Convert MP4 to MKV
Convert MP4 videos to MKV container format. Free browser-based tool ideal for preserving multiple audio tracks and subtitles.
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All files are converted in the browser and do not leave your device. Use the app for offline conversions.
Supported Conversions
3,742 total conversions across all formats
Direct conversions transform files in one step.
Multi-stage conversions use intermediate formats for complex transformations.
Same format conversions allow you to alter compression, quality, or other settings.
Audio Formats
435 conversions available
Video Formats
914 conversions available
Image Formats
892 conversions available
Document Formats
1501 conversions available
Why Convert MP4 to MKV?
About MP4 Format
MP4 is a widely compatible video format but has limitations in supporting multiple audio tracks, subtitles, and certain advanced features that power users may need.
Benefits of MKV Format
MKV is a flexible container format that can hold unlimited audio, video, picture, and subtitle tracks in a single file. It's perfect for organizing complex video content with multiple language tracks and subtitle options.
When you normally Google "mp4 to mkv" ↓
Lost privacy with tools that send your files to unknown servers
Frustration when a file format isn't supported
Confusion dealing with complicated command-line tools
Risk of exposing sensitive files during conversions
Overwhelm from managing multiple tools for different file types
= Too many headaches with traditional file converters
🤕
There's an easier way
Great app! Finally something local to convert from anything into anything else, instead of every time going to google "convert x into y online".
Sergiy Horef (Mizyigres)
Convert Files Locally on Your Computer
Tired of uploading files to sketchy online converters? Fed up with command line tools?
- ✓3,093+ conversions for video, audio, image & documents
- ✓100% private - files never leave your computer
- ✓1,077+ users converting files offline
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