What can I do with Audio Speed Changer?

Speed up or slow down audio while changing pitch naturally. Audio Speed Changer is part of the Audio shelf on utils.sbs and is designed for quick, one-off tasks.

Is Audio Speed Changer free to use?

Yes. Audio Speed Changer is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use Audio Speed Changer?

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

What formats does Audio Speed Changer support?

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

Can I use Audio Speed Changer on my phone?

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

Audio tool

Audio Speed Changer

Speed up or slow down audio while changing pitch naturally.

Runs on-deviceNo sign-upFree

All audio tools

Workspace

Audio Speed Changer

Runs locally

Drop an audio file

or · MP3, WAV, M4A, OGG

Playback speed1.25

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

Audio Speed Changer is a free browser-based audio tool. Speed up or slow down audio while changing pitch naturally. 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 Audio Speed Changer?

Audio Speed Changer is a free browser-based audio tool from utils.sbs. Speed up or slow down audio while changing pitch naturally. 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 Audio Speed Changer 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 Audio Speed Changer

1Open Audio Speed Changer and add your input.
2Adjust the options: playback speed.
3Run the tool, check the preview or result, and download the output.

When to use Audio Speed Changer

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

Playback speed: Set this value before running the tool.

Limitations

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

Privacy and accuracy

Audio Speed Changer 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