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.
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Convert MP4 video files to MKV format directly in your browser. 100% free, private — your files never leave your device.
Convert MOV video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.
Convert WEBM video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.
Convert MKV video files to WEBM format directly in your browser. 100% free, private — your files never leave your device.
Convert MKV video files to AVI format directly in your browser. 100% free, private — your files never leave your device.
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.
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.
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.
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.
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.
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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MOV to MP4
Convert MOV video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.
WEBM to MP4
Convert WEBM video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.
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Converts EPUB files to PDF format — e-readers, mobile devices, and accessible digital books to document sharing, printing, and archival with consistent formatting. All conversion happens locally in your browser with no file size limits.
AVI to MP4
Convert AVI video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.