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Audio Converter

Convert M4A, WAV, AAC, or OGG to MP3, or MP3 to WAV — right in your browser. No upload, no sign up, completely free.

Your audio is converted entirely on your device — it never leaves your browser or touches a server.

Drop an audio file here, or click to choose

MP3, WAV, M4A, AAC, or OGG → convert to MP3 or WAV

How the Audio Converter works

This tool decodes your audio and re-encodes it using your browser’s own audio engine plus an open-source MP3 encoder — entirely on your device. Nothing is uploaded to a server — your audio never leaves your browser.

Best for

  • Converting an iPhone voice memo (M4A) to MP3 for wider compatibility
  • Converting WAV recordings down to MP3 for smaller, shareable files
  • Getting a lossless WAV from a compressed MP3 source for editing

Good to know

  • Converting into M4A/AAC isn’t supported — there’s no clean, lightweight, freely licensed encoder for that format in the browser, so this tool only outputs MP3 or WAV
  • Which source formats decode successfully depends on your browser’s built-in audio support, which covers MP3, WAV, M4A, AAC, and OGG in virtually all modern browsers
  • Very large files take longer since encoding runs on your device rather than a server
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