M4A to WAV Converter

The M4A to WAV converter turns M4A audio (MPEG-4 audio container, normally AAC) into WAV (Waveform Audio File Format (RIFF, usually uncompressed PCM)) directly in your browser. WAV is the most compatible format for editors, DAWs and tools that cannot read M4A.

M4A is Apple’s default audio file type (iTunes, Apple Music downloads, Voice Memos) — more efficient than MP3 at the same bitrate. WAV is the editing and archiving standard — uncompressed, sample-accurate and supported by every audio application. Because M4A is already lossy, converting to WAV keeps the audio exactly as it sounds now but cannot restore detail that was removed when the M4A was made — expect a much larger file with the same quality.

Your file is decoded to 32-bit floating-point samples by the browser’s own audio decoder — and at the file’s own sample rate, not a resampled one. You can optionally resample or switch channels. It is then encoded to WAV on your device; for a lossy target the result is decoded again for the preview, so you hear what you will get. Typical size: about 10 MB per minute for 16-bit 44.1 kHz stereo.

Source format facts: M4A files are lossy; usual bandwidth: typically 20 kHz at 128–256 kbps. Target facts: WAV is lossless; usual bandwidth: full bandwidth up to the Nyquist limit.