TEMPO CHANGER
100% LOCAL — NOTHING UPLOADSSpeed any audio up or down — pitch stays locked. Free, no account.
How it works
Your file is processed entirely in your browser with a time-stretch engine — it never leaves your machine. Slow a beat down to learn it, or speed a demo up without the chipmunk effect.
Does changing tempo affect pitch?
No — the time-stretch engine moves speed independently. Key and pitch stay exactly where they were.
What range can I stretch to?
50% to 150% of the original speed. Extreme stretches trade some fidelity — small moves stay transparent.
What formats can I export?
24-bit WAV at the source sample rate. MP3 export is on the way.
Why does it say 100% local?
All processing happens on your device — nothing is uploaded, so your unreleased beats stay yours.