MKV → MP4
Convert MKV videos to MP4 – locally in your browser
Why MKV → MP4?
Convert MKV videos to MP4 – better compatibility. Directly in browser.
Frequently Asked Questions
Why convert MKV to MP4?
MP4 is supported by all devices and browsers. MKV is more flexible but less compatible.
Are my files safe?
Yes, conversion happens entirely in your browser.
About MP4
MP4 (MPEG-4 Part 14) was standardized in 2001 as ISO 14496-14 and is the most widely used container format for video and audio worldwide. Based on Apple QuickTime format (MOV), MP4 can hold various codecs, most commonly H.264/AVC or H.265/HEVC for video and AAC for audio. The format supports streaming via HTTP Live Streaming (HLS) and Dynamic Adaptive Streaming (DASH), subtitles, chapters, metadata, and multiple audio and video tracks. MP4 is the standard format for YouTube, Vimeo, Netflix, and social media platforms. The broad codec support and compatibility with virtually every device and browser make MP4 the safe choice for video distribution. MP4 files can also contain pure audio (M4A) or images. The ISO Base Media File Format standard on which MP4 is based is also the foundation for 3GP, HEIF, and other container formats.
About MKV
MKV (Matroska Video) is a free, open container format released in 2002 by the Matroska project. Named after the Russian matryoshka doll, MKV can contain unlimited video, audio, and subtitle tracks, chapters, and metadata in a single file. It is the preferred format for high-definition movie archives and offers maximum flexibility in codec choice - from H.264 and HEVC to AV1, from FLAC to DTS and Dolby Atmos. MKV supports subtitles in SSA, ASS, SRT, VobSub, and PGS, menu structures, and chapter markers. The format is supported by VLC, MPC-HC, and most media players but not by iTunes or QuickTime. MKV can also contain attached files like fonts and use ordered chapters for seamless playback. For playback on TVs and streaming boxes, conversion to MP4 is often necessary since these devices typically do not natively support MKV files.
Why convert MKV → MP4?
MKV (Matroska Video) is a flexible open-source container format that can hold virtually any video and audio codec — including multichannel audio, subtitle tracks, and chapter markers. This flexibility comes at a price: many players, smart TVs, and streaming devices can't play MKV directly. Converting to MP4 (usually MP4) creates a broadly compatible version that works on all devices, platforms, and streaming services. MP4 closes MKV's compatibility gap. MP4 is the standard video format for web and mobile with H.264/H.265 video and AAC audio — universally compatible.