MKV to MP4 Converter — Free, Online, No Upload
MKV is great for desktop playback but blocked by every browser and most CMSs. Converting to MP4 makes the file work in any web video player, social uploader, or editing app.
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Tamaño máximo: ~2 GB (según memoria)
Why use this MKV to MP4 Converter?
- MKV does not play in `<video>` tags — MP4 is the only universal web option.
- Stream-copy works when the underlying codec is already H.264 + AAC (most movie rips).
- For HEVC / AC3 / DTS audio, the converter automatically transcodes the incompatible stream.
- No upload — even multi-GB rips stay on your machine.
How to use it
Drop the MKV onto the converter
The tool inspects the codecs and decides automatically whether to stream-copy or transcode.
Choose MP4 output
For HEVC and DTS, the audio gets converted to AAC; HEVC is converted to H.264 for browser compatibility.
Download and play anywhere
Output works in browsers, social uploads, email attachments, and every modern video player.
FAQ
My MKV has multiple audio tracks — what happens?
The converter keeps the first audio track by default. To select a different track, use the Video Converter directly and toggle the track-picker.
Will I lose subtitles?
Embedded subtitles in MKV are not migrated to MP4 (MP4 has limited subtitle support). Use the Subtitle Burner if you want them visible in the output.
Does this run in my browser?
Yes — the tool uses FFmpeg compiled to WebAssembly. Your file never uploads to a server, never leaves your device, and there is no signup or watermark.