Live tempo fader
Drag the tempo fader while a track plays and hear the speed change in real time, no waiting for a render.
Live Pitch and Tempo
Key and BPM Changer
Drop in a track and drag a tempo fader and key stepper while it's playing, just like a CDJ. KeyTone shifts pitch and tempo live in your browser, independently or together.
What it does
Independent key control
Shift the key up or down in semitones without touching tempo, or combine both for a full remix pass.
Auto-detected baseline
KeyTone detects the track's original BPM and key on load, so you always know what you're adjusting from.
Runs entirely in your browser
Live preview uses real-time audio processing on your device, no upload wait and no server round trip.
Free to preview
Sign in free and load a track, play it, and drag the faders live at no cost, no credit card required.
Pro export
Download the processed track as a WAV file with a Pro plan once you've dialed in the sound you want.
Frequently asked
Is the key and BPM change really live?
Yes, dragging the tempo fader or key stepper while the track is playing shifts the sound immediately, the same way a CDJ pitch fader works.
Do I need an account to try it?
Yes, sign in free to load a track and preview live tempo and key changes, no credit card required. A Pro plan is only needed to export the processed file.
Can I change tempo without changing the key?
Yes, the tempo fader and key stepper are independent, so you can speed up or slow down a track while keeping its original key, or the reverse.
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Try it free, no credit card required
Every free account gets weekly credits across all Create tools, and Discover tools are always free to use.