MP3 to MP4: turn audio into a waveform video

Add your MP3 above, pick a look and frame shape, and press Make video to open the editor. Because an MP3 has no picture of its own, Audo creates an MP4 waveform video that reacts to your sound, with a title, optional cover art and a progress bar. Every export includes a moving waveform rather than a blank black screen or a plain static image.

It works as both. Podcasters call a spoken clip with a waveform, title and cover art an audiogram; musicians and YouTube creators call a sound-reactive video an audio visualizer. As an audio visualizer and audiogram maker, Audo offers five 2D waveform styles—bars, line, mirrored bars, a circular ring and dots—with custom colours, thickness, gap, sensitivity and smoothing. It draws clean 2D soundwaves rather than 3D particle effects.

Yes. Choose Square (1:1), Vertical (9:16), Wide (16:9) or Portrait (4:5) on the page or under Frame in the editor. The Shorts look starts with a tall 9:16 frame for TikTok, Reels and YouTube Shorts, while Wide (16:9) fits full-length YouTube uploads and Square (1:1) fits podcast feeds.

Yes. Under Visuals in the editor, upload a PNG, JPEG or WebP as a square or rounded cover box, as a blurred background image, or both, or pick a solid colour or two-colour gradient. Switch to Text to edit the title and subtitle font, size, colour and placement on the canvas. Every layout keeps the moving waveform; to put words or a logo onto a video that already has its own footage, use Add text to video.

No. The waveform follows the loudness of your recording without filtering, shortening or remixing the sound, and YouTube, TikTok and Instagram accept the exported H.264 MP4 with AAC audio directly. In the editor you can also turn on Remove noise, Audio enhancer, captions or trims before you export if the recording needs cleanup.

Audo renders the first two minutes free, three times a day, without a watermark or sign-up. A free result ends at that limit even when the source is longer. The whole recording costs $0.02 a minute ($1.20 an hour), charged only on success. No subscription. See pricing. You can also start from WAV, M4A, FLAC and other supported audio formats.