WMA to MP3 Converter — Convert Windows Audio Online
Convert WMA audio files to universally compatible MP3 format with selectable bitrate. Browser-based converter using FFmpeg WebAssembly — fast and private.
Drop your .wma file here
Higher bitrate offers better audio quality but results in a larger file size. 192 kbps is a good balance.
Your converted MP3 audio will play here.
Universal Audio Compatibility
WMA files are often locked into the Windows ecosystem. Our converter brings your entire music library into the universal MP3 format, ensuring every track plays on phones, car stereos, smart speakers, and any media player — without Microsoft software.
Why Use This Converter?
Bitrate Control
Choose from 128 to 320 kbps. Lower for voice memos, higher for music — you're always in control of the quality-size tradeoff.
Fully Private
Your audio never leaves your computer. FFmpeg WebAssembly processes everything locally in the browser.
How this WMA to MP3 Converter works
This audio converter transforms WMA (Windows Media Audio) files into the universally compatible MP3 format using FFmpeg WebAssembly running entirely within the browser. WMA is a proprietary audio codec developed by Microsoft, commonly found on older Windows devices and music libraries. While WMA offers decent compression, its limited cross-platform support makes MP3 conversion essential for playback on non-Windows devices, car stereos, and most streaming platforms.
The tool loads the FFmpeg engine from a CDN as a WebAssembly module, writes the uploaded WMA file to FFmpeg's virtual filesystem, then executes the transcoding command using the LAME MP3 encoder at the user-selected bitrate (128, 192, 256, or 320 kbps). The -ar 44100 flag ensures standard CD-quality sample rate output, while -ac 2 maintains stereo channel configuration when present in the source.
FFmpeg's progress callback events drive a real-time progress bar during encoding, providing visual feedback for larger files. The -map_metadata 0 flag attempts to preserve any ID3 tags (artist, album, title) embedded in the WMA file's ASF container. Privacy is guaranteed by the browser-local processing model — WMA files are never transmitted to any external server. The built-in HTML5 audio player enables instant preview of the converted MP3 before downloading.
How to Use
Upload WMA
Select or drag your .wma audio file into our converter.
Choose Quality
Select your preferred MP3 bitrate (128–320 kbps).
Convert & Save
Hit convert and download the MP3 copy instantly.
Example Usage
Convert a WMA file from an old Windows Media Player library into a universal MP3 for modern devices.
Frequently Asked Questions
What is a WMA file?
Why convert WMA to MP3?
Is there any quality loss?
How long does it take?
Is my audio secure?
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The WMA to MP3 Converter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
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