WMA to MP3 Converter
WMA is Microsoft's audio format. Used widely for ripped CDs in Windows Media Player and on older Windows phones. Browsers don't decode WMA natively because Microsoft never licensed playback to them, but ffmpeg's WMA decoder works fine and runs locally here.
How it works
Drop the WMA
Standard WMA files from Windows Media Player rips, MSN Music downloads, or older Windows phones.
Up to 200 MB
Pick a bitrate
Most WMA files were encoded at 128-192 kbps. Re-encoding to 192 or 256 kbps MP3 keeps everything audible. Going to 320 kbps doesn't add quality but doesn't hurt either.
Encoder: libmp3lame · CBR
Download
Standard MP3 that plays anywhere. Tags transfer where ffmpeg can map them.
Standard MP3 with ID3v2
Nothing gets uploaded
Your old music library stays private
Most WMA-to-MP3 sites make you upload every file to their server and hope they delete it afterward. This runs entirely in your browser, the conversion happens on your own machine, so a whole ripped-CD collection converts without a single file leaving your computer. No account, no upload bar, no privacy policy to squint at.
Plays everywhere
From a format Windows owns to one everything reads
WMA made sense when Windows Media Player was on every PC, but modern phones, most car stereos, and nearly every music app won't touch it. MP3 is the format that just works, plug it into anything made in the last twenty years and it plays. Converting your old rips is how you actually get to listen to them again.
Honest heads-up
DRM-locked files can't be converted, by anyone
If a WMA came from an old subscription store and carries Windows Media DRM, no converter can open it without the licence key, and any site claiming it can is wasting your time. Files you ripped yourself or downloaded DRM-free convert cleanly. If one errors out with a 'protected stream' message, that's the DRM, not the tool.
Frequently asked questions
Why don't browsers play WMA directly?
WMA is a Microsoft proprietary codec. The major browser vendors (Google, Mozilla, Apple) never licensed it for playback. So if you double-click a .wma file in a web app, it won't play. Decoding has to happen via a separate codec. Ffmpeg includes one and it runs in WebAssembly here.
What about DRM-protected WMA files?
Old WMA files protected by Windows Media DRM (.wma with rights restrictions) can't be decoded by ffmpeg or any tool that doesn't have the DRM key. If conversion errors out with something like 'protected stream', that's why. Only DRM-free WMA files convert successfully.
Why convert WMA to MP3 these days?
Mostly migration. People with old Windows libraries or burned WMA CDs need to consolidate to MP3 because Windows Media Player isn't on every device anymore, and most phones, modern car stereos, and music apps don't play WMA.
Goes well with this tool
AAC to MP3
Raw AAC files.
M4A to MP3
iTunes-style M4A files.
MP3 to WAV
Move MP3 audio into uncompressed WAV.
AI Mastering
Master a converted file for streaming.
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Supports WAV · FLAC · MP3 · M4A · AIFF