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AMR to WMA Converter

Convert AMR files to WMA format online for free. No installation or registration required.

Quick Answer: How to Convert AMR to WMA

AMR is the Adaptive Multi-Rate codec built for mobile phone voice recording. WMA is Microsoft's Windows Media Audio family of codecs. Converting between them re-encodes the media with WMA's compression model, so output quality depends on the settings you pick in the converter. Run it free at practicalwebtools.com/convert/audio/amr-to-wma: drop in your AMR, adjust settings if you like, and download the WMA — no signup, no upload, everything stays on your device.

AMR vs WMA: Which One and Why

AMR is the Adaptive Multi-Rate codec built for mobile phone voice recording, standardized by 3GPP in 1999 for GSM and 3G voice calls. WMA is Microsoft's Windows Media Audio family of codecs, launched by Microsoft in 1999 to compete with MP3 and later AAC. People reach for AMR mainly for phone voice memos, call recordings, answering machines, while WMA is the usual choice for legacy Windows media libraries, some voice recorders. AMR's headline strength: tiny files — a minute of voice is under 1 MB. WMA's: good quality at low bitrates (64–128 kbps). On the other side of the ledger, AMR limitation: unusable for music — the codec discards everything above ~3.4 kHz (phone-line bandwidth) — and WMA limitation: near-zero support on Apple devices.

How to Convert AMR to WMA Online

  1. 1

    Add your AMR file: Drag and drop it into the converter, or click to browse. AMR files up to the size limit are accepted, and nothing is uploaded — processing runs locally in your browser.

  2. 2

    Set WMA options: Pick your quality: the converter exposes the settings that matter for WMA. Higher bitrates preserve more of the AMR's detail at larger file sizes.

  3. 3

    Download the WMA: Conversion runs on your device. When it completes, download the WMA file — repeat for as many files as you need, free and unlimited.

Key Facts

  • AMR: standardized by 3GPP in 1999 for GSM and 3G voice calls, lossy, speech-only — from 4.75 to 12.2 kbps.
  • WMA: launched by Microsoft in 1999 to compete with MP3 and later AAC, lossy (Standard and Pro variants); WMA Lossless also exists.
  • AMR strength: tiny files — a minute of voice is under 1 MB.
  • WMA strength: good quality at low bitrates (64–128 kbps).
  • AMR limitation to know: unusable for music — the codec discards everything above ~3.4 kHz (phone-line bandwidth).
  • WMA limitation to know: near-zero support on Apple devices.
  • Under the hood: WMA Pro supports high-resolution multichannel audio, but most hardware labeled "WMA" decodes only the original 1999 codec

Format Background

AMR

AMR — standardized by 3GPP in 1999 for GSM and 3G voice calls. AMR locks to one of 8 bitrates and can switch mid-file — old phones used this to maintain calls as signal degraded

WMA

WMA — launched by Microsoft in 1999 to compete with MP3 and later AAC. WMA Pro supports high-resolution multichannel audio, but most hardware labeled "WMA" decodes only the original 1999 codec

Frequently Asked Questions

Will converting AMR to WMA lose quality?

It depends on the formats: AMR is lossy, speech-only — from 4.75 to 12.2 kbps and WMA is lossy (Standard and Pro variants); WMA Lossless also exists. Any step from a lossless source into WMA keeps everything; any lossy step re-encodes and discards some data.

Are my files uploaded anywhere during AMR → WMA conversion?

No. This converter runs on WebAssembly inside your browser — your AMR file is read from disk, processed by your device's CPU, and the WMA is written back locally. There is no server upload at any point, which also means no size-based throttling or waiting in queue.

Is WMA still a current format in 2026?

Windows Media Player, some older car and Hi-Fi hardware; effectively legacy. WMA Pro supports high-resolution multichannel audio, but most hardware labeled "WMA" decodes only the original 1999 codec

Do I need to install anything to convert AMR to WMA?

No installation. The converter is a web page — open it in any modern browser on Windows, macOS, Linux, iOS, or Android. AMR decoding and WMA encoding both run via WebAssembly at native-adjacent speed.

Related Converters

AMR to MP3AMR to WAVAMR to OGGAMR to AACMP3 to WMAWAV to WMAOGG to WMAAAC to WMA

Further reading

Guides and explainers on the Practical Web Tools blog cover audio and video formats in depth — or browse every audio converters pair from the hub.