screen moves, and viewers leave.
An audio visualizer solves the same problem and gives people something to watch: bars, waves or particles that react to the kick, the bass and the highs of your track.
When a plain converter is the better tool
If you only need the file format changed and do not care what the picture looks like, a basic MP3 to MP4 converter is quicker. This tool is for when the video itself should look finished: a release on YouTube, a clip for Shorts, a podcast episode with a moving waveform.
Private by design
Most online converters upload your audio to their servers. Here, analysis and rendering both run on your own device, so unreleased music and private recordings never leave it.
Styles that suit this
MP3 to MP4 FAQ
Is this MP3 to MP4 converter free?
Yes. You can convert up to 5 minutes of audio to video in 720p, 3 times a day, for free. Free exports carry a small watermark; paid exports are clean, run longer and go up to 4K.
Does converting MP3 to MP4 reduce the audio quality?
The audio is encoded as AAC at 192 kbps, which is the standard for online video. For the best result start from a WAV or FLAC rather than a low-bitrate MP3.
Can I convert WAV, FLAC or M4A to MP4 too?
Yes. WAV, FLAC, M4A and MP3 all work the same way, up to 20 minutes per file.
Is my audio uploaded?
No. The audio to video conversion happens in your browser, on your device. Nothing is sent to a server.
Can I use a still image instead of an audio visualizer?
You can add your cover art as the background and turn the intensity down so the audio visualizer is subtle, but there is always some motion — that is what this tool is for.