Upload your audio file
Choose an MP3, WAV or other audio file from your device; it loads instantly into the built-in player.
Audio Playback Speed Changer
Upload any audio file and play it back slower or faster, from 0.25x to 3x, with an optional pitch-preserving mode, right in your browser.
How it works
Drag the speed slider
Set anywhere from 0.25x to 3x; the current speed is always shown next to the slider.
Toggle pitch preservation
Keep the original pitch while changing speed, or turn it off for a classic chipmunk or slow-motion effect.
FAQ
Is my audio file uploaded to a server?
No. The file never leaves your device — it's loaded directly into your browser's audio player and processed locally.
What does 'preserve pitch' do?
When enabled, your browser keeps the pitch of the audio constant even as you speed it up or slow it down. Turn it off if you want the classic higher or lower pitch effect.
What audio formats are supported?
Any format your browser can play natively, including MP3, WAV, OGG and M4A.