M4A to WAV Converter
Runs in your browser — your files are never uploaded.
Convert M4A audio to uncompressed WAV. Editors, samplers and DAWs work most reliably with plain PCM, and some older recording software will not open an M4A at all. This decodes the AAC audio and writes standard 16-bit PCM. Runs entirely in your browser using a real build of ffmpeg.
How to convert M4A to WAV
- 1
Drop your .m4a file onto the box, or click to choose one.
- 2
OkConverter loads the conversion engine (one-time per session) and decodes to PCM.
- 3
Click “Download” to save the .wav file.
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Frequently asked questions
Why is the WAV so much bigger?+
WAV stores every sample uncompressed, about 10 MB per minute in stereo. That is normal and it is the point — nothing is compressed, so editors can seek and process it without decoding overhead.
Does this improve the audio quality?+
No. It converts the audio to a lossless container, but whatever AAC discarded originally stays gone. What it does guarantee is no further loss during editing.
What format is the output exactly?+
16-bit signed PCM at the source file’s original sample rate — the standard WAV flavour every editor accepts.
Is my file uploaded anywhere?+
No. Once the engine has loaded, decoding happens entirely inside your browser tab.