Is my audio uploaded?

No. Decoding, processing and export all happen in your browser.

Does this cost credits?

No. The local audio tools are free and do not use generation credits.

Where does the exported file go?

Your device downloads it as a WAV; nothing is added to your library by this tool.

Audio speed & pitch changer

Slow down without changing key, or transpose without changing tempo. Preview and export your audio privately in your browser.

Choose an audio fileMP3, WAV, FLAC, AAC and more · Up to 20 MB / 5 minutes

Speed1.00×0.50×–2.00× · Pitch stays unchanged.Pitch0 semitones−12 to +12 semitones · Tempo stays unchanged.

Trim & loop practice

Start (seconds)

End (seconds)

Fade in

Fade out

Your file stays on this device. Adjust settings, then create a preview; changing settings clears the previous result. Extreme shifts may introduce audible artifacts. SoundTouchJS · MPL-2.0

Good to know

Change speed and pitch independently

Audio speed and pitch changes tempo and key separately in the browser: slow a song down while it keeps its key, or transpose it while the tempo stays put.

What each setting does

Speed: Changes how fast the track plays without moving the key.
Pitch: Transposes the audio in semitones without changing the tempo.
Presets: Practice slows the track while the key stays the same; nightcore speeds it up and raises the pitch together.
Compare: Switches between the original and the processed result to check the change.
Export: Renders a WAV in the browser. The file is decoded on your device and is never uploaded.

Choose an audio file from your device.
Set the speed and pitch you want, and compare the result with the original.
Export the processed audio as WAV.

A few useful answers

No. Speed and pitch are separate controls, so slowing a track down leaves its key where it was.