Convert WAV to M4A
Convert WAV to M4A right in your browser — free, private, nothing is uploaded. Pick a bitrate (32–320 kbps) and shrink the file dramatically.
Convert WAV to M4A →Free · Private — runs in your browser, nothing is uploaded
WAV stores raw, uncompressed PCM samples — the audio equivalent of a bitmap. Files are huge, but every editor, DAW and operating system opens them without a second thought.
M4A wraps AAC audio in an MPEG-4 container — the format iTunes and Apple Music use. AAC squeezes better quality than MP3 out of the same bitrate, at the cost of slightly narrower support.
Converting WAV to M4A trades a sliver of fidelity for a dramatic drop in size: a WAV recording that hogs storage becomes an M4A file you can email, message or stream. It's the classic move for sharing voice memos, publishing spoken audio and fitting a music library onto a phone.
WAV vs M4A
| WAV | M4A | |
|---|---|---|
| Compression | lossless — nothing discarded | lossy — some detail traded for size |
| Codec / container | uncompressed 16-bit PCM in a RIFF container | AAC audio in an MPEG-4 container |
| Typical file size | very large — roughly 10 MB per minute of 16-bit stereo | small — like MP3, often better quality per byte |
| Best for | editing, DAWs and audio production | Apple devices and small high-quality files |
| Strength | universal uncompressed PCM — ideal for editing | better quality than MP3 at the same bitrate |
| Watch out for | huge files for what they hold | slightly less universal than MP3 |
| Compatibility | universal — opens in every editor and OS | excellent on Apple devices; broad elsewhere |
How the conversion works
- Choose your WAV file (up to 10 MiB). The button above opens the converter with M4A already selected as the target format.
- Pick a bitrate between 32 and 320 kbps — the default 192 kbps is transparent for most material, and values outside the range are clamped.
- Run the conversion and download the result — the output keeps your filename with a .m4a extension. Everything happens locally: the page runs ffmpeg compiled to WebAssembly, so your audio is never uploaded to a server.
What to expect
This step is lossy. The bitrate decides how much detail the M4A keeps: 192 kbps (the default) is transparent for most music, 128 kbps suits voice recordings, and 256–320 kbps is the choice for archiving. Your WAV original keeps every sample, so hold on to it.
Embedded album art is dropped along the way: cover images ride along as a video stream, which audio-only outputs like M4A can't carry.
FAQ
How much quality do I lose converting WAV to M4A?
At the default 192 kbps, M4A is transparent for most listeners and most material — you'd struggle to tell it from the WAV original. Push the bitrate to 256–320 kbps for archiving, or drop to 128 kbps for voice recordings where size matters most.
What bitrate should I pick for the M4A file?
The converter accepts 32–320 kbps and defaults to 192 kbps, which is a good balance for music. Use 128 kbps for voice where size matters and 256–320 kbps for archiving. Values outside the range are clamped.
Is my WAV file uploaded when converting to M4A?
No. The page downloads an ffmpeg WebAssembly build once, then converts your file locally in the browser tab — the audio never leaves your device. Input files up to 10 MiB are supported.