Audio Speed Changer
Speed up or slow down any audio file from 0.25x to 4x. Option to preserve pitch.
Initialize Processing Engine
Download required (~31MB) to process audio securely in your browser.
Related Tools
Audio Speed Changer — Speed Up or Slow Down Audio
Speed up or slow down any audio file with our free browser-based speed changer. Adjust playback from 0.25x to 4x with the option to preserve the original pitch. Perfect for learning music by ear, transcribing interviews, speed-listening to podcasts, or creating audio effects.
How to use Audio Speed Changer
- Upload your audio file (MP3, WAV, OGG, FLAC).
- Use the slider to adjust speed from 0.25x to 4.0x.
- Toggle the "Preserve pitch" option to avoid the chipmunk or deep voice effect.
- Preview the modified track, then download as MP3 or WAV.
Features
- Speed options — Range from 0.25x (quarter speed) to 4x (quadruple speed).
- Preserve pitch option — Change the speed while keeping the natural tone intact.
- Real-time playback preview — Listen and experiment before committing.
- Multiple format support — Easily process MP3, WAV, OGG, FLAC, and M4A.
Frequently Asked Questions
Can I speed up audio without changing pitch?
Yes. Enable the "Preserve pitch" option and the audio will play faster or slower without the chipmunk or deep voice effect. This uses the Web Audio API's built-in pitch preservation.
How much can I speed up or slow down audio?
Our tool supports speeds from 0.25x (4 times slower) to 4x (4 times faster). Use 1.5x-2x for podcasts and lectures, 0.5x-0.75x for learning music by ear.
Is my audio file kept private?
Absolutely. Our speed changer processes everything in your browser. Your audio file is never uploaded to any server — it stays on your device from start to finish.