WMA Won't Open? Convert to MKA Instantly
Fast, instant WMA to MKA conversion. No signup required. Just drop your .wma file and get .mka in seconds.
Batch Settings
WMA形式の音声ファイルを、より汎用性の高いMKA形式へ変換したいとお考えでしょうか。アニメのサウンドトラックやビジネスでの音声メモ、あるいは大切な朗読音源など、様々なシチュエーションでWMAが使われることは少なくありません。しかし、再生環境の制約や編集の困難さに直面することも。MKAは、複数の音声トラックや字幕を格納できる柔軟なコンテナ形式であり、特に動画コンテンツの多言語対応や、高音質なオーディオブックの管理においてその真価を発揮します。この変換を通じて、お手持ちの音源をより多くのデバイスで、そしてより自由に活用できるよう、お手伝いさせていただきます。
- アニメの多言語音声トラック
- ビジネス会議の議事録共有
- 伝統芸能のアーカイブ化
MKAは、特に字幕や複数の音声言語を扱うアニメコンテンツにおいて、製作者側と視聴者側の双方に利便性を提供します。フォントの埋め込みも可能で、縦書き表示など日本独自の表現にも対応しやすい点が評価されています。
About WMA to MKA Conversion
Dealing with a WMA file that won't open on your device? You're not alone — WMA compatibility issues are one of the most common reasons people search for a file converter. WMA (Windows Media Audio) is Microsoft's audio codec — less common today but still found in legacy collections.
The fix is simple: convert your WMA to MKA. MKA is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting WMA to MKA maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your WMA file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a MKA file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert WMA to MKA
- 1
Add your WMA file
Drag and drop your .wma file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MKA output
Select .mka as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The audio engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .mka file. For batch jobs, download all at once as a zip.
What Happens When You Convert WMA to MKA
Your WMA file is decoded and re-encoded as MKA.
Your WMA file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in MKA format
The converted file is ready for download
Format Comparison
WMA
.wma file
| Extension | .wma |
| MIME Type | audio/x-ms-wma |
| Category | Audio |
MKA
.mka file
| Extension | .mka |
| MIME Type | audio/x-matroska |
| Category | Audio |
Should You Convert WMA to MKA?
When to Convert
- ✓When you need a MKA file
Frequently Asked Questions
Why won't my WMA file open?
WMA files may not open if your device lacks the right codec or application. Converting to MKA — a more widely supported format — usually resolves this. MKA is a widely used file format.
Is it safe to convert WMA to MKA online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting WMA to MKA?
Converting WMA to MKA maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my WMA file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert WMA to MKA on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.