MKV to MP4

Convert MKV video to MP4 format online for free. Make Matroska videos play on any device, phone, or TV without any software.

or click to browse from your device

File is too large. The limit is 100 MB.

Supported: .mkv (Max 100 MB)

loop

Uploading & Converting...

0%

check_circle
Conversion Complete!

Error

info About this tool
Convert MKV (Matroska) videos to the universally compatible MP4 format. MKV is the most popular container for high-definition video downloads: it supports multiple audio tracks, subtitles, and chapters in a single file. The catch is that MKV is not natively supported by iPhones, many Smart TVs, WhatsApp, or most social media upload forms. Converting to MP4 solves this immediately: the video and audio streams are remuxed into an MP4 container without re-encoding, so the process is nearly instant with zero quality loss.

File size: MP4 output is nearly identical in size to the source MKV since streams are copied without re-encoding in most cases.

Quality: When MKV contains H.264 video and AAC audio, streams are copied with no quality loss. If the MKV uses Opus or Vorbis audio, audio is re-encoded to AAC at 192 kbps.

format_list_numbered How to convert
  • 1
    Upload your MKV video file.
  • 2
    The converter remuxes the video and audio into an MP4 container.
  • 3
    Download the MP4, which plays natively on any iPhone, Android, Smart TV, or browser.
help FAQ

Will there be any quality loss?

No. When the MKV contains H.264 video and AAC audio (the most common case), the streams are copied directly into MP4 without re-encoding. Zero quality loss, very fast.

What if my MKV has multiple audio tracks or subtitles?

The converter keeps the first audio track and drops embedded subtitles and extra tracks, producing a clean single-stream MP4 for maximum compatibility.

Why will my TV not play MKV?

Most Smart TVs do not support the MKV container natively, even if they can decode H.264 video. MP4 is the universal container supported by all TV brands.
lightbulb Common use cases
  • check_circle Playing downloaded MKV movies on an iPhone or iPad
  • check_circle Sending a video via WhatsApp or iMessage that only accepts MP4
  • check_circle Uploading a video to YouTube, Instagram, or TikTok
  • check_circle Making MKV files play on a Samsung, LG, or Sony Smart TV
compare_arrows Related converters