Convert MP4 to MKV
Fast, free, and secure MP4 to MKV conversion. No registration required.
Fast, free, and secure MP4 to MKV conversion. No registration required.
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Maintain maximum quality during conversion
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How to Convert MP4 to MKV
Upload MP4 File
Click the "Select File" button to upload your mp4 file from your device.
Start Conversion
Click the "Convert" button to instantly start converting to MKV.
Download MKV
Download your converted mkv file immediately after processing.
Why Convert MP4 to MKV?
Converting from MP4 Video to MKV Video (Matroska) is useful when you need unlimited tracks for audio, subtitles, attachments. MP4 Video has limitations: patent-encumbered codecs (h.264/h.265). MKV Video (Matroska) addresses this by offering unlimited tracks for audio, subtitles, attachments and open-source and royalty-free. MKV (Matroska Video) is an open-source, flexible multimedia container that can hold an unlimited number of video, audio, subtitle, and metadata tracks in a single file.
Xonvert uses professional-grade conversion tools to ensure the highest possible quality when converting MP4 Video to MKV Video (Matroska). The output is optimized for the target format's strengths.
MP4 vs MKV — Technical Comparison
| Feature | MP4 | MKV |
|---|---|---|
| Container | MPEG-4 Part 14 | Matroska (EBML-based) |
| Video Codecs | H.264, H.265, AV1 | H.264, H.265, VP9, AV1 |
| Audio Codecs | AAC, MP3, AC3 | AAC, FLAC, DTS, AC3, Opus |
| Subtitles | SRT, SSA, VobSub | SRT, SSA/ASS, VobSub, PGS |
| Streaming | HTTP Live Streaming (HLS), DASH | — |
| Features | — | Chapters, menus, attachments |
About MP4 Video
MP4 (MPEG-4 Part 14) is the most widely used video container format, supported by virtually every device, browser, and platform. MP4 typically uses H.264 or H.265 video encoding with AAC audio, delivering an excellent balance of quality and file size for streaming, downloads, and playback.
Strengths
- ✓ Universal compatibility (plays everywhere)
- ✓ Excellent quality-to-size ratio
- ✓ Supports streaming and progressive download
- ✓ Stores subtitles, chapters, and metadata
Limitations
- • Patent-encumbered codecs (H.264/H.265)
- • Not ideal for lossless archival
- • Re-encoding reduces quality
- • Container format (quality depends on codec)
Developed by ISO/IEC (2001)
About MKV Video (Matroska)
MKV (Matroska Video) is an open-source, flexible multimedia container that can hold an unlimited number of video, audio, subtitle, and metadata tracks in a single file. MKV is the preferred format for high-quality video with multiple audio languages and subtitle tracks.
Strengths
- ✓ Unlimited tracks for audio, subtitles, attachments
- ✓ Open-source and royalty-free
- ✓ Supports all major codecs
- ✓ Chapter and menu support
Limitations
- • Less compatibility with mobile and smart TV apps
- • Not natively supported by Apple devices
- • Larger than MP4 due to overhead
- • Not ideal for web streaming
Developed by Matroska.org (2002)
MP4 to MKV — Frequently Asked Questions
What is the difference between MP4 and MKV?
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MP4 Video mp4 (mpeg-4 part 14) is the most widely used video container format, supported by virtually every device, browser, and platform. MKV Video (Matroska) mkv (matroska video) is an open-source, flexible multimedia container that can hold an unlimited number of video, audio, subtitle, and metadata tracks in a single file. The key differences are: MP4 Video offers universal compatibility (plays everywhere), while MKV Video (Matroska) provides unlimited tracks for audio, subtitles, attachments.
Will I lose quality converting MP4 to MKV?
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Xonvert uses professional-grade conversion tools to ensure the highest possible quality when converting MP4 Video to MKV Video (Matroska). The output is optimized for the target format's strengths.
When should I use MKV instead of MP4?
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Use MKV Video (Matroska) when you need high-quality video archival or multi-language films and media. Unlimited tracks for audio, subtitles, attachments. Use MP4 Video when web video streaming.
Can I convert MP4 to MKV for free?
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Yes. Xonvert lets you convert MP4 to MKV completely free with no registration. Free users get a daily conversion limit. Upgrade to Pro ($4.99/mo) for higher limits, larger file sizes, and priority processing.
What are the best use cases for MKV?
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MKV Video (Matroska) is best for: High-quality video archival; Multi-language films and media; Anime and media with multiple subtitle tracks; Blu-ray and DVD rips. Unlimited tracks for audio, subtitles, attachments. Open-source and royalty-free.