Audio Waveform Image Maker
Turn any audio file into a waveform picture as PNG or SVG in your browser, with no watermark.
- Runs in your browser, files never leave your device
- Free, open source, no account, no ads
- Works offline after the first visit
Make a waveform image from an audio file
Drop an audio file here or choose a file
MP3, WAV, OGG, FLAC, M4A and more. Nothing is uploaded. Everything happens on this device.
Sample preview. Load an audio file to draw its waveform.
How it works
- Open an audio file. Drop an MP3, WAV, OGG, FLAC or M4A on the page. Your browser decodes it on this device and shows its duration, sample rate and peak level.
- Style the waveform. Pick bars, mirrored lines or an outline, the bar width and gap, one color or a gradient, a background or transparency, the image size and, if you like, only part of the track.
- Download PNG or SVG. The image is drawn locally at the exact size you chose, with no watermark, and saved next to your other downloads.
Questions, answered
Are my files uploaded anywhere?
No. Audio Waveform Image Maker runs entirely in your browser. Your files are read into memory on your device, processed with JavaScript, and never sent to a server. You can disconnect from the internet and it keeps working.
Which audio formats can I use?
Anything your browser can play: MP3, WAV, OGG, Opus, FLAC and, in most browsers, M4A and AAC. If a file cannot be decoded you see a message right under the preview, and nothing else changes.
PNG or SVG: which should I pick?
PNG is a ready-to-use picture at the size you chose, for social posts and thumbnails. SVG is a vector file with the same bars and colors that stays sharp at any size, which suits prints, posters and laser or vinyl cutters. Turn on Transparent to place either one over your own artwork.
Is it really free?
Yes. It is open source under the MIT license, with no account, no limits and no ads. If it saves you a paid subscription, you can say thanks on Ko-fi.
Does it work offline?
Yes. After your first visit the page is cached by a service worker, so it loads without a connection. You can also install it from your browser's menu as an app.
Was this written by AI?
Yes. Audio Waveform Image Maker was generated by Claude Code from a written specification inside an automated pipeline, with a test suite that runs in a real browser. The full source is on GitHub, so you can read every line before you trust it with your files.
Built by one person, given away for free
Audio Waveform Image Maker is a free alternative to paid tools like Kapwing and Veed audio waveform visualizers. If it earns a place in your bookmarks, a coffee keeps the updates coming.
☕ Support Or on Ko-fi