Change Audio Speed
Speed up or slow down an audio file (0.5x–2x) without pitch breakup
🔒 Files are never uploaded to a server — everything runs right in your browser.
Drag & drop your file here
or click to choose from your computer
⏩ No pitch breakup
The atempo filter changes speed while keeping the pitch, so voices do not sound too high or low.
⚡ Runs on your device
The first run downloads a ~25MB engine, then everything runs in your browser with no upload.
🔒 Private
The file never leaves your device.
Change Audio Speed Online
This change audio speed tool speeds up a long track or slows one down to study it, from 0.5x to 2x. The filter keeps the pitch, so voices do not sound too high or low.
Processing runs inside your browser with ffmpeg.wasm, so nothing is uploaded. The first run downloads a ~25MB engine.
How to change audio speed
- Drag and drop or choose an audio file.
- Drag the speed slider (0.5x–2x).
- Click Apply and download the MP3.
Key features
- Speed up or slow down from 0.5x to 2x.
- Keeps the pitch, no breakup.
- Runs in the browser with no upload.
FAQ
Do voices sound high when sped up? No. The atempo filter keeps the pitch, so voices stay natural.
Is the file uploaded to a server? No. Everything runs in your browser.
What format is the output? MP3.