MKV to MP4
Converts MKV files to MP4 format — advanced video archiving with multiple subtitle tracks, chapters, and audio streams in one file to universal video playback on any device. All conversion happens locally in your browser with no file size limits.
Runs on FFmpeg
How to Use the MKV to MP4
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Frequently Asked Questions
Why convert MKV to MP4?
MKV (Matroska Video) uses lossless container encoding and is best for advanced video archiving with multiple subtitle tracks, chapters, and audio streams in one file. MP4 (MPEG-4 Part 14) uses lossy compressed encoding and excels at universal video playback on any device — phones, smart TVs, web browsers, and social media. Converting between them lets you take advantage of each format's strengths — for example, using a compressed format for sharing and a lossless format for editing. All conversion happens locally in your browser with no file size limits.
Does converting MKV to MP4 re-encode the video?
No. The converter re-muxes (repackages) the video and audio streams from the MKV container into the MP4 container. The actual video quality, resolution, and bitrate remain identical.
Why is MKV less compatible than MP4?
MP4 is supported by virtually every device, browser, and streaming platform. MKV is open-source and feature-rich but not natively supported by many TVs, game consoles, and mobile devices.
Will the audio tracks survive the conversion?
Standard audio tracks (AAC, MP3, AC3) transfer directly. Some MKV files contain audio formats that MP4 does not support (like DTS or FLAC in certain configurations) — those may be transcoded to AAC.
Can I keep multiple subtitle tracks?
MP4 supports embedded subtitles, but not all players handle them equally. The converter preserves subtitle tracks that are compatible with the MP4 format. External SRT files can be added separately.
What if my MKV has chapters?
MKV chapter markers transfer to MP4 if they use the standard format. Most players will recognize the chapters after conversion. Some MKV-specific metadata may not carry over.
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Last updated October 2026