What can I do with Waveform Generator?

Render a transparent waveform PNG from any audio file. Waveform Generator is part of the Audio shelf on utils.sbs and is designed for quick, one-off tasks.

Is Waveform Generator free to use?

Yes. Waveform Generator is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use Waveform Generator?

No. Waveform Generator is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

What formats does Waveform Generator support?

It accepts audio formats your browser can decode and exports a downloadable WAV or converted file.

Can I use Waveform Generator on my phone?

Yes. Waveform Generator is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Audio tool

Waveform Generator

Render a transparent waveform PNG from any audio file.

Runs on-deviceNo sign-upFree

All audio tools

Workspace

Waveform Generator

Runs locally

Drop an audio file

or · MP3, WAV, M4A, OGG

Waveform colour

Background

Width

Audio is decoded with the Web Audio API and exported as uncompressed WAV. MP3 export is intentionally avoided; WAV keeps the result lossless and local.

Load audio, then process it on this device.

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

Waveform Generator is a free browser-based audio tool. Render a transparent waveform PNG from any audio file. It runs with the Web Audio API locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is Waveform Generator?

Waveform Generator is a free browser-based audio tool from utils.sbs. Render a transparent waveform PNG from any audio file. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

Category	Audio
Input	MP3, WAV, OGG, M4A or another browser-decodable audio file
Output	A WAV or converted audio file
Engine	the Web Audio API
Processing	In your browser
Price	Free
Account	Not required

How Waveform Generator works

Audio is decoded with the Web Audio API, processed with standard digital-signal operations, and encoded back to WAV in the browser.

How to use Waveform Generator

1Open Waveform Generator and add your input.
2Adjust the options: waveform colour, background, width.
3Run the tool, check the preview or result, and download the output.

When to use Waveform Generator

Trim, fade or join recordings into one clean file.
Normalise volume or change the speed of a clip.
Convert audio to WAV for editing or archiving.

Inputs and options

Waveform colour: Set this value before running the tool.
Background: Set this value before running the tool.
Width: Enter a numeric value in px.

Limitations

Browser codec support varies. WAV is used for export where predictable, uncompressed output matters.

Privacy and accuracy

Waveform Generator processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ