Mono to Stereo Converter

Convert mono audio to stereo by duplicating channel – perfect for headphones and modern devices

Drag & drop a mono audio file or click to browse

How to convert mono to stereo:

  1. Select a mono audio file (MP3, WAV, OGG, M4A, FLAC, etc.)
  2. The tool detects the number of channels – if mono, it will create a stereo file by copying the mono channel to both left and right
  3. Choose output format (MP3 recommended) and bitrate in the settings panel
  4. Click "Convert to Stereo & Export" – the stereo file will be generated
  5. Download and enjoy wider sound on headphones and stereo systems

All processing happens in your browser – files never leave your device.