Free Online mkv to mp4 ConverterFree, Secure, and Fast
Convert videos in your browser while preserving quality, audio, and subtitles—no server uploads required. Perfect for playing mkv files on mobile devices, Smart TVs, sharing on social media, or easily distributing videos to others.
Recommended: Each file should be under 1.5GB. Maximum 10 files at a time.
How to Convert mkv to mp4 Online
Select Your mkv File
Click "Select File" or drag the mkv video you want to convert to mp4. You can add multiple files at once.
Click "Convert" and Wait a Few Seconds
The tool processes each video in your browser, and thanks to sequential processing, a 500MB file converts in just seconds.
Download Your mp4 Instantly
When everything's done, download each video separately or use "Download All." The mp4 retains the original audio and subtitles.
mkv to mp4 Converter Features
Completely Free
Convert mkv to mp4 without paying a dime or dealing with hidden subscriptions.
Always Available Online
Our online mkv to mp4 converter works from any browser—no software installation needed.
User-Friendly Interface
Just three clicks to convert mkv to mp4—no technical expertise required.
Fast Conversion
Even a 500MB file converts in seconds thanks to local processing power.
Batch Conversion
Add multiple mkv files and the system converts them one after another automatically.
Private and Secure
Conversion happens 100% in your browser—your videos never leave your device.
Responsive on All Devices
The interface adapts to mobile phones, tablets, and computers for a comfortable experience on any screen.
No Usage Limits
Ideal for unlimited mkv to mp4 conversion—we don't impose daily quotas or frequency restrictions.
No Registration Required
Start converting immediately—no email or account creation needed.
How to Get the Best Experience Converting mkv to mp4 Online
- 1
Keep Files Under 1.5GB
The converter is most stable with medium-sized files. If your mkv is very large, compress or trim it beforehand using FFmpeg on your computer.
- 2
Avoid Canceling Mid-Process
Each video converts in turn. If you stop a job in progress, refresh the page before starting another to free up browser memory.
- 3
Download When Done and Refresh the Tab
After conversion completes, download the mp4 and reload the site to ensure browser resources are properly recycled.
- 4
Keep the Tab Active
Use Chrome or Edge on desktop, prevent your computer from sleeping, and don't close the tab until you see the "Download" button.
- 5
Use FFmpeg for More Control
When you need to adjust bitrate, resolution, or advanced subtitle settings, process the video with FFmpeg locally, then verify the result with the online converter.
Other Ways to Convert mkv to mp4
FFmpeg on Desktop
Use basic FFmpeg commands (Windows/macOS/Linux) to convert mkv to mp4 without quality loss and with full parameter control.
VLC Media Player
VLC includes a "Convert/Save" option that lets you convert mkv to mp4 from a graphical interface—ideal if you already have it installed.
Mobile Apps
Android and iOS offer apps that convert mkv videos to mp4 directly on your phone—useful when you need to share a quick clip.
Cloud Services
Online platforms upload your video to a server and return the converted mp4—useful for heavy conversions if you have a stable connection.