WMV to MKV converter
Convert WMV files to MKV with encrypted uploads and automatic deletion. Open container supporting virtually any codec combination.
Drop a WMV file, or click to browse
Converts to MKV · runs live, right now
How it works
Drop your file
Drag a WMV file in, or click to browse. No account needed to try it.
We convert it
Encrypted upload, converted to MKV in our ffmpeg pipeline.
Download the result
Grab your MKV file immediately, or find it later in your dashboard.
Why convert WMV to MKV?
Both WMV and MKV use lossy compression, so the conversion mainly changes compatibility, not quality. The main reason to convert WMV to MKV is compatibility: MKV plays back smoothly in browsers and on mobile without a codec pack, while WMV doesn't always. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, MKV is usually the safer target.
Format comparison
| WMV | MKV | |
|---|---|---|
| Extension | .wmv | .mkv |
| MIME type | video/x-ms-wmv | video/x-matroska |
| Compression | lossy compression | lossy compression |
| Category | video | video |
Your file, handled carefully
Uploads are encrypted in transit and at rest, processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting WMV to MKV free?
Yes — the first 50 conversions every month are free on any plan, including WMV to MKV.
Will I lose quality converting WMV to MKV?
MKV is open container supporting virtually any codec combination. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
No, not by default. You choose a retention window at upload — immediate, 1 hour, 24 hours or 7 days — and the file is permanently deleted after that.
What is WMV?
Windows Media video format.
Will my converted file have a watermark?
On the Free plan, MKV output includes a small "Converted with Convyx" mark. Pro ($9/mo) removes it, along with the 25 MB file size cap.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click, and nothing is charged against your quota for a failed job.