Convert M4A to WAV
Decode your M4A into an uncompressed WAV for editing, mastering, or any tool that needs raw PCM. This changes the container, not the sound, and it all happens in your browser.
Why convert M4A to WAV?
WAV is the interchange format for serious editing on Windows. If you are dropping a voice memo or an Apple Music export into Audacity, Adobe Audition, Pro Tools, or Reaper, a WAV loads cleanly with no on-the-fly AAC decoding in the way. It is also what you want for burning an audio CD or feeding hardware and software that only accept raw PCM. Because WAV carries no built-in compression, every sample sits right there for your tools to read and process. That is the practical reason to move an M4A into WAV: not better sound, but a file your DAW is happy to work with.
Quality and file size
Here is the honest part: converting a lossy M4A to WAV does not restore or improve anything the AAC encode already discarded. The converter decodes the compressed AAC to PCM and wraps it in a WAV, so you get the same sound you already had, now in an uncompressed form. The one guaranteed change is size. Expect roughly 10 MB per minute at CD quality, which is many times larger than the M4A. That extra size buys you an editing-friendly file, not a quality upgrade. Treat WAV here as the working format for your DAW, and keep the original M4A for listening.
M4A to WAV: common questions
Does converting to WAV improve the audio quality?
No. The audio was already encoded with lossy AAC, and WAV cannot bring back detail the M4A discarded. You get the same sound in an uncompressed, edit-ready container.
Why is the WAV so much bigger than my M4A?
WAV stores uncompressed PCM, roughly 10 MB per minute at CD quality. M4A uses AAC compression, so a large jump in size when you convert to WAV is normal and expected.
Does my file get uploaded to a server?
Never. Everything runs locally in your browser through FFmpeg compiled to WebAssembly. The M4A stays on your device, and we never upload, store, or see it.
When should I use WAV instead of the M4A?
Use WAV when you are editing in a DAW, burning a CD, or feeding software that only reads raw PCM. For everyday listening or storage, the smaller M4A is the better choice.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.