MP3 to WMA converter
Convert MP3 to WMA in seconds, free and unlimited. No upload, no sign-up, no watermark: your audio never leaves your device. Re-encodes the audio into WMA.
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Quick answer: To convert MP3 to WMA, add the MP3 file to the iHateFiles MP3 to WMA converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. Re-encodes the audio into WMA.
Should you convert MP3 to WMA?
Do this when WMA plays somewhere MP3 does not. It is a second round of lossy compression, so set the bitrate at or above the original.
Both MP3 and WMA are lossy
MP3 (MPEG-1 Layer III) has already discarded some of the sound, and WMA (Windows Media Audio) will discard a little more. The WMA encoder works from the MP3, not the original recording, so pick a bitrate at or above the source. A lower one saves space and costs quality you cannot get back.
Where the WMA will play
WMA plays on Windows, and very little on phones or Macs.
MP3 and WMA side by side
| MP3 | WMA | |
|---|---|---|
| Inside the file | MPEG-1 Layer III | Windows Media Audio |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| One minute of stereo | 1 to 2.4 MB | 1 MB or so |
| Plays on | everything, including car stereos and hardware twenty years old | Windows, and very little on phones or Macs |
| Here | Read and write | Read and write |
What usually goes wrong
About the MP3. Converting an MP3 to another lossy format compounds the damage, because the second encoder is guessing at audio the first one already threw away.
About the WMA. A WMA bought from an early music store may be DRM-locked, and no conversion can lawfully unlock it. A WMA you ripped yourself converts without any trouble.
How to convert MP3 to WMA
- Add your MP3 file. It is read from your disk and stays there.
- Check the settings. The output format is already set to WMA.
- Press convert and the WMA file is saved back to your device.
Questions
How do I convert MP3 to WMA?
Open this page, add your MP3 file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this MP3 to WMA converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to WMA lose quality?
WMA is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several MP3 files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.