About the Audio Speed Changer
Change playback speed from 0.5× to 2× for practice, transcription or fitting a clip to a time slot. The result is exported as WAV at the new duration.
How to use it
- 1Open the audioThe original duration is shown.
- 2Choose a speed0.5× halves the tempo; 2× doubles it.
- 3Export WAVThe preview and download use the resampled audio.
Why use this audio speed changer?
- Nothing leaves your device. The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait. You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas. No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my audio safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Does pitch stay the same?
No. This version resamples, so pitch follows tempo like a record player. That is useful for practice; pitch-preserving time-stretch requires a more advanced DSP engine.