MKV to MP4 Converter
Convert MKV (Matroska) videos to widely compatible MP4 in your browser.
MKV (Matroska) is a flexible container popular for high-quality video, but many phones, smart TVs, and editing apps won't play it. Converting to MP4 makes your video work on almost any device.
Processing happens locally in your browser, using hardware acceleration when your device supports it — no upload, no waiting in a queue.
How to convert MKV to MP4
- 1Drop your MKV file into the area above — or click to browse.
- 2The output format is already set to MP4. Adjust the quality settings if the format supports them.
- 3Click convert, then download your MP4 file. Everything runs locally — nothing is uploaded.
Frequently asked questions
Many consumer devices only support MP4 out of the box. MKV is common for downloads but isn't universally playable, so converting to MP4 resolves most playback issues.
If the existing video codec is compatible, quality is preserved closely. When re-encoding is required, default settings are chosen to keep the result visually faithful.
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is uploaded to any server.
Yes. Once the page has loaded, the tool works completely offline. For the best experience, install PrivaDeck as a PWA from your browser.
Other conversions
Need a different format?
Open the full video converter to switch between MP4, MKV and AVI, choose H.264 or H.265, and convert with hardware acceleration where available.
Open the full Video Converter