Convert stereo to mono
Convert stereo to mono, mono to stereo, or keep only the left or right channel.
Drop an audio file
or drop it here, or paste. Up to 500 MB per file.
Runs in your browser. Your files are not uploaded.
Formats: the format list shows only what this browser can encode. MP3 and FLAC use an encoder that downloads the first time you choose them. M4A (AAC) is not available in every Firefox version.
Memory: audio is decoded in full, about 23 MB per minute of 48 kHz stereo, so long recordings can be slow on phones. Files that would need more than about 1 GB once decoded (about 45 minutes of 48 kHz stereo, or 90 of mono) are refused before decoding.
How to use Convert stereo to mono
Choose an audio file or drop it on the page.
Choose Stereo to mono, Mono to stereo, Left channel only or Right channel only.
Pick the output format.
Select Apply, then download the result.
Questions
No. Everything runs in your browser and the file never leaves your device.
Choose Stereo to mono and select Apply.
A mono file has one channel, which usually makes it smaller; it is common for speech.
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- Fade audio in and outAdd a smooth fade in at the start and a fade out at the end.
- Change audio speed and pitchPlay audio faster or slower. Pitch changes with speed, like a tape.