Stereo to Mono Converter
Convert two-channel stereo audio into a single balanced mono channel. Perfect for podcasting, telephony, and eliminating phase cancellation.
Drop your audio file here
or
Supports MP3, WAV, FLAC, AAC, OGG · Max 200 MB
How it works
Upload your audio
Drop or select any stereo audio file — MP3, WAV, FLAC, AAC, or OGG. It stays entirely on your device.
Browser converts it
The Web Audio API averages the left and right channels sample-by-sample into a single mono channel.
Download the result
Get a clean 16-bit PCM WAV file with one channel. Same sample rate, same duration, half the channel data.
Frequently asked questions
Why convert stereo to mono?
Mono audio is required for many broadcast, podcast, and telephony systems. It also cuts file size roughly in half and avoids phase cancellation issues when audio plays back through a single speaker.
Will I lose audio quality?
The conversion averages both channels mathematically. You won't lose clarity or dynamic range — you simply lose the stereo width. The output is a lossless 16-bit WAV at the original sample rate.
Is my audio uploaded anywhere?
No. All processing happens in your browser using the Web Audio API. Your file never leaves your device.
What file formats are supported?
Any format your browser can decode — typically MP3, WAV, FLAC, AAC, OGG, and WebM. The output is always a WAV file.
What if my file is already mono?
The tool will process it and produce the same mono audio. It will show 1 channel in the 'before' info, and the output will also be 1 channel.