Convert WMA to MP3
Rescue a Windows Media era library. Drop in your .wma files and get MP3s that play on any phone, car stereo, or app, converted right on your device.
Why convert WMA to MP3?
Most WMA files date to the Windows XP years, when Windows Media Player ripped CDs to WMA by default. Two decades later those rips are stranded: iPhones will not play them, most Android phones and car stereos ignore them, and apps like GarageBand and the Mac Music app refuse to import them. Old handheld voice recorders from Olympus, Sony, and Philips also saved dictation as WMA. Converting to MP3 puts all of it back in circulation on any device you own today. It is less a format upgrade than a rescue operation for a library you already spent hours building.
Quality and file size
WMA and MP3 are both lossy, so this is a transcode, not a copy. Re-encoding adds a small generation loss on top of whatever the original rip discarded, and no setting can bring that data back. To keep the loss effectively inaudible, choose 320 kbps, or 256 if you want smaller files; for spoken word recordings even 128 sounds fine. Expect the MP3s to come out larger than the WMA originals, since most Windows era rips used modest bitrates: the extra size buys compatibility, not restored detail. Convert once, keep the MP3s as your new masters, and avoid running files through repeated round trips between lossy formats.
WMA to MP3: common questions
Will converting WMA to MP3 lose quality?
A little. Both formats are lossy, so re-encoding with libmp3lame adds a small generation loss. At 320 or 256 kbps the difference is very hard to hear; just do not convert the same file back and forth repeatedly.
Are my WMA files uploaded to a server?
No. The converter runs FFmpeg in WebAssembly inside your browser tab, so your file never leaves your device. We never see it, store it, or train on it.
Can I convert MP3 back to WMA here?
No. This tool decodes WMA as an input only and does not create WMA files. Almost nothing modern prefers WMA, so MP3 is the safer place for your library to live going forward.
Will this work on files from an old voice recorder?
Usually, yes. Old dictation recorders saved everything as WMA, and those files decode the same way ripped music does. Once converted, the recordings will play on any phone and feed cleanly into a transcription tool.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.