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Mono to Stereo Converter

Convert single-channel (mono) recordings into a 2-channel stereo file so the sound plays in both headphone ears and is accepted by apps, distributors and editors that require stereo.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android

    Quality
    Advanced options

    How to use the Mono to Stereo

    1. 1

      Choose mono audio (or a video).

    2. 2

      Keep 'Same as input' or pick another format.

    3. 3

      Press Convert to get a stereo file.

    What this does (and doesn't)

    The mono signal is copied to both the left and right channels. The result sounds centred in both ears, which fixes recordings that only play in one ear. It does not invent a true stereo image from a mono source; no tool can do that.

    Frequently asked questions

    My recording only plays in the left ear — will this fix it?
    Yes, if the file is mono or 'dual mono'. Converting to stereo puts the sound in both ears.
    Does it reduce quality?
    Choose WAV or FLAC for zero loss. MP3 and M4A are re-encoded at the bitrate you choose.

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