Does changing the speed also change the pitch?

Yes. In this version, speeding up raises the pitch and slowing down lowers it, just like changing the speed of a record. There is no pitch-preserving mode.

How fast or slow can I make the audio?

You can pick a wide range of rates, for example 0.5x to slow audio down or 2x to speed it up. Choose whatever fits your needs.

Is my audio uploaded anywhere?

No. All processing runs in your browser using the Web Audio API, so your file never leaves your device.

Which formats can I load and save?

You can load MP3, WAV, M4A, AAC, and OGG files, and export the result as MP3 or WAV.

Will changing the speed reduce quality?

The audio is re-rendered at the new rate. Exporting to MP3 adds typical lossy compression, while WAV keeps a lossless result.

Does it work on mobile?

Yes. It runs in any modern browser on Windows, macOS, Android, and iOS, though long files process faster on a desktop.

Yes. There are no watermarks, sign-ups, or file-size limits beyond what your device can handle.

Change Audio Speed

Speed up or slow down any audio file — fast, free, and processed entirely in your browser.

Runs in your browser — your files are not uploaded

100% local — your audio is never uploaded

Select an audio file

Drop your file here

Quick answer

What it does: Speed up or slow down any audio file — fast, free, and processed entirely in your browser.
Your files: Never uploaded — processed on your device
Price: Free, no account
Formats: MP3, WAV, M4A, AAC, OGG → MP3, WAV

Play audio faster or slower

Want to breeze through a lecture, slow down a song to learn it, or speed up an audiobook? This tool changes the playback speed of your audio and exports a new file at the rate you choose. Decoding and processing run with the Web Audio API on your own device, so nothing is uploaded to a server. Note that, like a record on a turntable, changing the speed also changes the pitch — faster sounds higher and slower sounds lower in this version.

Why use this speed tool

Speed up or slow down audio to any rate you choose
Great for lectures, audiobooks, music practice, and transcription
Supports MP3, WAV, M4A, AAC, and OGG input
Export to MP3 or WAV to suit your needs
Runs 100% in your browser — files stay on your device
No watermarks, no sign-up, no file-size paywall

How to change audio speed

Select your audio Drag and drop an MP3, WAV, M4A, AAC, or OGG file, or click to choose one.
Set the speed Choose a faster or slower playback rate, such as 1.5x to speed up or 0.75x to slow down.
Process The speed change is applied locally in your browser with the Web Audio API.
Download Save the new audio to your device as an MP3 or WAV file.

Your audio stays private

All processing happens directly in your browser. Your audio is decoded and re-encoded on your own device using the Web Audio API, and is never uploaded to any server. We collect only anonymous, aggregated usage statistics (such as how often the tool is used) to improve it — never your audio, filenames, or any personal data.

Verify it yourself: Open your browser DevTools → Network tab and run the tool: no request ever carries your file. Everything happens on your device.

FAQ

Does changing the speed also change the pitch?: Yes. In this version, speeding up raises the pitch and slowing down lowers it, just like changing the speed of a record. There is no pitch-preserving mode.
How fast or slow can I make the audio?: You can pick a wide range of rates, for example 0.5x to slow audio down or 2x to speed it up. Choose whatever fits your needs.
Is my audio uploaded anywhere?: No. All processing runs in your browser using the Web Audio API, so your file never leaves your device.
Which formats can I load and save?: You can load MP3, WAV, M4A, AAC, and OGG files, and export the result as MP3 or WAV.
Will changing the speed reduce quality?: The audio is re-rendered at the new rate. Exporting to MP3 adds typical lossy compression, while WAV keeps a lossless result.
Does it work on mobile?: Yes. It runs in any modern browser on Windows, macOS, Android, and iOS, though long files process faster on a desktop.
Is it really free?: Yes. There are no watermarks, sign-ups, or file-size limits beyond what your device can handle.