Audio Speed Changer
Increase or decrease audio playback speed in your browser.
Note: changing speed also changes pitch (the natural tape-speed effect). True pitch-preserving time-stretch needs heavy processing we've chosen not to load here; for that, a desktop editor like Audacity does it well.
How it works
The audio is re-rendered at your chosen speed using an offline audio engine in your browser. With preserve pitch off, speeding up also raises pitch (the classic tape-speed effect). With it on, the tool keeps the original pitch while changing tempo. Output is WAV.