Convert AMR to M4A
AMR is great for call recordings and voice memos from older phones, but M4A is the better choice for high-quality music and voice recordings for Apple and Android devices. Convert AMR to M4A in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert AMR to M4A
- 1
Tap Choose files and select one or more AMR files (or drag them in).
- 2
Check that M4A is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your M4A downloads automatically. Converting several files? Grab them all as a ZIP.
AMR vs M4A
Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| AMR | M4A | |
|---|---|---|
| Full name | Adaptive Multi-Rate | MPEG-4 Audio (AAC) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | 3GPP / Ericsson | Apple / MPEG |
| Introduced | 1999 | 2001 |
| Plays on iPhone | ✕ No | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ◐ Partly / with an app | ✓ Yes |
| Plays on Mac | ✕ No | ✓ Yes |
About AMR and M4A
AMR: AMR is a speech codec made for mobile phones. Older Android and Nokia phones, call recorders and voice-memo apps save recordings as .amr files, which many computers cannot open.
M4A: M4A is an MPEG-4 container holding AAC audio. It sounds better than MP3 at the same size and is the default format for iPhone voice memos, Apple Music downloads and many Android recorders.
Frequently asked questions
How do I convert AMR to M4A on my phone?
Will converting AMR to M4A reduce quality?
Is this AMR to M4A converter free?
Are my files uploaded to a server?
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