Convert WMA to MP3
To convert WMA to MP3, drop the .wma file onto the converter on this page and click to encode an MP3 locally. The whole job runs through ffmpeg WebAssembly in your browser, so a track from an old Windows library is converted on your own device and never reaches a server.
Runs in your browser. Your file never leaves your device.Drop your WMA hereChoose a WMA to convert
It becomes a MP3 right in your browser, up to 200 MB
Your file never leaves your device
Works in airplane mode. See the proof
Limits, published exactly
| Where it runs | In your browser. The file never leaves your device. |
|---|---|
| Free conversions | Unlimited. No account, no ads, no queue, no watermark. |
| Max file size, free | 200 MB |
Why convert WMA to MP3?
WMA is Microsoft's old lossy format from the Windows Media Player and early-2000s ripping era, so the files usually surface from a dusty music library that got copied forward across PC after PC. The trouble is that almost nothing outside the Windows world wants to touch a .wma: phones, browsers, car stereos, Macs and most modern apps either refuse it or handle it grudgingly. Converting to MP3 lifts that music off a stranded legacy format and onto the one container that genuinely plays everywhere, which is usually the whole reason anyone digs these files out in the first place.
What is WMA?
WMA is Microsoft's audio format from the Windows Media era, still found in old ripped libraries and downloads. Outside Windows it is poorly supported, and even there the ecosystem has moved on. Converting to MP3 makes those files playable on phones, browsers, and everything else.
What is MP3?
MP3 is the audio format that ate the world in the late 1990s, and it remains the most universally supported way to store sound: lossy compression at roughly a tenth of CD size, playable on literally anything with a speaker. Newer codecs like AAC and Opus beat it on quality per kilobyte, but no format comes close to its compatibility across car stereos, ancient MP3 players, browsers, editing software and upload forms.
Quality and what to expect
WMA and MP3 are both lossy, so this is a lossy-to-lossy transcode that adds a second generation of loss to whatever the original WMA already threw away. The MP3 is encoded by LAME at a high variable bitrate (around 190 kbps), which is comfortably above the modest bitrates most old WMA rips used, so the encode itself adds little audible degradation on top of an already-imperfect source. Do not expect MP3 to repair anything the WMA lost; it preserves the existing quality and existing artifacts faithfully. Length, sample rate and channels are kept, and the old library tags are not carried into the new file.
WMA to MP3 FAQ
Why will not my .wma files play on my phone or Mac?
Because WMA is a Microsoft format from the Windows Media era, and support for it never really left Windows. Phones, Macs, browsers and most car stereos either ignore it or play it badly, which is exactly why people convert it.
Will the MP3 sound better than the WMA?
No, and no converter can make that promise. WMA is lossy, so the MP3 preserves the quality already there rather than improving it; the win is compatibility, not fidelity. The high encode bitrate keeps added loss minimal.
Can I trust an old private library to this converter?
Yes, because nothing about it is sent anywhere. The WMA is decoded and the MP3 written entirely by WebAssembly in your browser; there is no server in the loop to receive, store or expose your music.
Do I get my track names and artist tags back?
Not automatically. The MP3 starts with a clean tag slate rather than copying the old WMA metadata, so you may need to re-tag in your music app if the names matter to you.