Single-channel output
Combine stereo content into one channel.
VoysumPrivate browser tool
Stereo to Mono Converter
Combine left and right channels into a mono MP3 for speech, compatibility, or smaller workflows.
No uploadNo accountFree to use
✓ Runs locally in your browser
↥Choose or drop a fileaudio/*, .mp3, .wav, .m4a, .webm · up to 500 MB
🔒 Your media file is never uploaded to Voysum.
Private by default
Useful conversion without giving up your file.
Useful for speech
Mono is often sufficient for interviews, meetings, and voice recordings.
Stays private
Audio is not sent to Voysum.
Common questions
Stereo to Mono Converter FAQ
How local browser processing works and what to expect.
Does mono reduce file size?
It can reduce required audio data, although final size also depends on bitrate.
Can mono be converted back to true stereo?
It can be duplicated to two channels, but original left-right differences cannot be restored.
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