Free M4A (.m4a) to WAV (.wav) converter running entirely in your browser — with bitrate, sample rate and channel control. No upload, no signup.
MP3 · WAV · M4A · AAC · OGG · Opus · FLAC · WebM · AIFF
M4A is an MPEG-4 container that almost always holds AAC audio. It is what iPhones record, what Apple Music sells and what most modern devices prefer — AAC beats MP3 noticeably below 128 kbps.
Best for: Apple devices and modern streaming; convert for older hardware.
WAV stores uncompressed PCM samples: exactly what came off the converter, no encoder in the way. Files are large — roughly 10 MB per minute of CD-quality stereo — but editing, mastering and archiving all want that fidelity.
Best for: Editing, mastering and any workflow that must not re-compress.
Yes — unlimited, watermark-free and without an account. Conversion runs on your own machine, so there is no per-file cost to pass on.
No. Your browser decodes and re-encodes the audio locally; nothing is transmitted, which matters for voice notes, interviews and unreleased tracks.
WAV is uncompressed PCM, so the output is exactly what the decoder produced — nothing is thrown away. Files are large: roughly 10 MB per minute of CD-quality stereo.
Yes. Drop a whole batch — each file is processed in turn and the results can be downloaded individually or together as a ZIP.
M4A container tags, chapters and attached artwork are not exposed by the browser audio decoder. The WAV writer creates a fresh 16-bit PCM file containing audio samples only, so keep the source if those annotations matter.