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Audio Format Converter

Convert audio files between MP3, WAV, M4A (AAC), OGG Vorbis, FLAC, and OPUS — including WAV to MP3, M4A to MP3, and MP3 to WAV. Batch-convert several files at once; FFmpeg WebAssembly does the work on your device, so nothing is uploaded.

How to use Audio Format Converter

  1. Pick the target format (and a bitrate for MP3, M4A, OGG, or OPUS).
  2. Drop in one or more audio files — mixed input formats are fine.
  3. Click Convert and download each converted file from the list.

Frequently asked questions

How do I convert WAV to MP3?
Choose MP3 as the target format and a bitrate, drop in your WAV files, and click Convert. Each file gets its own download button.
How do I convert M4A to MP3?
Add your M4A (AAC) files, pick MP3 as the output format, and download — handy for players that do not support M4A.
How do I convert FLAC to MP3?
Drop in the FLAC files, select MP3 and a bitrate (320 kbps preserves the most detail), and convert to a smaller, widely compatible file.
Are my audio files uploaded to a server?
No — FFmpeg runs as WebAssembly inside your browser, so files never leave your device.
Can I convert several files at once?
Yes — add as many files as you like; they are converted one after another and each gets its own download button.
Which conversion should I pick?
MP3 for maximum compatibility, WAV for editing, M4A for Apple devices, OPUS for the smallest size at a given quality, FLAC for lossless archiving, and OGG for open-source projects.
Does converting between lossy formats lose quality?
Re-encoding lossy audio (e.g. MP3 to OGG) always loses a little quality. When you care about fidelity, convert from a lossless source (WAV/FLAC) or pick a higher bitrate.

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