FormatDrop
How-To Guide

How to Convert M4A to WAV

M4A files (AAC audio in an MPEG-4 container) are excellent for storage and streaming but can't be imported directly into many professional audio editors like Pro Tools, Audacity, or hardware samplers. WAV is the universal exchange format for audio editing — uncompressed, losslessly decodable, and accepted everywhere. Converting M4A to WAV expands the compressed audio back to PCM for full editing flexibility.

Open M4A to WAV Converter

Step-by-step instructions

  1. 1

    Upload your M4A file

    Select your .m4a file. Whether it's an iTunes purchase, a voice memo, or a podcast file, the converter reads the AAC stream and decodes it to uncompressed PCM.

    Go to converter
  2. 2

    Choose WAV as output format

    Select WAV. The output is 16-bit or 24-bit PCM at the source sample rate (typically 44.1 kHz or 48 kHz). If your M4A was originally mastered from a higher-res source, 24-bit WAV preserves headroom for editing.

  3. 3

    Import into your audio editor

    Open the WAV in Audacity, Logic Pro, Pro Tools, Adobe Audition, or any DAW. WAV has no licensing restrictions and no decoding overhead — your editor reads it directly from disk.

Why convert M4A to WAV?

M4A is great for your music library; WAV is essential for your studio. Converting lets you take any track into a professional editing workflow without quality compromises beyond what AAC already introduced.

Your files never leave your device

FormatDrop runs the conversion engine entirely inside your browser using WebAssembly. No file upload. No server. Nothing stored. You can verify this by opening DevTools → Network tab and watching: zero upload requests.

Frequently asked questions

Will M4A to WAV conversion lose quality?
Decoding AAC to WAV is lossless from the AAC's perspective — all samples are decoded accurately. However, AAC is itself a lossy codec: the original encoding from PCM to AAC lost information. You cannot recover what was lost in the original AAC encoding. The WAV is a perfect uncompressed copy of what the AAC stores.
FFmpeg command for M4A to WAV?
`ffmpeg -i input.m4a -c:a pcm_s16le output.wav`. For 24-bit WAV: `ffmpeg -i input.m4a -c:a pcm_s24le output.wav`.
My M4A is protected (DRM) — can I convert it?
DRM-protected M4A files (iTunes purchases before 2009) cannot be converted by any tool without authorization. If you purchased the track, re-download it from Apple Music as a DRM-free AAC file (Apple dropped DRM in 2009). Circumventing DRM is illegal in most jurisdictions.
The WAV file is huge — is that normal?
Yes. WAV is uncompressed PCM: 1 minute of stereo 44.1 kHz 16-bit audio = ~10 MB. A 3-minute M4A of ~3 MB will expand to ~30 MB as WAV. This is expected — WAV trades file size for maximum compatibility and editability.
Convert M4A to WAV Now — Free

No account. No upload. Works in any browser.

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