About the Audio Waveform Viewer

Audio Waveform Viewer generates a waveform visualization image from any audio file — letting you choose colours and dimensions, then download the result as a PNG for use in presentations, thumbnails, or audio players.

How It Works

Your audio file is uploaded to our server where librosa loads the audio as a mono float32 array at its native sample rate (up to 300 seconds are processed). The amplitude values are plotted over time using matplotlib: a solid line of the waveform plus a semi-transparent fill beneath it creates the characteristic waveform look.

You can customise:

• Waveform colour — any hex colour (default sky blue #0ea5e9)
• Background — dark (near-black), white, or transparent
• Width — 800, 1200, or 1600 pixels
• Height — 200, 300, or 400 pixels

What Is sortout.app?

sortout.app is a growing collection of focused web tools, each designed to do exactly one thing well. Every tool is free, requires no account, and is built to load fast anywhere.

Privacy

Your files are sent to our server over HTTPS, processed immediately, and deleted — never stored or shared. See our full Privacy Policy.

Frequently Asked Questions

Is this tool free?

Yes, completely free with no usage limits.

Do I need to create an account?

No. There is no sign-up, no login, and no registration of any kind.

What audio formats are supported?

MP3, WAV, OGG, M4A, and FLAC. Maximum file size is 50 MB.

Can I use transparent background for overlays?

Yes — select the "transparent" background option and download the PNG. The waveform will render with no background, suitable for overlay on dark or light images.

Only the first 300 seconds are processed — why?

For server efficiency, audio longer than 5 minutes is capped at 300 seconds. The waveform will represent only the first 5 minutes of longer files.

Contact

Questions or feedback? Open an issue at github.com/sortout-app/feedback or email hello@sortout.app.