Convert MP3 to WMA offline

Convert local MP3 files to WMA files offline by JavaScript in your web browser without any software downloads or file uploads!

# File Name File Size Actions
How to convert MP3 to WMA offline

Choose local MP3 files, choose "WMA" as target audio format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. Each file can be up to 2GB. Please note this offline audio converter only works in web browsers that support new technologies such as WebAssembly, Shared Array Buffer and Site Isolation. Use online converter instead if this offline converter doesn't work in your web browser.


Name MP3 WMA
Full name MPEG-1 or MPEG-2 Audio Layer III Windows Media Audio
File extension .mp3 .wma
MIME audio/mpeg, audio/MPA, audio/mpa-robust audio/x-ms-wma
Developed by Fraunhofer Institute Microsoft
Type of format Digital audio Audio file format
Introduction MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. Windows Media Audio (WMA) is an audio data compression technology developed by Microsoft. The name can be used to refer to its audio file format or its audio codecs. It is a proprietary technology that forms part of the Windows Media framework. Each WMA file features a single audio track in one of the four sub-formats: WMA, WMA Pro, WMA Lossless, or WMA Voice.
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