Free Audio Speed Changer
Speed up or slow down a local audio file while requesting pitch preservation in this browser.
Audio Speed Changer
Download transformed WAVEnter a value to begin.
How to use this audio speed changer
- Choose one browser-decodable audio file, select 0.5× through 2× speed, keep the tab open during silent playback and download the WAV.
- Check the inputs and preview, then use the primary action.
- Download, copy or use the result shown by the tool.
How the result is calculated
A temporary media element changes playback rate with browser pitch preservation enabled. A same-origin AudioWorklet captures the decoded mono or stereo samples into bounded PCM chunks, and the shared local writer creates WAV output. Transformation takes the adjusted playback duration; pitch-preservation quality depends on the browser.
Method source: MDN preservesPitch documentation.
All calculation and transformation work happens in this browser tab. No entered value is sent to an Noler Tools application server.
Important limitations
Results are provided for convenience and should be checked independently before an important decision. A format or checksum result never authenticates an identity, document, account, licence, vehicle or registration.
Frequently asked questions
Is this audio speed changer free?
Yes. It is free to use and does not require an account.
Does Noler Tools save my input?
No. The input and result remain in temporary browser memory and are not uploaded or saved by this site.