AMR to MP3 converter online — free
Quick answer Turn an .amr voice recording from an older phone or call recorder into an MP3 that plays on any device.
Change format and bitrate. Accepts MP3, WAV, OGG, M4A, FLAC, AAC, Opus, AMR and WMA — 15MB max (Pro: 20MB). Use a preset for common jobs.
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Convert AMR to MP3 online for free with VoxCraft. Upload an .amr file, keep MP3 selected, and download a file that plays in any player or editor — no install and no signup on the free tier.
AMR (Adaptive Multi-Rate) is a speech codec designed for phone calls. Older Android and feature phones, some call-recording apps and a few voice recorders still save .amr files. It produces very small files, but most computers, editors and websites don't open it.
Because AMR was built for telephone speech, the audio is typically narrowband — it sounds like a phone call. Converting to MP3 won't add detail that was never recorded, but it makes the recording usable: you can play it, trim it, clean it up and share it.
A good next step for a muffled recording is noise reduction and then normalize to bring the level up.
How it works
- Upload your .amr file (15MB max, 20MB with Pro).
- Leave the output format on MP3. 128 kbps is more than enough for speech this narrow.
- Tap Convert and wait a few seconds.
- Download the MP3 and open it anywhere.
Who uses this
Old phone recordings
Rescue voice memos and call recordings stored as .amr on an old handset or memory card.
Evidence and notes
Make a recording playable on a computer so it can be reviewed, trimmed or transcribed.
Interviews and lectures
Convert a lecture recorded on a basic voice recorder into a standard file.
Tips for better results
- AMR audio is low-bandwidth speech; expect it to sound like a phone call even after conversion.
- Quiet recordings usually benefit from normalizing after conversion.
- Want the words? After converting, run it through Transcribe.
- Keep the original .amr file in case you need it later.
Frequently asked questions
What is an AMR file?
AMR stands for Adaptive Multi-Rate, a codec made for compressing speech on mobile networks. It is common in older phone voice recorders and some call-recording apps.
Why can't I open my .amr file?
Most desktop players and editors don't include an AMR decoder by default. MP3 opens almost everywhere.
Will the sound improve after converting?
No. Conversion changes the format, not the recorded detail. Noise reduction and normalizing can make speech clearer.
What file size can I upload?
Free accounts can upload up to 15MB per file; Pro allows up to 20MB. AMR files are tiny, so this is rarely a problem.
Is it free?
Yes within free-tier limits, with no account required to start.
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