Most people just want an MP4 that plays everywhere—without installing apps or losing subtitles/quality. Existing tools are either heavy desktop apps or ad-heavy sites. We built a lightweight, privacy-first, browser-based converter so anyone can turn MKV into MP4 quickly and safely, with quality and subtitles preserved whenever possible. Privacy-first local processing: conversion runs in your browser; no signup or software, fewer privacy concerns. Lossless when compatible: we copy streams when codecs already suit MP4 (e.g., H.264/AAC), avoiding unnecessary re-encoding. Frictionless UX: one-page flow, clear presets, works on Mac/Windows/iOS/Android and handles large files. That you can get a ready-to-play MP4 in minutes—without installing anything and without giving up privacy—and the result usually keeps the original look and subtitles. It solves a real, everyday problem with a minimal, respectful experience.

MKV to MP4 Converter

Free Online MKV to MP4 Converter

Free Online MKV to MP4 Converter