WMA to MP3 Converter
Inspect your WMA file metadata in the browser and generate the perfect FFmpeg command to convert it to MP3 at your chosen bitrate — no upload required.
Inspect WMA Metadata
Drop a WMA (or any audio) file to read its properties. Nothing is uploaded.
FFmpeg Command Generator
ffmpeg -i input.wma -c:a libmp3lame -b:a 192k -map_metadata 0 output.mp3
Install FFmpeg free at ffmpeg.org.
Replace input.wma with your actual filename.
Batch convert (Linux / macOS)
for f in *.wma; do ffmpeg -i "$f" -c:a libmp3lame -b:a 192k -map_metadata 0 "${f%.wma}.mp3"; done
Batch convert (Windows PowerShell)
Get-ChildItem *.wma | ForEach-Object { ffmpeg -i $_.FullName -c:a libmp3lame -b:a 192k -map_metadata 0 ($_.BaseName + ".mp3") }
GUI alternatives
- VLC Media Player — free, cross-platform; use Media > Convert/Save to output MP3
- fre:ac — free, open-source, Windows / macOS / Linux, supports WMA input and MP3 output
- Audacity — free, open-source; import WMA (requires FFmpeg library), export as MP3
- dBpoweramp — paid, Windows / macOS, batch WMA-to-MP3 with DSP processing
Drop a WMA file on the left to inspect its metadata
No file is uploaded — everything runs in your browser
Decoding audio metadata...
Duration
—
Sample Rate
—
Channels
—
Source File Size
—
Estimated MP3 Output Size
128 kbps
—
192 kbps
—
320 kbps
—
Formula: bitrate (kbps) x duration (s) / 8000. Actual size may vary slightly.
MP3 Bitrate Reference
| Bitrate | Quality | Size / min | Best For |
|---|---|---|---|
| 128 kbps | Good | ~0.9 MB | Earbuds, laptop speakers |
| 160 kbps | Very Good | ~1.2 MB | Casual music listening |
| 192 kbps | High | ~1.4 MB | General music, streaming prep |
| 320 kbps | Maximum | ~2.4 MB | Audiophile, archival MP3 |
Note: WMA at 128 kbps is generally slightly more efficient than MP3 at the same bitrate. Choose 192 kbps or higher to match or exceed WMA source quality.
WMA vs. MP3 — At a Glance
WMA (Windows Media Audio)
- Slightly better compression than MP3 at same bitrate
- Native support on Windows, Xbox, and older portable players
- WMA Lossless variant available for archival quality
- Proprietary Microsoft format with limited cross-platform support
- Not supported natively on iOS, Android, or most streaming platforms
MP3 (MPEG Audio Layer III)
- Universally supported on every device, player, and platform
- Royalty-free; patents expired in 2017
- Accepted by all major streaming services and social platforms
- Slightly larger files than WMA at equivalent perceptual quality
- Lossy only — no lossless MP3 variant exists
Summary
Inspect your WMA file metadata in the browser and generate the perfect FFmpeg command to convert it to MP3 at your chosen bitrate — no upload required.
How it works
- Drop a WMA file onto the inspector panel (or click to browse).
- The Web Audio API reads the file's sample rate, duration, and channel count locally.
- Choose an MP3 bitrate — 128 kbps for casual listening, 192 kbps for good quality, 320 kbps for maximum fidelity.
- Copy the generated FFmpeg command and run it in your terminal.
- Verify the output MP3 in a player before deleting your original WMA.
Use cases
- Convert a WMA music library to MP3 for universal playback on any device or app.
- Prepare WMA recordings for sharing on streaming platforms that do not accept WMA.
- Transfer WMA files from Windows Media Player to iPhone, Android, or a car stereo.
- Batch-convert an entire WMA album by adapting the single-file command into a shell loop.
- Check a WMA file's sample rate and duration before encoding.
- Estimate the output MP3 file size before committing to a bitrate.
- Generate a ready-to-paste FFmpeg command without memorizing its flags.
- Compare WMA and MP3 characteristics side-by-side before deciding on a format.