How do I convert MKV to MP4 online for free?

Video Conversion

Convert MKV to MP4 Online

Free online Matroska Video to MP4 Video converter. Files are processed locally in your browser — no uploads, 100% private.

.MKV

.MP4

Drop your .MKV file here

or click to browse from your device

Accepts .MKV files

100% Private

Files never leave your device

Instant

In-browser processing

No Account

No sign-up required

How to Convert MKV to MP4 Online

1Upload your .MKV file using the drop zone above or click to browse
2Your file converts automatically to .MP4 format entirely within your browser
3Download your converted file — no account or email needed

Frequently Asked Questions

Upload your Matroska Video file using the drop zone above. Your file is instantly converted to MP4 Video format right inside your browser using client-side processing — no account, no software, and no cost. When conversion is complete, click Download to save your MP4 file.

Completely. Our converter runs 100% in your browser using local processing, so your MKV file never leaves your device or touches any external server. We do not store, access, or transmit your files at any point.

Desktop: up to 500 MB. Mobile: up to 200 MB. All processing happens locally in your browser — your files are never uploaded to any server.