Audio Speed Changer
Speed up or slow down any track from 0.5× to 2× — keep the original pitch for podcasts and lectures, or let pitch follow tape-style for musical edits. Preview instantly on the waveform and export MP3, WAV, FLAC, M4A, or OGG. Nothing is uploaded.
Drop an audio file here
or click to browse
How it works
Load your audio
Drop in an MP3, WAV, or any audio file. It decodes on your device and the waveform appears instantly.
Set the speed
Drag the speed slider from 0.5× to 2×. Check "Keep pitch" for voice content, or leave it off for tape-style speed with pitch shift.
Export any format
Preview in real time, then export MP3, WAV, FLAC, M4A, or OGG at the new speed. Cuts and fades apply in the same pass.
Frequently asked questions
Can I change speed without changing pitch?
Yes. Check "Keep pitch" and the export uses a high-quality tempo algorithm (ffmpeg atempo) that changes speed while preserving pitch — ideal for podcasts, lectures, and audiobooks. Unchecked, pitch follows speed like a tape machine, which is what most musical edits want.
Does this work for slowing down music to practice?
Yes — set 0.5×–0.9× with "Keep pitch" on and the track slows down at its original pitch, so you can play along. You can also select just the solo you're practicing and export only that section.
Will changing speed reduce audio quality?
Pitch-following speed changes are essentially lossless resampling. Pitch-preserving changes use time-stretching, which is very clean at moderate settings (0.75×–1.5×) and still good at the extremes. Export WAV or FLAC to avoid any additional encoding loss.
Is my audio uploaded anywhere?
No. Decoding, preview, and export all run in your browser via WebAssembly. Your file never leaves your device — close the tab and it's gone.
Also try the slowed + reverb maker, the nightcore maker or the MP3 cutter— all part of the full Audio Studio.