What happens to the two channels when converting stereo to mono?

They're combined (mixed down) into a single channel, preserving the content from both sides rather than discarding one.

Does converting to mono reduce the file size?

Often yes, since a mono file only stores one channel of audio data instead of two.

When converting mono to stereo, are the two channels different or identical?

The mono source is duplicated identically to both channels — it doesn't create new stereo separation that wasn't in the original.

Does Stereo/Mono Converter upload my files to a server?

No. Stereo/Mono Converter runs entirely in your browser using on-device processing, your files never leave your device.

Stereo/Mono Converter

Convert an audio file between stereo and mono.

Runs in your browser

Drop an audio file here

Choose File

About this tool

Stereo audio carries separate left and right channels, which is what most music is mixed for, but some contexts — a mono phone call system, a single-speaker playback device, or matching an existing mono asset — specifically need a single combined channel instead. This tool converts an audio file between stereo and mono in either direction, matching the channel format your destination actually needs.

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