MP4 to MKV

Convert MP4 to MKV online with a free MP4 to MKV converter.
Drop your MP4 video files below to convert them to MKV in seconds.

Or drag your images here

Looking to programmatically convert MP4 to MKV?

Sign up for our free API to convert all your videos to MKV and other formats for optimal web delivery.

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Free MP4 to MKV Converter

Easily convert MP4 to MKV online instantly and effortlessly. No installation or plugins required. Simply drop your MP4 video into our converter and receive a MKV file in seconds with high-quality playback.

Why choose our MP4 to MKV converter?

Domain Specific AI

AI-Powered Video Transformations

Go beyond simple conversions. Transform your videos with features like Generative Fill, Object Removal, and Scene Replacement, adding flexibility and creativity to your video content.

Domain Specific AI

Video Enhancement

Enhance video quality with tools for 4K resolution, real-time filtering, and frame rate adjustment. With Cloudinary’s API, your videos look stunning and ready for any screen.

Domain Specific AI

Performance Optimization

Deliver videos in the best quality and format, adapting automatically to the user’s device, browser, and network. Automatically apply the most efficient format for seamless playback.

Domain Specific AI

Batch Convert MP4 to MKV

Use the converter to batch convert MP4 to MKV, or sign up for the free API to automatically convert all your MP4 videos to MKV!

Domain Specific AI

Workflow Automation

Create workflows that automate video processing, ensuring videos are formatted and ready for fast delivery right after upload.

Domain Specific AI

Versatile Video Format Support

Handle all major video formats: MOV, MP4, AV1, WEBM, HEVC, and more. Ensure your videos are delivered in the best format for quality and efficiency.

How to Convert MP4 to MKV

Convert MP4 to MKV in 3 simple steps, or sign up with Cloudinary to programmatically transform thousands of videos!

1. Add Your MP4 Files

Upload or drag and drop your MP4 files into the browser.

2. Start Conversion

Select MKV as your output format to begin the conversion

3. Download MKV Videos

Once the conversion is complete, download your new MKV files

Or sign up for an API

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Explore Beyond MP4 to MKV Conversion

A woman and a golden retriever in the mountains. They're sitting, facing away from the camera while the dog noses the woman. They're surrounded by natural splendor including majestic mountains, puffy clouds, and evergreen-studded hills. — An un-cropped image overlaid with a cropping window showing how it would be cropped by Cloudinary.

Original: 18 MB
We’re showing a resized version of the original asset to avoid slow loading speeds. View the original.

JPEG: 135 KB
WebP: 135 KB
AVIF: 90 KB
JPEG XL: 94 KB

Original: 18 MB
We’re showing a resized version of the original asset to avoid slow loading speeds. View the original.

JPEG: 135 KB
WebP: 135 KB
AVIF: 90 KB
JPEG XL: 94 KB

Duration: 1:42

Duration: 0:15

URL:

/ar_0.5,c_fill,g_auto,w_433/q_auto/f_auto/hiking_dog_mountain.jpg

cloudinary.image("hiking_dog_mountain.jpg", {transformation: [
  {aspect_ratio: "0.5", gravity: "auto", width: 433, crop: "fill"},
  {quality: "auto"},
  {fetch_format: "auto"}
  ]})

new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));

new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));

new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));

new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));

CloudinaryImage("hiking_dog_mountain.jpg").image(transformation=[
  {'aspect_ratio': "0.5", 'gravity': "auto", 'width': 433, 'crop': "fill"},
  {'quality': "auto"},
  {'fetch_format': "auto"}
  ])

(new ImageTag('hiking_dog_mountain.jpg'))
	->resize(Resize::fill()->width(433)
->aspectRatio(0.5)
	->gravity(
	Gravity::autoGravity())
	)
	->delivery(Delivery::quality(
	Quality::auto()))
	->delivery(Delivery::format(
	Format::auto()));

cloudinary.url().transformation(new Transformation()
  .aspectRatio("0.5").gravity("auto").width(433).crop("fill").chain()
  .quality("auto").chain()
  .fetchFormat("auto")).imageTag("hiking_dog_mountain.jpg");

cl_image_tag("hiking_dog_mountain.jpg", transformation: [
  {aspect_ratio: "0.5", gravity: "auto", width: 433, crop: "fill"},
  {quality: "auto"},
  {fetch_format: "auto"}
  ])

cloudinary.Api.UrlImgUp.Transform(new Transformation()
  .AspectRatio("0.5").Gravity("auto").Width(433).Crop("fill").Chain()
  .Quality("auto").Chain()
  .FetchFormat("auto")).BuildImageTag("hiking_dog_mountain.jpg")

cloudinary.image('hiking_dog_mountain.jpg').transformation(Transformation()
	.resize(Resize.fill().width(433)
.aspectRatio(0.5)
	.gravity(
	Gravity.autoGravity())
	)
	.delivery(Delivery.quality(
	Quality.auto()))
	.delivery(Delivery.format(
	Format.auto())));

imageView.cldSetImage(cloudinary.createUrl().setTransformation(CLDTransformation()
  .setAspectRatio("0.5").setGravity("auto").setWidth(433).setCrop("fill").chain()
  .setQuality("auto").chain()
  .setFetchFormat("auto")).generate("hiking_dog_mountain.jpg")!, cloudinary: cloudinary)

MediaManager.get().url().transformation(new Transformation()
  .aspectRatio("0.5").gravity("auto").width(433).crop("fill").chain()
  .quality("auto").chain()
  .fetchFormat("auto")).generate("hiking_dog_mountain.jpg");

cloudinary.image('hiking_dog_mountain.jpg').transformation(Transformation()
	.resize(Resize.fill().width(433)
.aspectRatio(0.5)
	.gravity(
	Gravity.autoGravity())
	)
	.delivery(Delivery.quality(
	Quality.auto()))
	.delivery(Delivery.format(
	Format.auto())));

cloudinary.image {
	publicId("hiking_dog_mountain.jpg")
	 resize(Resize.fill() { width(433)
 aspectRatio(0.5F)
	 gravity(
	Gravity.autoGravity())
	 })
	 delivery(Delivery.quality(
	Quality.auto()))
	 delivery(Delivery.format(
	Format.auto())) 
}.generate()

new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));

Frequently Asked Questions

Get Answers to Your Questions About Our Chat Software and Features

What is MP4?

MP4, or MPEG-4 Part 14, is a digital multimedia format commonly used for storing video, audio, and other data, like subtitles and still images. Created by the Moving Picture Experts Group (MPEG), it is one of the most versatile and widely supported file formats, compatible with nearly all media players and devices. MP4 is known for its efficient compression, allowing high-quality video and audio to be stored in relatively small file sizes, which makes it suitable for streaming and downloading over the internet without significantly impacting quality.

The format’s versatility is one of its key strengths, as it can store various multimedia types, including advanced content like 3D graphics and interactive media. MP4 is often the go-to choice for video platforms, smartphones, and online streaming due to its reliability, quality preservation, and compatibility with different operating systems and platforms. It also allows for easy distribution and playback, making it a standard for most media uses, from professional video production to everyday video recording and sharing.

What is MKV?

MKV, or Matroska Video, is an open-source multimedia container format that is highly versatile and widely used for video content. Unlike many other formats, MKV can store multiple video, audio, and subtitle tracks in a single file, making it popular for content that requires multiple language options or different audio formats. It is often the format of choice for high-definition video, especially when quality and customization are a priority. As an open-source project, MKV is also free to use and does not require licensing fees, which has contributed to its widespread adoption by both video enthusiasts and professional content creators.

One of the standout features of MKV is its adaptability and compatibility with a wide range of codecs, allowing users to achieve high-quality video playback with relatively efficient file sizes. It is supported by most modern media players, such as VLC and Plex, though it may require additional codecs or software for full compatibility on some devices or platforms. Because of its ability to preserve video quality while integrating multiple media types within one file, MKV is often preferred for large, high-quality videos like movies and series. However, it is less suitable for online streaming or mobile use compared to formats like MP4, which are more universally supported across all devices and platforms.

How to Batch Convert MP4 to MKV?

1. Select MP4 File

Gather all the MP4 videos you wish to convert and upload or drag and drop them into a batch conversion tool like Cloudinary.

2. Choose MKV as Output Format

In the converter, select MKV as the output format for your videos.

3. Start the Conversion

Begin the batch conversion process. The tool will automatically convert all selected MP4 videos to MKV.

4. Download Converted Videos

Once the batch conversion is complete, download the converted MKV files directly to your device.

To streamline the process, sign up for Cloudinary’s API to automate video conversions and easily transform any format into MKV or other video formats.