Local privacy
Files are decoded in memory and never sent to Tervix.
Mono and Stereo Converter
Mix, duplicate, extract or swap audio channels.
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
Mix, extract, duplicate or swap the available channels.
- 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
How is stereo mixed to mono?
Left and right samples are averaged to reduce clipping risk.
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.