How do I convert AMR to AIFF?

Add your AMR file to the upload area above, then press Convert. The AIFF file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to AIFF reduce quality?

No. AIFF is a lossless format, so the conversion preserves exactly what is in your AMR file. Note that it cannot recover detail that was already discarded when the AMR was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 300 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

AudioLosslessRuns in your browser

AMR to AIFF Converter

Turn AMR files into AIFF in a couple of clicks. Narrowband speech codec from mobile voice recordings. Apple's uncompressed audio counterpart to WAV. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

AMR files (.amr) · up to 300 MB each

or paste files from your clipboard

Ready when you are

Drop a AMR file above and FileTools360 will turn it into AIFF — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your AMR files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control bitrate, sample rate and channels and start and end times.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

AMR and AIFF explained

AMR is a narrowband speech codec designed for mobile phone calls. It is optimised specifically for the frequency range of the human voice and sounds poor for anything else.

AIFF is Apple's uncompressed audio format, functionally equivalent to WAV but with better metadata support and big-endian byte order.

Where AMR files come from: Voice memos and voicemail from older phones.
Where AIFF is used: Mac audio production and older Apple software.

AMR vs AIFF

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

AMR compared with AIFF
Property	Source	Target
Compression	Lossy	Uncompressed
Introduced	1999	1988
Browser support	Poor. Convert to MP3 or WAV to use it.	Strong on Apple, decent elsewhere.

AMR is stronger at: Extremely small files. Adequate for speech intelligibility.
AIFF is stronger at: Uncompressed and lossless. Better metadata handling than WAV. Standard in Mac audio workflows.

Why convert AMR to AIFF?

People make this switch when they run into the limits of AMR: always — convert to MP3 or WAV so the recording stays usable. AIFF is the better fit when audio production on a Mac.

Be aware of the size trade-off: AIFF is uncompressed, so expect the converted file to be considerably larger than the AMR you started with.

AMR limitations that prompt the switch: Terrible for music. Very limited playback support. Low sample rate ceiling.
What you give up: Very large files. Less universally supported than WAV.

Does converting AMR to AIFF reduce quality?

Going from AMR to AIFF moves already-compressed data into a format that stores it exactly. Nothing is lost from this point on, but nothing is recovered either — the detail AMR discarded when the file was first created is gone permanently. Expect a noticeably larger file for identical visual quality.