How do I convert AMR to FLAC?

Add your AMR file to the upload area above, then press Convert. The FLAC 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 FLAC reduce quality?

No. FLAC 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 FLAC Converter

Turn AMR files into FLAC in a couple of clicks. Narrowband speech codec from mobile voice recordings. Lossless compression — CD quality at roughly half the size. 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 FLAC — 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 FLAC 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.

FLAC compresses audio losslessly, typically to about half the size of WAV. Decompressed, it is bit-for-bit identical to the original — the compression is mathematical, not perceptual.

Where AMR files come from: Voice memos and voicemail from older phones.
Where FLAC is used: Hi-fi music libraries and archival rips of physical media.

AMR vs FLAC

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

AMR compared with FLAC
Property	Source	Target
Compression	Lossy	Lossless
Introduced	1999	2001
Browser support	Poor. Convert to MP3 or WAV to use it.	Great on desktop and Android; iOS support is newer.

AMR is stronger at: Extremely small files. Adequate for speech intelligibility.
FLAC is stronger at: Lossless — provably identical to the source. Roughly half the size of WAV. Rich metadata and cover art support.

Why convert AMR to FLAC?

People make this switch when they run into the limits of AMR: always — convert to MP3 or WAV so the recording stays usable. FLAC is the better fit when archiving music you may want to re-encode later, or storing CD rips.

AMR limitations that prompt the switch: Terrible for music. Very limited playback support. Low sample rate ceiling.
What you give up: Much larger than MP3 or AAC. Not supported natively by all portable devices.

Does converting AMR to FLAC reduce quality?

Going from AMR to FLAC 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.