Change Audio Speed
Speed up or slow down audio while keeping the pitch natural
- Files never leave your device
- Runs in your browser
- Free, no sign-up, no watermark
Drop audio files here, or click to choose
Accepts MP3, WAV, M4A, AAC, OGG, FLAC, WebM · You can also paste with Ctrl+V / ⌘V
How to use Change Audio Speed
Speed audio up or slow it down from 0.5× to 3× while keeping voices at their natural pitch, or switch to tape mode for the chipmunk effect. Set an exact rate or a target length, preview it live, and process several files at once.
- 1
Drop one or more audio files on the page.
- 2
Drag the Speed slider, click a preset (0.75× to 2×), type an Exact speed, or enter a Target length.
- 3
Under Pitch, choose Keep pitch or Tape (chipmunk), and press play to preview.
- 4
Pick the output Format and Bitrate, click Change speed, then Download.
Frequently asked questions
How does Keep pitch work?
The audio is time-stretched, so the speed changes but the pitch does not. It sounds natural for speech; with music, large changes can add slight artifacts.
Can I make a file fit an exact length?
Yes. Type the length you want in Target length, for example 0:30, and the speed is set to match.
What is the speed range?
0.5× to 3×. For videos, use Change Video Speed, which goes from 0.1× to 8×.
Which formats can I save?
MP3, M4A, OGG, WAV and FLAC, with a bitrate choice for the lossy formats.
Are my files uploaded?
No. The speed change is calculated in your browser.