Convert MKV to MP4

Transform your flexible open-source video container into MP4 format. Free, private, and browser-based.

How it works

  1. Upload MKV Files — Drag and drop your MKV files into the converter, or click to browse. Common sources: media libraries, blu-ray rips.
  2. Convert to MP4 — The converter processes your files to MP4 format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted MP4 files instantly. For multiple files, download individually or as a ZIP archive.

Why convert MKV to MP4

  • Ensure maximum compatibility — MP4 works on virtually every device and platform
  • Leverage MP4 advantages: universal playback on every platform
  • Overcome MKV limitations: no browser playback support
  • Upload to websites and platforms that require or prefer MP4 format

FAQ

Is MKV to MP4 conversion free?
Yes, Fileza.io converts MKV to MP4 completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting MKV to MP4?
Both MKV and MP4 use lossy compression. Output quality is excellent at high quality settings (85%+) — most people cannot see any difference.

Is it safe to convert MKV to MP4 online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your MKV files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple MKV files to MP4 at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple MKV files at once and they will all be converted to MP4 simultaneously. Download them individually or as a ZIP archive.

Does MKV to MP4 conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted MP4 files be smaller or larger than MKV?
MP4 files are generally smaller than MKV files. The exact reduction depends on your quality settings and the content of your files.

How long does MKV to MP4 conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly. Video files may take longer due to re-encoding.