Convert AMR to MP3, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your AMR file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert AMR to MP3
AMR (Adaptive Multi-Rate) is a compressed audio codec developed for mobile voice calls. It was the default recording format on Nokia and early Android phones, which is why it still turns up in voice memos recorded years ago. The codec is optimized for speech in the 300 Hz to 3400 Hz telephone frequency range, which means it sounds acceptable for voice but not for music or anything requiring wider frequency response.
Converting AMR to MP3 makes the recording playable on any modern device, since MP3 support is universal and AMR decoders are rare outside older phones. The conversion happens entirely in your browser, so the voice recording is never sent to a server. That matters for recordings that contain private conversations or sensitive information.
Upload the AMR file
Drop your .amr file onto the converter. AMR files are usually small (a few MB for several minutes of voice), so uploading is immediate even though no network transfer actually occurs.
Select MP3 bitrate
Because AMR captures only speech frequencies (up to about 3.4 kHz), there is no benefit choosing a bitrate above 64 kbps. The original audio contains no additional detail a higher bitrate could preserve.
Convert in browser
The WebAssembly decoder reads the AMR frames, decodes the speech-optimized audio, and re-encodes it as MP3. The process is fast; even a 30-minute voice memo typically converts in under a minute.
Download and save
Download the MP3. The audio quality will match the original AMR recording since MP3 at 64 kbps can capture everything the AMR codec encoded.
Frequently asked questions
Will the audio quality improve after converting to MP3?
No. The AMR format only captures telephone-band audio (up to about 3.4 kHz), and that limitation is baked into the original recording. Converting to MP3 does not add frequencies that were never recorded. The output will sound the same as the AMR file, but work in more players.
Is the voice recording uploaded to a server?
No. The conversion runs locally in your browser. The file never leaves your device.
My phone saved voice memos as .3ga files, not .amr. Will this work?
Files with a .3ga extension are typically AMR audio wrapped in a 3GPP container. Renaming them to .amr usually works. If the converter fails, try renaming the extension and re-uploading.
Can I batch-convert many AMR files at once?
This page handles one file at a time. For large batches, tools like FFmpeg can convert many AMR files in a single command: ffmpeg -i input.amr output.mp3.
What is the difference between AMR-NB and AMR-WB?
AMR-NB (Narrowband) samples up to 3.4 kHz and is the most common variant found in old voice memos. AMR-WB (Wideband, sometimes called HD Voice) extends to 7 kHz and sounds noticeably clearer. The converter handles both variants.