Convert M4A to WAV.
Turn M4A audio and iPhone voice memos into uncompressed WAV that every editor, DAW and older player accepts. Converted with a local engine, private, and auto-deleted after 1 hour.
Why convert M4A to WAV
M4A is the AAC-in-an-MP4 container Apple uses for music and Voice Memos — efficient, but not every audio editor, sampler or older device reads it cleanly. WAV is the universal uncompressed format: drop it into any DAW, editor or CD-burning tool and it just works. It's the reliable handoff format when you're about to work with the audio.
Lossy source, honest expectations
One thing worth being clear about: M4A is lossy, so converting to WAV doesn't add back detail the AAC encoder threw away — it simply stops any further loss and gives you a clean, full-resolution PCM file to edit. That's the right move before editing (each lossy re-encode costs a little quality); it just isn't a quality upgrade.
Keep the size down afterwards
When you're finished editing and want a small archive copy, compress the WAV losslessly with WAV to FLAC, or make a shareable MP3.
How it works
- 01
Upload your M4A
Drop a file or pick one from your device. Private by default.
- 02
Convert with a local engine
M4A is decoded to WAV with ffmpeg — no paid API in the loop.
- 03
Download
Grab your WAV, ready for any editor or DAW.
Universal PCM WAV — opens in every editor, DAW and CD burner
Great for editing iPhone voice memos and recordings
Private uploads, auto-deleted after 1 hour
No watermark, no signup to try
Batch convert many at once, download as a zip
M4A to WAV: no added loss
WAV is a lossless format, so encoding into it adds no further quality loss. Note that if M4A was already lossy (like MP3 or AAC), detail discarded earlier can't be brought back — the WAV is faithful to the M4A, just larger.
Your file is ready. Want to do more with it?
Open this file in TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items — automatically.
Common questions
Is it free?+
Yes — convert M4A to WAV free, with no signup.
Is my file private?+
Uploads go to a private bucket, are converted, and auto-delete after 1 hour.
Does converting to WAV improve the quality?+
No — M4A is lossy (AAC), so anything the original encoding discarded is already gone and can't be restored. WAV keeps everything that's left with no further loss, which is exactly what you want before editing. It won't sound better, just fully compatible.
Why is the WAV so much bigger?+
WAV is uncompressed PCM, while M4A is compressed. Expect the WAV to be several times larger for the same audio.
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