How to convert M4A to MP3 on Android
The SERP for this is APK aggregators and store listings rather than working answers. The searcher wants the file converted, and probably does not realise the top results are asking them to sideload software from a mirror.
Android has no built-in audio converter. Files by Google plays an .m4a perfectly well but cannot save it as anything else, and neither can Samsung's My Files. The quickest fix is to open the M4A to MP3 converter in Chrome, pick the file, and save the MP3 straight into your Downloads folder — no install, no account, and the file is never sent anywhere, because the encoder runs inside the browser tab on a file the browser reads off your own storage. If the recording is long, or you are on mobile data, or you are somewhere with no signal at all, an installed app is the better call and there is a section on that below.
One thing no route on this page can do: get back what the AAC encoder inside the M4A already threw away. M4A to MP3 decodes one lossy format and compresses into another. Pick 192 kbps and stop thinking about it.
Convert it in Chrome, with nothing installed
This works in Chrome, Firefox, Samsung Internet and Edge on Android. The steps are the same in all four.
- Open the converter. The first visit fetches a 32 MB engine, which is then cached for a year — see the note on mobile data further down.
- Tap the drop zone. Android shows its own picker, usually with Camera, Recorder and Files as choices. Tap Files.
- In the picker, tap the ☰ menu at the top left if you cannot see your storage. That menu is where Downloads, Audio, Drive and your phone's internal storage are hiding. Recent files are the default view and often do not include what you want.
- The converter reads the file's codec, length and bitrate and tells you what it found before you choose anything. If your
.m4aturns out to be Apple Lossless rather than AAC, it will say so. - Choose MP3 and a bitrate, then convert. Save the result when the browser offers it.
Expect the conversion to take a real fraction of the recording's length rather than a fingersnap. It is single-threaded WebAssembly on a phone chip, so a three-minute song is quick and a ninety-minute lecture is long enough to put the kettle on. M4A to MP3 can never be a stream copy — the audio has to be decoded and re-encoded, unlike an M4A to M4R ringtone, where the same AAC stream is simply rewrapped and the job finishes in about a second.
Android is aggressive about reclaiming memory from background tabs. Switch to another app mid-conversion on a phone that is short on RAM and Chrome may discard the tab and start you over. Leave the screen on and the tab in the foreground until the file is saved. Android's own screen timeout does not matter — locking the screen does.
Where the converted file lands
Chrome saves to the Download folder on internal storage — the full path is /storage/emulated/0/Download, though almost nothing on Android shows you that. Three ways to find it again:
- The download notification that appears when the save finishes. Tap it and Android opens the file in whatever player you have.
- Chrome's own list: ⋮ > Downloads.
- Files by Google > Downloads, or on a Samsung, My Files > Internal storage > Download.
If Chrome keeps asking where to put things, or never asks and you wish it would, the toggle is in Chrome > ⋮ > Settings > Downloads, along with the download location itself. On a phone with an SD card that setting is worth checking before you convert something large.
If the file is stuck in Gmail, Drive or a chat
Most M4A files on an Android phone arrived from somewhere else, and the picker cannot always see them where they are.
- Gmail attachment: tap the download arrow on the attachment chip rather than the preview. It lands in Downloads and the picker finds it.
- Google Drive: the picker can reach Drive through its ☰ menu, but a file that is not available offline has to be fetched first, which is slow and occasionally fails silently. Downloading it in the Drive app first is more reliable.
- WhatsApp: a file someone sent as a document sits in
Internal storage > Android > media > com.whatsapp > WhatsApp > Media > WhatsApp Audio. Opening it from inside the chat and using Share > Save to Files is less painful than navigating there. - Your own recordings: Samsung's Voice Recorder writes
.m4aby default, which is why so many people meet this problem without ever touching an iPhone.
A word on the APK mirrors ranking above this page
Search for an Android audio converter and a good slice of the first page is APK mirror sites offering a "mod", "premium unlocked" or "pro" build of some converter. Those are repackaged binaries from an unknown party, and audio conversion is exactly the kind of app that asks for broad storage access to do its job — which makes it exactly the kind of app you do not want a stranger's build of.
Installing from a mirror means granting Install unknown apps to your browser or file manager, a permission that stays granted afterwards. Play Protect will scan the package and may warn you, and Android 14 and later refuse outright to install apps built against very old API levels — which many mirrored builds are. There is no update path, so a security fix in the real app never reaches you. None of this is theoretical caution; it is the ordinary failure mode of a category where the searcher only wants one file converted.
If you want an app, install it from Google Play. If you want the file converted in the next two minutes, the browser tab does it without installing anything at all.
When an installed app is genuinely better
Three situations where the browser is the wrong tool, and they are all about the phone rather than the file.
| Your situation | Better route | Why |
|---|---|---|
| Metered or slow mobile data | Installed app | The browser converter fetches a 32 MB engine on first use. An app has its encoder already. |
| Aeroplane, tube, no signal | Installed app | Works with nothing to connect to, once installed. |
| You convert files most weeks | Installed app | A history list means a finished file can be shared again later without redoing the job. |
| One or two files, on wi-fi | Browser tab | Nothing installed, nothing to uninstall, more output formats. |
| A locked-down work phone | Browser tab | No install permission needed. |
| Editing as well as converting | Either | Trimming, merging and fades exist on both sides. |
Our own Audio Converter - m4a to mp3 is on Google Play, but Android 1.0 does not yet accept M4A input: its verified native conversion path accepts MP3 or WAV and writes MP3. Use the browser converter above for this specific M4A-to-MP3 job. The Android app is free to download and has no Pro tier, subscription prompt or conversion limit; its editing tools, recorder and player are unrestricted too. The iOS app keeps its separate subscription model. The longer comparison, including what a browser tab does that no app on either store does, is in app or browser: which audio converter you actually want.
Doing several files at once
Honestly: a phone is the wrong place for a batch. The browser converter takes one file at a time, and even an app that queues files is working through them on a chip that throttles when it warms up. Twenty voice memos on an Android handset will take longer than the same twenty on any laptop made in the last decade, and the phone will be hot at the end of it.
If the files are already backed up to Drive or OneDrive, the pragmatic answer is to convert them on a computer later and leave the phone to whatever you need now. If they are only on the phone and there is no computer coming, convert the two or three you actually need and leave the rest as M4A — most things that play audio on Android handle AAC without complaint, and converting a file nobody will open costs you a generation of quality for nothing.
There is no per-file size limit imposed by the converter. The ceiling is the browser's own address space, which tops out near 2 GB, and on a phone the practical limit arrives well before that. Audio rarely gets close: three hours at 128 kbps is about 170 MB, and a spoken-word recording at 64 kbps mono is roughly half a megabyte per minute.
Sharing the MP3 into WhatsApp, Drive or email
Once the MP3 is in Downloads it is an ordinary file, and Android's share sheet treats it as one. Long-press it in Files by Google and tap Share.
Two things to know before you send it. First, WhatsApp's Document attachment sends the MP3 through as a file, while a voice note is a different thing entirely — WhatsApp records those in Opus, which is why an exported chat is full of .opus files rather than MP3s. Second, Gmail attachments are capped at 25 MB, and past that Gmail switches to a Drive link without asking. An hour of speech at 192 kbps is well over that cap, and dropping to 64 kbps mono for a voice recording brings it comfortably under with no audible cost on speech. Getting an audio file small enough to email works through the numbers.
If the file is going to a transcription service, check what it wants before converting at all. Several accept M4A directly, and every conversion you skip is a generation of quality you keep.
The converter on the home page handles this. Free, no upload, no sign-up.