Convert mono to stereo
Upload a mono audio file and turn it into a two-channel stereo file.
Upload a mono audio file and turn it into a two-channel stereo file.
The single channel is duplicated onto left and right, producing a technically stereo file with identical sides, often called dual mono. It sounds the same, centered, but now satisfies any tool or spec that insists on two channels.
Honest note: no tool can synthesize real stereo separation from a mono source. What this gives you is compatibility, not spaciousness.
Some video platforms, broadcast deliverables, DAW templates, and consumer players assume two channels and misbehave on mono input: rejected uploads, one-sided playback, or forced re-encodes. Dual mono resolves all of these cleanly.
No, both channels carry the same signal, so it sounds exactly like the mono original, centered between the speakers.
Any supported audio format; the output keeps your file’s format with two channels.
Yes, fully in-browser, nothing uploaded.