Render a downloadable waveform PNG from any audio file
What is the Audio Waveform Generator?
The audio waveform generator works like this: it decodes audio with the Web Audio API, computes amplitude peaks across the track, and renders them as a customizable waveform PNG. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the Audio Waveform Generator
Select an audio file (MP3, WAV, M4A, OGG, FLAC).
Wait a moment while the track decodes and peaks compute locally.
Tune bar color, background and height with the live preview.
Download the PNG - it renders at 1200px wide for crisp embedding.
Features
Powered by in-browser FFmpeg (WebAssembly)
Your files never upload anywhere
Progress shown while processing runs
Common mistakes to avoid
Choosing bitrates below the platform minimum
Re-encoding already-compressed files repeatedly
Examples
Input
Result
A 40-minute podcast episode
A 1200x200 PNG waveform in your brand colors, ready for show notes
Best used for
Getting a reliable answer for audio waveform generator without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Audio and video processing runs on your device with WebAssembly FFmpeg; your files are never uploaded.
Frequently asked questions
What are the peaks exactly?
Each bar is the maximum absolute amplitude in its time slice - the same representation podcast apps and audio editors use.
Can I get the raw data instead?
The PNG is the deliverable; for data, the EXTRACT of amplitudes is what audio editors do natively with the same file.
What is the waveform image generated from?
The audio's real amplitude peaks, decoded and rendered as a PNG you can style - colour, height and background all configurable.
Why generate a static waveform?
Podcast covers, episode previews and audio embeds - a static image communicates the shape of a sound where a player cannot run.
Related tools
Audio Converter - Convert WAV to MP3, M4A to MP3, FLAC to MP3, AAC, OGG, Opus online free
Audio Joiner - Combine multiple audio files into one track in your chosen order
Audio Trimmer - Trim MP3, WAV, M4A audio files online by timestamp
Video to Audio - Extract MP3, WAV, M4A audio from MP4, MKV, MOV video files