Convert MKV to MP4

Convert MKV files into MP4 for players and devices that don't support the MKV container.

No login requiredFiles stay private

Drop files here, or click to browse

MP4, WebM, MOV, AVI, MKV, Video no file size limit

Browse files

Your files never leave your device. All processing happens locally in your browser.

MP4 tips

🎬

MKV is a flexible container but many TVs, phones, and editors don't support it. MP4 plays almost everywhere.

📤

Most social platforms and upload forms accept MP4 but not MKV — convert before uploading.

⚡

Large MKV files take time to re-encode in the browser. The converter is best on desktop for big files.

🔒

No upload means no file-size cap and full privacy for your library.

Choose File

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Process

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Download

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Completely free — no hidden costs, ever

✓No account, email, or login required

✓Files never leave your device

✓No file size limits whatsoever

✓No watermarks on any output

Convert WebM to MP4

Turn a WebM video into MP4 so it plays on iPhones,

Convert MOV to MP4

Convert iPhone/QuickTime MOV recordings into unive

Convert MP4 to WebM

Convert MP4 to WebM for smaller, web-native video

Convert Video for Editing

Convert clips into a format your editing software