Convert audio to mono: help & limits

1. Choose a supported audio file.
2. Review the stereo-to-mono change.
3. Listen to the result, then download.

Examples

• Mix left and right into one channel.

Stereo channels are averaged. Out-of-phase sounds can cancel; listen before replacing a stereo copy. Mono input remains mono. Output is 16-bit PCM WAV at 48 kHz. Tags and artwork are not copied. Browser decoding may resample the recording.

One file, up to 50 MiB and 10 minutes. Mono or stereo only. Browser decoding support varies, especially for unusual WAV encodings or damaged MP3s. A low-memory device may fail within these limits. There is no server fallback.

Duration is checked before decoding and checked again afterward. Decoded samples are limited to 256 MiB. Decoding uses browser memory; malformed metadata can bypass the first duration check. Encoding runs in a worker. Cancellation discards the result and closes the decoder, but the browser may finish an already-running decode internally.

File bytes, names, and audio samples stay in browser memory. No recording is uploaded, logged, or saved in browser storage. Downloads stay wherever you save them. Reset releases previews and results; it does not securely erase RAM.

If decoding fails, choose an original file or try an updated browser. If a download opens in a player, use your browser’s Save or Share action. Keep the original until you have checked the output.

Mono WAV uses half the sample data of stereo WAV with the same duration and sample rate. It may still be larger than compressed MP3 input.