Start here
Convert your WMA to MP3
The file stays in this browser.
- Choose your WMA file
- Pick the MP3 quality
- Download your MP3
Audio conversion uses FFmpeg through the single-threaded @ffmpeg/core 0.12.10 build, licensed under GPL-2.0-or-later. FFmpeg. ffmpeg.wasm.
How it works
How to convert WMA to MP3
Choose your WMA file. Drop it on the box or click Choose a file. Only one file at a time, up to 150 MB.
Pick the audio quality. Choose 128, 192, 256 or 320 kbps. For music ripped from CDs, 192 kbps is a sensible start.
Convert. Click Convert to MP3. Your browser does the work, so the file never leaves your device.
Download. Change the Download name if you like, then click Download MP3.
Basics
What is a WMA file?
WMA stands for Windows Media Audio. It was the default format when you ripped a CD with Windows Media Player for many years, so a lot of older music libraries are full of it. WMA files play well on Windows, but many phones, car stereos and music apps outside Windows skip them or show an error.
MP3 fixes that. It's the most widely supported audio format, so once your WMA tracks are MP3s, they play almost everywhere.
Formats
Which bitrate should I choose for WMA?
Converting from WMA to MP3 means decoding one lossy format and encoding another. A higher MP3 bitrate can't bring back detail the WMA file never had, but a very low one can add new artifacts. A good rule: match or slightly exceed the original bitrate. Many CD rips from Windows Media Player were made at 128 or 192 kbps, so 192 kbps is usually plenty.
| Quality | Size per minute | Good for |
|---|---|---|
| 128 kbps | about 0.96 MB | Speech, voice memos, podcasts |
| 192 kbps | about 1.44 MB | Everyday music listening |
| 256 kbps | about 1.92 MB | Music on good headphones |
| 320 kbps | about 2.4 MB | The highest MP3 setting |
Good to know
Protected WMA files
Some WMA files bought from older online music stores were locked with DRM. Those files are encrypted, and this tool can't decode them. If a file fails right away, check whether it came from a store or subscription service. Tracks you ripped yourself from a CD are not protected and convert normally.
Good to know
Lossless and voice WMA
WMA also came in variants, including WMA Pro, WMA Lossless and WMA Voice. The converter reads the audio inside the file and writes a normal MP3, so you don't have to know which variant you have. If a lossless WMA is your only copy of an album, consider keeping the original and adding the MP3 as a second copy.
Limits
What this converter does and doesn't do
- It converts one file at a time, up to 150 MB.
- It keeps the first audio track only. If a file has several tracks, the others are skipped.
- It runs in your browser with ffmpeg.wasm. Nothing is uploaded to a server, and there's no account to create.
- It can't open copy-protected (DRM) files.
- The output is a single MP3 at the bitrate you choose.
More detail in our guides: Convert to MP3 on Windows 10 and 11: Free Options Compared and Screen Recording to MP3: Get the Audio From Any Screen Capture.
FAQ
Frequently asked questions
Is it free to convert WMA to MP3?
Yes. There's no fee, no account and no watermark on the audio.
Are my WMA files uploaded anywhere?
No. The file is read and converted by your browser. It never goes to our servers.
Can I convert a whole WMA music folder at once?
Not at the moment. The converter takes one file at a time. For an album, convert each track in turn; the settings you pick stay the same between files.
Why won't my WMA file convert?
The most common reason is DRM copy protection from an old music store. A damaged file or one larger than 150 MB will also fail.
Will converting WMA to MP3 lose quality?
A little, since both formats are lossy. At 192 kbps or higher, most people can't hear a difference from the WMA original.
Does it keep the song title and artist?
The MP3 is named after your file, and you can change the name before downloading. Tags stored inside the WMA, such as album and artist, aren't guaranteed to carry over.
Get started
Convert your WMA file to MP3
Pick the file, choose a quality and download an MP3 that plays anywhere. Nothing is uploaded.
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