Convert an audio file to mono
Mixes left and right into a single channel. In WAV/FLAC the file weighs about half; in MP3 it depends on the bitrate.
Your files never leave your device
How to convert to mono
- 1
Upload the audio
Stereo or multichannel.
- 2
Convert
The channels are mixed into one without volume imbalance.
- 3
Download the result
Same format as the original.
Why use this tool
Lighter voice files
For podcasts and dictation stereo adds nothing and doubles the data.
Proper downmix
The channels are averaged, not discarded, so you do not lose instruments.
Private
Your audio never leaves your device: ffmpeg runs inside your browser.
Real engine
ffmpeg, the industry standard, compiled to WebAssembly and self-hosted.
Frequently asked questions
How much space do I save?
In WAV, FLAC or AIFF, about half. In MP3/M4A it depends on the chosen bitrate, but mono at the same bitrate sounds more solid.
Do I lose part of the sound?
You lose the spatial separation (left/right). The sonic content is preserved because both channels are mixed.
What if it is already mono?
The result comes out the same: the conversion is idempotent and breaks nothing.