Convert AMR to MP3
The old phone's voice format, translated for everything — converted privately on your own device.
Drop your video or audio here
or
MP4, MOV, WebM, MKV, AVI, MP3, WAV and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
AMR is the sound of older phones: voice memos, call recordings, and notes saved by feature phones and early Android recorders. The format was built for tiny files over 2G networks — and almost nothing today will play it. The recordings still matter; the format is the only problem, and MP3 solves it for good.
AMR predates what browsers decode natively, so the conversion runs on the site's built-in engine — it loads once on first use, then handles the format's narrow-band voice data properly. Personal recordings never upload anywhere: the file is read and the MP3 written entirely on your device.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Convert
Compatible files are repackaged instantly with zero quality loss; others are hardware-transcoded at high quality.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Why does the MP3 sound narrow or "telephone-like"?
That is the recording, not the conversion — AMR captures speech at telephone bandwidth by design. The MP3 preserves everything the original holds; nothing more was ever recorded.
Why does the first conversion take a moment to start?
Browsers cannot read AMR natively, so the site loads its own decoding engine on first use — a one-time download of a few seconds, cached afterward. Later conversions start immediately.
My call recordings are sensitive — are they uploaded?
No. The conversion runs entirely in your browser on your own device — no upload, no server, no copies. Sensitive recordings are exactly why this site works the way it does.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.