Audio to M4A
Free online conversion of AC3, FLAC, MP3, OGG, OPUS, PCM, WAV to M4A
Convert any audio to M4A online
M4A is the AAC-based format used by iTunes, Apple Music and most podcasts. It delivers better sound than MP3 at the same bitrate, making it the natural choice for the Apple ecosystem. This free tool converts MP3, WAV, FLAC, OGG, OPUS and more to M4A right in your browser.
Better quality than MP3 at the same size
AAC, the codec inside M4A, is more efficient than MP3 — a 128 kbps M4A generally sounds cleaner than a 128 kbps MP3. That efficiency makes M4A ideal for music libraries, audiobooks and podcasts where you want quality without large files.
Runs in your browser, files stay private
Conversion happens entirely on your device with WebAssembly — nothing is uploaded. No sign-up, no watermark and no file limit, and you can set the bitrate to balance M4A quality against size.
Frequently asked questions
How do I convert audio to M4A?
Open the tool, drop in your MP3, WAV, FLAC, OGG or OPUS file, keep M4A as the output and click convert. The M4A is produced in your browser and downloads immediately.
Why convert to M4A?
M4A uses the AAC codec, which sounds better than MP3 at the same bitrate and is the native format for iTunes, Apple Music and most podcast apps, so it is the best choice in the Apple ecosystem.
Is the audio to M4A converter free?
Yes, completely free with no sign-up, no watermark and no limit on the number or size of files you convert.
What is the difference between M4A and MP3?
Both are lossy, but M4A (AAC) is more efficient, so it generally sounds better at the same bitrate. MP3 has slightly broader device support, while M4A is preferred on Apple devices.
Are my audio files uploaded to a server?
No. All processing runs locally in your browser, so your audio never leaves your device.