AMR
AMR audio
AMR is a speech codec from the GSM era. Voice recorders and call recordings on older phones saved it. It sounds like a phone call and most modern apps cannot open it.
Opens in Older phones and VLC; few desktop players
AMR converterAMR to M4R converter, without the upload.
Turn AMR voice recordings into M4R. It is converted in your browser, so the file never leaves your device.
Drop AMR files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Convert to
- On your device · nothing is uploaded
- No account, no email
- Batch and ZIP download
- Free
- M4R: first 40 s
How to convert AMR to M4R
Add your AMR voice recordings
Drop AMR files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
M4R is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Download
Save the M4R, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The AMR to M4R converter is part of this page and runs inside your browser. Your voice recordings are never sent to ToAny or to anyone else.
No upload, no queue
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
Free, without an account
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
AMR to M4R: what to expect
AMR does not open in most apps and browsers. M4R is the only format an iPhone accepts as a custom ringtone. AMR is at home in voice recordings on older phones; M4R is the usual choice for custom iPhone ringtones and alert tones. Both formats are lossy, so the content is compressed a second time; start from the best copy you have.
The defaults suit most files. Under Options you can choose the bitrate and trim the start and end.
This pair uses the compatibility engine, ffmpeg built for the browser, because AMR is not handled by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB. An iPhone ringtone is limited to 40 seconds, so only 40 seconds are kept, from the start point you set under Options (the beginning by default). M4R is written at 192 kbps unless you choose another bitrate.
AMR vs M4R
M4R
iPhone ringtone
An M4R file is an M4A with a different extension, which is how an iPhone recognises it as a ringtone. Ringtones are limited to about 40 seconds.
Opens in iPhone (as a ringtone), iTunes, Apple Music, GarageBand
M4R converter| AMRAMR audio | M4RiPhone ringtone | |
|---|---|---|
| Stands for | Adaptive Multi-Rate | iPhone ringtone |
| Type | Audio | Audio |
| Compression | Lossy, tuned for speech | Lossy (AAC) |
| Introduced | 1999, by the 3rd Generation Partnership Project | 2007, by Apple |
| Opens in | Older phones and VLC; few desktop players | iPhone (as a ringtone), iTunes, Apple Music, GarageBand |
| Best for | Voice recordings on older phones | Custom iPhone ringtones and alert tones |
| File extension | .amr, .awb, .3ga | .m4r |
Questions
Are my voice recordings uploaded anywhere?
No. The AMR to M4R conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Does converting AMR to M4R reduce quality?
M4R is a lossy format, so a small amount of detail is traded for a smaller file. At the default setting the difference is hard to notice. You can choose the bitrate under Options.
Can I convert several AMR files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert AMR to M4R on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the AMR file, press Convert and save the M4R. There is nothing to install.
Is there a file size limit?
Yes. AMR to M4R runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.