Convert MKV to MP4 Online

About This Conversion

MKV is great for storing high‑quality video with multiple audio/subtitle tracks, but not all players support it. Convert MKV to MP4 for universal playback on phones, tablets, and TVs.

Why Convert MKV to MP4?

Compatibility: MP4 works on more devices and platforms.

File Size: Often results in smaller files without noticeable quality loss.

Editing: MP4 is easier to edit with most video software.

Sharing: Upload to social media, email, or cloud storage with fewer issues.

🔒 Privacy First

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

How to Convert MKV to MP4

Drag & drop your MKV file into the area above.
Verify that the target format is set to MP4 (it should be pre‑selected).
Click “Convert Video” and wait a few seconds while FFmpeg processes the file.
Download your converted MP4 file—ready to use.

Frequently Asked Questions

Is this conversion free?

Yes, 100% free. No hidden fees, no trial limits.

Are my files uploaded to a server?

No. The entire conversion runs inside your browser using WebAssembly. Your data stays on your machine.

What are the supported file sizes?

You can convert files up to several gigabytes, as long as your browser has enough memory. For best performance, we recommend files under 1 GB.

Can I convert multiple files at once?

Currently, the tool processes one file at a time. You can queue files by converting them sequentially.