Convert Stereo to Mono

Q: One side is silent or noisy. What do I do?

Press Left only or Right only to keep the good side. The file becomes mono, made from that channel.

Q: Can I swap the channels or fix the balance?

Yes. Swap left and right swaps them, and the Balance slider turns one side down: set it, then press Apply balance. Both work on a selection or on the whole file, and the file stays stereo.

Mix the two sides of a recording into one channel, keep only the left or the right, swap them, or fix a recording that leans to one side. It all happens in your browser, so the file never leaves your device.

Convert to Mono

How to Convert Stereo to Mono

Open your file in the audio editor and choose the Volume tool on the left. The Channels part is under the volume buttons.
Press Make mono to mix left and right into one channel. To keep one side, press Left only or Right only.
Play it back, then press the save button at the top right (Save MP3, Save WAV or Save M4A). The saved file has one channel.

Questions

When is mono better?

For a voice recorded with one microphone, a recording that is louder on one side, or a podcast people hear on a phone speaker: mono sounds the same on every speaker and in both ears, and a mono WAV is half the size.

One side is silent or noisy. What do I do?

Press Left only or Right only to keep the good side. The file becomes mono, made from that channel.

Can I swap the channels or fix the balance?

Yes. Swap left and right swaps them, and the Balance slider turns one side down: set it, then press Apply balance. Both work on a selection or on the whole file, and the file stays stereo.

Can I go back to stereo?

Yes, Ctrl+Z (or the undo button) brings both channels back. Saving makes a new file, so your original stays as it is.

Is my audio uploaded?

No. The channels are mixed in your browser. The file is read from your device and saved back to it.