Local privacy
Files are decoded in memory and never sent to Tervix.
Change Audio Speed
Change playback speed and duration with transparent pitch effects.
Your files are processed locally and are never sent to our servers.
Drop an audio file here or choose one
This browser cannot perform this operation or decode this format.
How to use this tool
- 1
Choose a playback factor and review the new duration and pitch.
- 2
Review the waveform, parameters and browser limitations.
- 3
Preview and download the result without leaving the browser.
Transparent local audio
Real compatibility
Codecs the browser cannot process are never promised.
Verifiable export
Edits export as PCM WAV and batches as ZIP.
Frequently asked questions
Does speed change pitch?
Yes. Increasing speed raises pitch and shortens duration.
Is my file uploaded?
No. Loading, processing and export happen on your device.
Why might a format fail?
Each browser exposes different codecs. Tervix reports the error and preserves the source.