Free Online Audio Speed Changer
Speed up or slow down any audio file — 0.25× to 3× — without installing any software.
- Free
- No sign-up
- Stays on your device
Why use this tool
0.25× to 3× Speed
Speed up or slow down audio without changing the pitch.
100% Private
All processing is done locally — your files are never uploaded.
Pitch Preserved
OfflineAudioContext playbackRate preserves natural pitch while changing tempo.
WAV Export
Download your speed-adjusted audio as a high-quality WAV file.
Instant Processing
No upload, no server queue. Processing takes seconds.
All Formats
Works with MP3, WAV, OGG, M4A, FLAC and more.
Frequently asked questions
Yes — completely free, no account required, no limits.
The playbackRate approach used here does change pitch proportionally with speed. For pitch-preserving speed change you would need additional DSP processing.
You can set any speed from 0.25× (quarter speed) to 3× (triple speed), in 0.05× increments.
The processed audio is exported as a WAV file for maximum quality.
Yes — speeding up interviews or lectures at 1.5× or 2× is a popular use case. The audio quality remains excellent.
No. Everything runs in your browser using the Web Audio API. Nothing leaves your device.
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