Audio Waveform Generator — Export PNG Waveform Art

How to use

1. Drop or pick an audio file — it decodes on your device.
2. Choose a bar color and background (transparent works for overlays).
3. Press Download PNG to save the 1000×220 waveform.
4. Read duration and peak dBFS to spot clipping.

About this tool

Drop any audio file and this tool decodes it locally with the Web Audio API, scans the left channel for amplitude peaks, and draws a classic 200-bar waveform on a canvas — the kind of art podcasters and producers drop into episode covers, video overlays and show notes. Pick from four bar colors and three backgrounds including transparent, which exports a PNG that layers cleanly over any artwork. The canvas exports straight to a PNG download at 1000×220, and the readout shows the file's exact duration and peak level in dBFS so you can spot clipping at a glance. Long files are downsampled into buckets, so a two-hour mix draws as fast as a 30-second clip. Your audio never leaves the tab. Your file never leaves this page — processing runs entirely in your browser; nothing is uploaded and the data is dropped from memory when you close the tab.

FAQ

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