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. Listen and mark a passage, then create a preview. Changing settings keeps the original and previous preview available; update before downloading. Extreme shifts may introduce 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: Compare the original player with the processed preview. After changing settings, update the preview before downloading.
Export: Renders a WAV in the browser. The file is decoded on your device and is never uploaded.

Open a file and listen to the original immediately.
Mark A and B, set speed and pitch, then create or update the preview.
Compare the players and download the current processed result as WAV.

A few useful answers

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