How to use the Stereo to Mono converter
- Choose the audio file.
- Choose stereo to mono, or mono to stereo.
- Click Convert.
- Download the result.
When to use mono
- Podcasts and voice recordings: the same sound with half the data.
- Recordings where the voice is only in one ear.
- Phone systems, smart speakers and some hardware that need mono.
Mono to stereo
Converting mono to stereo copies the same signal to both channels. It does not create a wider sound, but it fixes players and editors that play mono files in one ear only.
Good to know
Stereo to mono averages the left and right channels so nothing is lost from either side. Mono to stereo copies the signal to both channels.
Supported files
MP3, WAV, M4A, AAC, OGG, OGA, FLAC, OPUS, WMA, AIFF, AIF, AIFC, ALAC, AMR, AC3, MP2, M4B, M4R, CAF, AU, WEBA, 3GA, APE and VOC. Files up to 1 GB each.
Frequently asked questions
Will I lose anything going to mono?
Only the left–right placement. All instruments and voices are kept, mixed into one channel.
How much does the Stereo to Mono Converter cost?
Nothing. It is free with no registration, no watermark and no limit on how many files you convert.
Are my files safe?
Yes. Files are converted locally in your browser and are never uploaded. When you close the page, nothing is left behind.
Does it work on iPhone and Android?
Yes, in Safari, Chrome and other modern mobile browsers. Short files work best on phones; for long or high-resolution videos a computer is faster.