Audio Speed Changer
Speed up or slow down any audio file without changing its pitch — free, in your browser — free, fast and private.
Choose an audio file to begin.
Your result will appear here.
How to use Audio Speed Changer
- Choose an audio file.
- Pick a speed from 0.5x to 2x.
- Click Process Audio.
- Download the speed-changed audio as WAV.
Honest limit: this tool changes speed by resampling the audio (faster = shorter, slower = longer), which also shifts pitch slightly, like playing a tape faster. True pitch-preserving time-stretch needs server software. Output is WAV.
Frequently Asked Questions
Is the Audio Speed Changer free?
Yes, it is 100% free with no sign-up. Your files and data stay in your browser.
Does the pitch change too?
Yes, slightly — this resamples the audio, so faster sounds higher and slower sounds lower, like a tape. True pitch-preserving stretch needs desktop software.
Is my file uploaded to a server?
No. This tool runs entirely in your browser — your file is never uploaded.
What speeds are supported?
0.5x (half speed) to 2x (double speed).