M4A → WAV · Free · No Upload
Free Online M4A to WAV Converter — No Installation
Convert M4A (AAC) to WAV (PCM) right in your browser, in seconds. Free, unlimited, and private: your file never leaves your device.
100% local processing: your file never leaves your device. Once the engine is ready, this tab can keep converting offline. Reopening or reloading offline may not work.
Supported formats:Files .m4a up to 300 MB — processed locally · Video and virtually any audio format are also accepted — we extract the audio automatically.
How it works
- 01
Upload the M4A file
Drag the .m4a file to the area above or click to select. Files up to 300 MB are accepted — everything is processed locally.
- 02
The conversion runs in your browser
FFmpeg (the same engine used by professionals) runs in WebAssembly right on the page. No bytes are sent to servers — total privacy.
- 03
Download the WAV
In seconds, the .wav file is ready for download, in standard 16-bit PCM, ready for any audio editor.
Frequently asked questions
Why convert M4A to WAV?
Older stereos, car radios, and some corporate systems won't open M4A — an iPhone voice memo arrives and no one can play it. Converting to MP3 or WAV makes the recording play anywhere. WAV is the WORKING format: lossless editing, accepted by every audio software, and what telephony/IVR systems usually require (8 kHz mono WAV).
Where do M4A files come from?
Typically from iPhone and iPad Voice Memos, voice recorder on recent Androids (Samsung, Motorola), recordings from meeting apps and music purchased on iTunes. MP4 container (brand M4A); typical AAC-LC at 128–256 kbps. Note: an .m4a may contain ALAC (lossless) instead of AAC — same extension, different codecs.
Is it worth using WAV?
WAV is the WORKING format: lossless editing, accepted by every audio software, and what telephony/IVR systems usually require (8 kHz mono WAV). Microsoft/IBM RIFF container (1991); 16-bit/44.1 kHz stereo is 10.1 MB/min; RIFF has a 4 GB ceiling — longer recordings use W64 or RF64.
Do I lose quality when converting M4A to WAV?
There is no additional loss: the WAV preserves exactly what exists in the M4A file. Keep in mind that the original quality of the M4A (which is already compressed) is the ceiling — converting to a lossless format does not "recover" quality.
What if I need a transcript of this audio?
After converting, you can transcribe the file with AI on VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification. Ideal for WhatsApp audio messages, meetings, and interviews.
Is my file sent to any server?
No. All processing is local (FFmpeg compiled to WebAssembly running on the page). The file never leaves your device—it even works offline after the page loads.
Is there a size or quantity limit?
The limit is 300 MB per file (browser memory). There is no limit on the number of uses. For larger files, VoxScriber processes them on the server with uploads up to 5 GB.
Need the text from this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.
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Tools
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OGG compresses well with high quality and is an open, royalty-free format—great for web and games.
Convert M4A to OPUS
Opus is the best quality-per-megabyte codec available today: perfectly intelligible speech at 16–24 kbps.
Convert MP3 to WAV
Leaving MP3 usually means needing WAV to edit without accumulating loss (recompressing MP3 degrades every generation) or a format required by a specific system — IVR/telephony wants 8 kHz WAV, iPhone ringtones want M4R.
Convert M4B to WAV
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Convert AAC to WAV
Raw .