Change Audio Speed
Change Audio Speed online — Speed up or slow down audio (pitch changes with it). Exports WAV, 100% in your browser.
🔒 Audio is decoded and edited on your device — recordings never leave your browser.
Change Audio Speed: speed up or slow down audio (pitch changes with it). Audio is decoded and edited on your device and exported as lossless WAV — recordings never upload.
About Change Audio Speed
Change Audio Speed in your browser. Speed up or slow down audio (pitch changes with it). Your file is decoded with the Web Audio API, edited locally and re-encoded as a 16-bit PCM WAV (lossless and universally supported). Nothing is uploaded, so voice notes and music stay private.
How to use Change Audio Speed
- 1Drop your audio file.
- 2Adjust the controls shown for this tool.
- 3Preview and download the WAV result.
Why use Change Audio Speed?
- ✓Quick audio edits without installing Audacity or a DAW.
- ✓Private — your recording never leaves your device.
- ✓Works with MP3, WAV, M4A/AAC, OGG and FLAC inputs.
Frequently asked questions
How do I change audio speed?+
Drop your audio here, adjust the settings, and download the edited WAV. Everything runs in your browser.
What input formats are supported?+
Any format your browser can decode — typically MP3, WAV, M4A/AAC, OGG and FLAC. The output is always a lossless WAV.
Why is the output WAV and not MP3?+
WAV can be created losslessly in the browser without extra libraries, so quality is perfect. You can convert the WAV to MP3 afterwards if you need a smaller file.
Is my audio uploaded?+
No — decoding and editing happen entirely on your device.
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