# Convert M4A to AMR

> Convert M4A to AMR online for free in seconds. Files are processed in a secure, isolated sandbox and deleted automatically. No sign-up, no watermarks.

URL: https://www.converterrr.com/m4a-to-amr

- Runs in an isolated cloud sandbox with FFmpeg: files are deleted automatically, and the job uses cloud credits.
- Engines: FFmpeg (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "amr"` (paid plans).
- More: [Audio converter](https://www.converterrr.com/audio-converter), [M4A converter](https://www.converterrr.com/m4a-converter), [Compress M4A](https://www.converterrr.com/compress-m4a).

## How to convert M4A to AMR

1. **Add your M4A files.** Drag and drop M4A files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose AMR.** AMR is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4. **Download your AMR.** Download each AMR file, or everything at once as a ZIP.

## Good to know

- We encode at a high-quality bitrate by default. Pick a specific bitrate or sample rate under Options.
- M4A files are typically used for iTunes/Apple Music libraries and voice memos, while AMR is best for voice recordings from older phones.
- This conversion runs on FFmpeg in an isolated cloud sandbox. Files are encrypted in transit and deleted automatically.

## M4A vs AMR

|  | M4A | AMR |
| --- | --- | --- |
| Full name | MPEG-4 Audio | Adaptive Multi-Rate |
| Type | Audio | Audio |
| Extensions | .m4a | .amr |
| MIME type | audio/mp4 | audio/amr |
| Best for | iTunes/Apple Music libraries and voice memos | voice recordings from older phones |
| Properties | lossy compression | lossy compression, legacy format |

**M4A:** M4A is an audio-only MP4 file, usually containing AAC (or lossless ALAC). It's Apple Music's and Voice Memos' default format.

**AMR:** AMR is a speech codec used by mobile phones for voice recordings and calls.

The other way around: [convert AMR to M4A](https://www.converterrr.com/amr-to-m4a).

## Related conversions

- [AMR to M4A](https://www.converterrr.com/amr-to-m4a) (in the browser)
- [M4A to MP3](https://www.converterrr.com/m4a-to-mp3) (in the browser)
- [MP3 to AMR](https://www.converterrr.com/mp3-to-amr) (cloud)
- [M4A to WAV](https://www.converterrr.com/m4a-to-wav) (in the browser)
- [MP4 to AMR](https://www.converterrr.com/mp4-to-amr) (cloud)
- [M4A to FLAC](https://www.converterrr.com/m4a-to-flac) (in the browser)
- [WAV to AMR](https://www.converterrr.com/wav-to-amr) (cloud)
- [M4A to AAC](https://www.converterrr.com/m4a-to-aac) (in the browser)
- [MOV to AMR](https://www.converterrr.com/mov-to-amr) (cloud)
- [M4A to OGG](https://www.converterrr.com/m4a-to-ogg) (in the browser)
- [M4A to Opus](https://www.converterrr.com/m4a-to-opus) (in the browser)
- [WebM to AMR](https://www.converterrr.com/webm-to-amr) (cloud)

## Convert M4A to other formats

[M4A to MP3](https://www.converterrr.com/m4a-to-mp3), [M4A to WAV](https://www.converterrr.com/m4a-to-wav), [M4A to FLAC](https://www.converterrr.com/m4a-to-flac), [M4A to AAC](https://www.converterrr.com/m4a-to-aac), [M4A to OGG](https://www.converterrr.com/m4a-to-ogg), [M4A to Opus](https://www.converterrr.com/m4a-to-opus), [M4A to WMA](https://www.converterrr.com/m4a-to-wma), [M4A to AIFF](https://www.converterrr.com/m4a-to-aiff), [M4A to M4B](https://www.converterrr.com/m4a-to-m4b), [M4A to AC3](https://www.converterrr.com/m4a-to-ac3), [M4A to MP2](https://www.converterrr.com/m4a-to-mp2), [M4A to WEBA](https://www.converterrr.com/m4a-to-weba), [M4A to OGA](https://www.converterrr.com/m4a-to-oga), [M4A to MKA](https://www.converterrr.com/m4a-to-mka), [M4A to WV](https://www.converterrr.com/m4a-to-wv), [M4A to AU](https://www.converterrr.com/m4a-to-au), [M4A to TTA](https://www.converterrr.com/m4a-to-tta)

## Convert other formats to AMR

[MP3 to AMR](https://www.converterrr.com/mp3-to-amr), [MP4 to AMR](https://www.converterrr.com/mp4-to-amr), [WAV to AMR](https://www.converterrr.com/wav-to-amr), [MOV to AMR](https://www.converterrr.com/mov-to-amr), [WebM to AMR](https://www.converterrr.com/webm-to-amr), [FLAC to AMR](https://www.converterrr.com/flac-to-amr), [MKV to AMR](https://www.converterrr.com/mkv-to-amr), [AAC to AMR](https://www.converterrr.com/aac-to-amr), [AVI to AMR](https://www.converterrr.com/avi-to-amr), [OGG to AMR](https://www.converterrr.com/ogg-to-amr), [WMV to AMR](https://www.converterrr.com/wmv-to-amr), [Opus to AMR](https://www.converterrr.com/opus-to-amr), [WMA to AMR](https://www.converterrr.com/wma-to-amr), [FLV to AMR](https://www.converterrr.com/flv-to-amr), [M4V to AMR](https://www.converterrr.com/m4v-to-amr), [MPEG to AMR](https://www.converterrr.com/mpeg-to-amr), [3GP to AMR](https://www.converterrr.com/3gp-to-amr), [AIFF to AMR](https://www.converterrr.com/aiff-to-amr), [MPG to AMR](https://www.converterrr.com/mpg-to-amr), [TS to AMR](https://www.converterrr.com/ts-to-amr), [M4B to AMR](https://www.converterrr.com/m4b-to-amr), [MTS to AMR](https://www.converterrr.com/mts-to-amr), [VOB to AMR](https://www.converterrr.com/vob-to-amr), [M2TS to AMR](https://www.converterrr.com/m2ts-to-amr)

## M4A to AMR: frequently asked questions

### How do I convert M4A to AMR?

Drop your M4A file onto the converter above, make sure AMR is selected, and click Convert. When it's done, download the AMR file — it usually takes a few seconds.

### Is it safe to convert M4A to AMR here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

### Is the M4A to AMR converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

### Will converting M4A to AMR reduce quality?

AMR is a lossy format, but our defaults are tuned to be visually indistinguishable for most files. You can raise the quality under Options.

### Can I convert multiple M4A files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert AMR back to M4A?

Yes — use our AMR to M4A converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.