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Audio to Video Visualizer
Turn a song or podcast clip into an MP4 with cover art and a moving waveform or spectrum.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Audio to Video Visualizer works
The sound is processed by ffmpeg compiled to WebAssembly, running in your browser. The engine (about 30 MB) downloads the first time and is cached after that, so nothing is ever uploaded. The background with your cover and title is drawn on a canvas, then ffmpeg animates showwaves, showfreqs, showspectrum or a stereo scope on top and encodes H.264.
Input: MP3, WAV, M4A, OGG, FLAC, JPG, PNG. Output: MP4.
How to use Audio to Video Visualizer
- Drop the audio.
- Add a cover image, title and artist.
- Pick the animation and shape.
- Render the MP4.
Tips
- WAV is lossless but large; MP3/AAC/OGG are compact for sharing.
- Engines load on first use and are cached afterwards.
Audio to Video Visualizer FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Waveform and Spectrogram Image: Turn audio into waveform art or a spectrogram, as PNG or SVG.
- Ringtone Maker: Cut the best part of a song, add fades and save an iPhone M4R or an Android MP3 ringtone.
- Audio Editor & Trimmer: Trim, fade in/out, change volume and export with a waveform.
- Volume Booster and Normalizer: Make quiet audio or video louder, or even out loudness to a standard level (EBU R128).