Convert M4A to MP3 Online
Convert M4A to MP3 online — no software to install, nothing to configure. The converter runs inside your browser tab and works on any device you're reading this on.
Drop your M4A file here or click to browse
M4A (.m4a) · Max 20 MB
'Online converter' used to mean uploading your file to someone's server and waiting for a download link. This one works differently: the page loads FFmpeg compiled to WebAssembly into your browser, and the conversion happens on your own machine. You get the convenience of online — no install, works everywhere, always up to date — without the upload, the queue, or your recording sitting on a stranger's server.
That difference is measurable. There is no upload time (a 20 MB M4A on a slow connection can take minutes just to send to a server-based converter), no waiting behind other users, and no download round-trip — the MP3 is written directly in your browser and saved straight to disk. A typical voice memo converts in a couple of seconds.
Because it is browser-based, the same page works on a Mac, a Windows PC, a Linux machine, an iPhone in Safari, or an Android phone in Chrome. There is nothing to keep updated and nothing that can bundle adware — two chronic problems with downloadable free converters.
M4A to MP3 specifically is the classic cross-ecosystem conversion: M4A is what Apple devices produce, MP3 is what everything on earth plays. Converting online means you can do it from whichever device currently holds the file — including converting an iPhone voice memo directly on the iPhone.
Privacy note for anything sensitive: since processing is local, interviews, meetings, and personal recordings never transit the network. You can even load the page, go offline, and the converter keeps working — proof there is no server involved.
Frequently Asked Questions
Is this online converter safe for private recordings?
Yes — unusually so for an 'online' tool. The conversion runs locally in your browser via WebAssembly; the M4A is never uploaded. You can disconnect from the internet after the page loads and it still converts, which no server-based converter can do.
How long does an online M4A to MP3 conversion take?
Seconds. There is no upload or download round-trip — a typical voice memo converts in 1-3 seconds, and even long recordings are limited only by your device's speed, not a server queue.
Does it work on my phone's browser?
Yes — Safari on iOS 15.4+ and Chrome on Android both run the converter fully. You can convert an iPhone voice memo on the iPhone itself and save the MP3 to the Files app.
Online vs desktop software — which is better for M4A to MP3?
For occasional conversions, online wins: nothing to install or update, no adware risk, works on every OS. Desktop tools only make sense for huge batch jobs. This converter gives online convenience with local-processing privacy — the best of both.
Do I need a fast internet connection?
No — only enough to load the page once (a few seconds). The conversion itself uses zero bandwidth because the file never leaves your device.
About M4A
Apple's preferred audio format. Better quality than MP3 at same bitrate. Default for iTunes and Apple devices.
About MP3
The most widely used audio format. Great compatibility, small file size. Ideal for music, podcasts, and general use.