Stereo to Mono Converter

Convert between stereo and mono audio

Max file size: 100MB. Supported formats: MP3, WAV, OGG, M4A, FLAC
Tip: Converting stereo to mono reduces file size by combining both channels. Converting mono to stereo duplicates the single channel to both left and right, but doesn't create true stereo separation.
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Free Online Stereo to Mono Converter - Convert Audio Channels

Why Use Our Stereo/Mono Converter?

Our stereo to mono converter is a free online tool that allows you to convert audio channels between stereo (2 channels) and mono (1 channel). Whether you need to reduce file size by converting stereo to mono, or duplicate a mono recording to stereo format, our tool makes the conversion quick and easy.

Simply upload your audio file, select the desired channel configuration (mono or stereo), and download your converted file. Perfect for podcasters, voice actors, musicians, and content creators who need to adjust audio channel configurations.

Key Features

  • Stereo to Mono - Combine L+R channels into one
  • Mono to Stereo - Duplicate mono to both channels
  • Reduce file size - Mono files are smaller than stereo
  • Side-by-side comparison - Compare before/after
  • All formats supported - MP3, WAV, OGG, M4A, FLAC
  • Free to use - No registration required

How to Convert Between Stereo and Mono

  1. Upload your audio file - Select any audio file (MP3, WAV, OGG, M4A, FLAC).
  2. Choose channel configuration - Select Mono (1 channel) to convert stereo to mono, or Stereo (2 channels) to convert mono to stereo.
  3. Click "Convert Channels" - Our tool will process the audio using FFmpeg.
  4. Compare results - Listen to both original and converted versions side-by-side.
  5. Download - Get your converted audio file with the new channel configuration.

Stereo vs Mono: What's the Difference?

Stereo (2 Channels):
  • Two separate audio channels (Left and Right)
  • Creates spatial audio and depth
  • Larger file size (roughly 2x mono)
  • Ideal for music, ambient sounds, immersive audio
  • Requires stereo equipment to hear full effect
Mono (1 Channel):
  • Single audio channel (combined or single source)
  • No spatial separation
  • Smaller file size (about 50% of stereo)
  • Ideal for voice, podcasts, phone calls, audiobooks
  • Sounds identical on all speakers

When to Use Stereo to Mono Conversion

  • Podcasts and voiceovers - Voice recordings don't need stereo, mono reduces file size
  • Audiobooks - Mono is standard for spoken word content
  • Phone recordings - Phone systems typically use mono
  • Save storage space - Mono files are roughly half the size of stereo
  • Compatibility - Some older systems only support mono

When to Use Mono to Stereo Conversion

  • Platform requirements - Some platforms require stereo format
  • Mixing compatibility - Easier to mix stereo tracks together
  • Format standardization - Match other files in your project
  • Note: Converting mono to stereo doesn't create true stereo separation, it duplicates the mono signal to both channels
Pro Tip: For voice-only content like podcasts, interviews, or audiobooks, always use mono to save up to 50% file size without quality loss. For music production, keep stereo to preserve the spatial mix. When converting stereo to mono, FFmpeg intelligently combines both channels into one, preserving volume balance. When converting mono to stereo, the single channel is duplicated to both left and right channels - this doesn't create true stereo separation, but ensures compatibility with stereo-only systems and workflows!
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