M4A → MP3 · Free · No Upload · No Signup
Free Online M4A to MP3 Converter — No Installation Needed
Convert M4A to MP3 directly 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 page loads, it even works offline.
Supported formats:.m4a files 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 and drop your .m4a file onto the area above or click to select. Accepts files up to 300 MB — all processed locally.
- 02
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 MP3
In seconds, the .mp3 file is ready for download, with 190 kbps (VBR) quality — ideal for voice and music.
Frequently asked questions
Why convert M4A to MP3?
iPhone (Voice Memos) and Mac recordings come out as M4A — converting to MP3 ensures universal compatibility.
What if I need the text from 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 audios, meetings, and interviews.
Is the Free Online M4A to MP3 Converter really free?
Yes, free and unlimited. Processing happens in YOUR browser (WebAssembly), so we have no server cost — and you don't need to create an account.
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's no limit on the number of uses. For larger files, VoxScriber processes on the server with uploads up to 5 GB.
Does it work on mobile?
Yes — any modern browser (Chrome, Safari, Firefox, Edge) on desktop or mobile. On older phones, large files may take longer.
Need the text from this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.