Convert MKV videos to MP4 format for better device compatibility.
Convert MP4 to MKV
Convert MP4 videos to MKV format for multiple audio tracks and subtitles.
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* Files deleted after 24 hoursConvert files up to 100 MB for free
How to convert MP4 to MKV online
1
Drag and drop your MP4 file, or click to select a file. Works with MP4 videos from various sources.
2
The tool converts your MP4 to MKV. It preserves video and audio quality while changing the container format.
3
Wait for the conversion to finish. Most MP4 files take 10-30 seconds. A progress bar shows the status.
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When conversion finishes, you can preview the MKV file. Check the video quality and file size before downloading.
5
Click Download to save the MKV file to your device. Files are deleted after 24 hours.
About MKV Format
MKV (Matroska) is an open-source container format for video, audio, and subtitles. It was developed as an alternative to proprietary formats like MP4, offering more flexibility and features. MKV supports multiple audio tracks, subtitles, chapters, and various codecs.
History and Development
MKV was developed by the Matroska project starting in 2002. It was designed as an open-source alternative to proprietary container formats. The format became popular among enthusiasts and professionals who needed advanced features like multiple audio tracks, subtitles, and chapters. MKV is now widely supported by many media players and devices.
Technical Specifications
MKV is a container format that can hold video, audio, and subtitle streams. It supports virtually any codec, including H.264, H.265, VP9, AV1 for video, and AAC, MP3, FLAC, Opus for audio. MKV supports multiple audio tracks, multiple subtitle tracks, chapter markers, embedded attachments (like fonts), and comprehensive metadata. The format is open-source and has no licensing restrictions.
Advantages
- Supports multiple audio tracks
- Supports multiple subtitle tracks
- Supports chapters and metadata
- Open-source format
- No licensing restrictions
- Supports many codecs
- Good for archival purposes
Limitations
- May not work on all devices
- Limited support on Apple devices
- Some older players may not support it
- Less universal than MP4
- May require compatible player
- Not as widely known as MP4
Device Compatibility
MKV works well on most modern devices. It's supported by most computer-based media players like VLC, MPV, and Plex. Most modern smart TVs support MKV natively, especially models from 2015 onwards. Game consoles like Xbox and recent PlayStation models play MKV files. The main compatibility gaps are with older hardware players, some set-top boxes, and Apple devices (which may require third-party apps).
Use Cases for MP4 to MKV Conversion
Converting MP4 to MKV is useful for anyone who needs advanced features or better organization. Common uses:
Multiple Audio Tracks
Convert MP4 to MKV to preserve multiple audio tracks. MKV handles multiple audio tracks (different languages, commentary tracks) better than MP4.
Subtitles and Chapters
Use MKV format for videos with subtitles and chapters. MKV supports multiple subtitle tracks and chapter markers with custom thumbnails.
Home Media Servers
Convert MP4 to MKV for home media servers like Plex. MKV provides better organization and playback control for complex media.
Archival Purposes
Use MKV for archival purposes. The open-source format ensures long-term accessibility without licensing concerns.
High-Quality Content
Convert high-quality content to MKV. The format supports very high bitrate content, 3D video, and lossless audio.
Complex Multi-Track Content
Use MKV for complex multi-track content. The format handles multiple audio tracks, subtitles, and chapters elegantly.
Professional Workflows
Use MKV in professional workflows. The format provides better organization and playback control for complex media projects.
Technical Details
MP4 to MKV Conversion
MP4 and MKV are both container formats, not codecs themselves. When converting from MP4 to MKV, the video and audio streams are typically copied from the MP4 container to the MKV container without re-encoding. This means the video and audio codecs remain the same, but the container format changes. This process preserves quality and is usually fast.
Format Limitations
MKV has some limitations compared to MP4: it may not work on all devices, especially older hardware players and some set-top boxes. Apple devices have historically had limited MKV support without third-party apps. However, MKV provides more flexibility and features than MP4, making it useful for advanced users and professional workflows.
MP4 vs MKV
Here's how MP4 compares to MKV:
Feature
MP4 to MKV
MKV
Multiple Audio Tracks
Limited support
Full support
Subtitles
Basic support
Advanced support with formatting
Chapters
Basic support
Full support with thumbnails
License
Proprietary (MPEG)
Open-source
Best For
Universal compatibility, simple sharing
Advanced features, multiple tracks, archival, professional workflows
MP4 to MKV conversion FAQ
Why might I want to convert MP4 to MKV rather than keeping the original format?
MKV (Matroska) offers advantages over MP4 for certain users. It supports many video, audio, and subtitle codecs without the licensing restrictions that sometimes affect MP4. It handles multiple audio tracks, subtitles, and chapter markers well. MKV also supports very high bitrate content, 3D video, and specialized features like lossless audio. If you're creating an archival copy, working with complex multi-track content, or preparing files for home media servers like Plex, MKV provides a flexible container for your video.
Does converting to MKV affect video or audio quality?
Converting from MP4 to MKV typically doesn't affect quality when done properly. The converter preserves video and audio quality while changing the container format. The conversion preserves the original quality of your source file in a different container format. Quality changes may occur if codecs are changed during conversion.
How compatible is MKV with different devices and players?
MKV has good software compatibility. Most computer-based media players like VLC, MPV, and Plex support it. Most modern smart TVs also support MKV natively, especially models from 2015 onwards. Game consoles like Xbox and recent PlayStation models play MKV files. The main compatibility gaps are with older hardware players, some set-top boxes, and Apple devices (which have historically had limited MKV support without third-party apps).
Can MKV handle special features better than MP4?
This is one of MKV's main strengths. It handles multiple audio tracks (different languages, commentary tracks, etc.), multiple subtitle tracks with advanced formatting, chapter markers with custom thumbnails, embedded attachments (like fonts for subtitles), and accurate frame timing. The converter preserves these elements from your source MP4 when available. For complex media with multiple tracks or special features, MKV provides better organization and playback control.
Is MKV a good choice for archiving my video collection?
MKV is good for archival purposes. Its open specification ensures long-term accessibility without licensing concerns. It supports many codecs, including those optimized for quality rather than size. The container format itself adds minimal overhead. MKV's metadata support lets you include detailed information about the content for future reference. For creating a future-proof media library that preserves all aspects of your video content, MKV is a good container format.
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