Skip to content

MKV to MP4 converter

  • Runs on your device
  • Works offline once loaded

Make MKV files play on phones, TVs and editors that prefer MP4. The video is re-encoded on your device to H.264 with AAC audio, with options to lower the resolution.

How it works

  1. Drop your videos.
  2. Choose the format and any resize, crop or rotate options.
  3. Download the converted videos.

Why use it

  • MP4 with H.264.
  • Resolution and frame rate options.
  • No watermark.
  • Private.

Questions and answers

Can any MKV be converted?

Those whose codecs your browser can decode, which covers most common files.

Are subtitles kept?

Subtitle tracks are not carried over.

Related guides

Video and audio6 min read

GIF vs MP4 vs WebM: the same clip in each format

We turned a camera clip and a screen recording into a GIF, an MP4 and a WebM at the same size. The GIF was up to 16 times larger and still looked worse. Here is why, and when a GIF is still the right choice.

Video and audio7 min read

How to compress a video: what each setting really does

A video's size is its bitrate times its length, and every setting works through that. We compressed two full HD clips at every setting and measured the size and quality of each result, including the usual advice to lower the resolution.

Privacy and security6 min read

Do online converters upload your files?

Most online converters send your file to a server; some do the work in your browser instead. Here is how to tell which kind a site is in about a minute, and what every request looked like when we converted a photo on our own site.

Esc