Convert M4A to WAV
Convert M4A to WAV right in your browser — free, private, nothing is uploaded. Get a lossless file any editor opens — no further quality loss.
Convert M4A to WAV →Free · Private — runs in your browser, nothing is uploaded
M4A wraps AAC audio in an MPEG-4 container — the format iTunes and Apple Music use. AAC squeezes better quality than MP3 out of the same bitrate, at the cost of slightly narrower support.
WAV stores raw, uncompressed PCM samples — the audio equivalent of a bitmap. Files are huge, but every editor, DAW and operating system opens them without a second thought.
Converting M4A to WAV is about compatibility rather than quality: some editors, DAWs and pipelines simply insist on WAV. You get a file they open natively — but the audio can never get better than the M4A you start from.
M4A vs WAV
| M4A | WAV | |
|---|---|---|
| Compression | lossy — some detail traded for size | lossless — nothing discarded |
| Codec / container | AAC audio in an MPEG-4 container | uncompressed 16-bit PCM in a RIFF container |
| Typical file size | small — like MP3, often better quality per byte | very large — roughly 10 MB per minute of 16-bit stereo |
| Best for | Apple devices and small high-quality files | editing, DAWs and audio production |
| Strength | better quality than MP3 at the same bitrate | universal uncompressed PCM — ideal for editing |
| Watch out for | slightly less universal than MP3 | huge files for what they hold |
| Compatibility | excellent on Apple devices; broad elsewhere | universal — opens in every editor and OS |
How the conversion works
- Choose your M4A file (up to 10 MiB). The button above opens the converter with WAV already selected as the target format.
- There is no bitrate to choose: WAV is lossless, so the bitrate field is simply ignored.
- Run the conversion and download the result — the output keeps your filename with a .wav extension. Everything happens locally: the page runs ffmpeg compiled to WebAssembly, so your audio is never uploaded to a server.
What to expect
No quality is restored. WAV preserves exactly what's in your M4A file — detail the M4A encoder already discarded is gone for good. Expect a much larger file with identical sound; convert because a tool needs WAV, not to upgrade the audio.
Embedded album art is dropped along the way: cover images ride along as a video stream, which audio-only outputs like WAV can't carry.
FAQ
Does converting M4A to WAV improve the audio quality?
No. WAV preserves exactly what's in the source — detail the M4A encoder already discarded is gone for good. Convert because a tool needs WAV, not to upgrade the sound.
Why is the WAV file so much larger than my M4A?
M4A stores heavily compressed audio; WAV expands it to raw PCM (about 10 MB per minute of stereo) — so the same sound takes several times the space. That's normal, and the extra bytes don't add quality.
Is my M4A file uploaded when converting to WAV?
No. The page downloads an ffmpeg WebAssembly build once, then converts your file locally in the browser tab — the audio never leaves your device. Input files up to 10 MiB are supported.