Free audio pitch and speed changer
Song Key & BPM Changer
Change a song's key, pitch, speed or BPM independently. Adjust tempo without changing pitch, or transpose audio without changing speed—all in your browser.
Drop an audio file here
MP3, WAV, M4A, FLAC or OGG
How to change song key and BPM
Create a karaoke version in your range, slow down a practice track or match a song to a target tempo without installing audio software.
Add your song
Choose an audio file. The browser decodes it locally and analyzes its starting key and BPM.
Set pitch and tempo
Set a target BPM to change speed without changing pitch, or transpose by semitones to change key without changing tempo.
Preview and export
Listen to the changed track, refine the controls and render a WAV file directly on your device.
Audio pitch changer and speed changer in one
Control pitch, key, speed and BPM independently instead of changing them together like ordinary playback-speed controls.
Audio speed and BPM changer
Speed up or slow down a song and choose a target BPM while keeping its musical key and pitch unchanged.
Audio pitch and key changer
Transpose the entire track up or down in semitone steps for a new musical key or a more comfortable vocal range without changing speed.
Formant compensation
Reduce chipmunk-like or unnaturally deep vocal character when shifting pitch.
Real-time preview
Hear tempo and pitch changes before committing to a full offline render.
WAV export
Render the transformed audio in the browser and download an uncompressed WAV file.
Private processing
The source audio and transformed samples stay in memory on your device throughout the workflow.
Key and BPM changer FAQ
Answers about changing audio pitch, key, speed and BPM independently, plus local browser-based export.
Related tools
Continue working with your audio
Choose another focused browser tool for the next step in your workflow.
Not sure what BPM or key your track uses?
Analyze it first with the Song Key & BPM Finder, or tap along manually when the rhythm has an unusual feel.