Tools/Compress MKV

MKV Compressor

Compress MKV files online with our free MKV compressor.
Drop your video files below to quickly compress MKV videos and make them smaller without losing quality.

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Looking to programmatically compress MKV video?

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

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Free MKV Compressor & Converter

Easily convert and compress MKV files online instantly and effortlessly.
No installation or plugins required. Just drop your video into our MKV compressor and receive a smaller MKV file in seconds with high-quality playback.

Compress MP4

Why choose our MKV compressor?

AI-Powered Video Transformations

Not only can you compress MKV files to make them smaller for easier sharing and storage,
but you can also transform your videos with advanced features like Generative Fill, Object Removal,
and Scene Replacement—adding flexibility and creativity to your video content.

Video Enhancement

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

Performance Optimization

Deliver videos in the best quality and format, adapting automatically to the user’s device, browser, and network.
With our compressors, the most efficient format is applied automatically for seamless playback.

Batch Convert videos to MKV

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

Workflow Automation

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

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 compress MKV video

Compress MKV videos in 3 simple steps, or sign up with Cloudinary to programmatically compress thousands of videos!

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Add Your video Files

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

Start Compression

The compression will start to adapt to the format.

Download Compressed Videos

Once the conversion is complete, download your compressed MKV files

Explore Beyond MKV Compression

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.
An arrow pointing from the original asset to the cropped asset
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.
The same asset cropped using the following settings: Aspect Ratio: 1:2. Crop Mode: Content-Aware.
Images
Videos
Crop Mode
Aspect Ratio
Original
18 MB

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

The original asset:
JPEG
135 KB
WebP
135 KB
AVIF
90 KB
JPEG XL
94 KB
The image after being optimized using the following settings: Quality: Auto. Width: 1000px.
Original
18 MB

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

The original asset:
JPEG
135 KB
WebP
135 KB
AVIF
90 KB
JPEG XL
94 KB
The image after being optimized using the following settings: Quality: Auto. Width: 1000px.
Images
Videos
Quality
Width
An un-cropped image overlaid with a croppingai window showing how it would be cropped by Cloudinary.
An arrow pointing from the original asset to the cropped asset
The same asset cropped using the following settings: Aspect Ratio: 1:1. Crop Mode: Content-Aware.
Images
Videos
Crop Mode
Aspect Ratio
The original image:
An arrow pointing from the original asset to the transformed asset.
The personalized image:
The original image:
The personalized image:
Product Photos
Backgrounds
Overlays
Duration
Full length video: Surfing Trip
An arrow pointing from the original video to the AI-generated preview.
Duration
A shorter video preview generated by Cloudinary's AI using the following settings: Duration: 15 seconds. Max Clips: 9. Min Clip Length: 1 second.
Videos
Duration
Max Clips
Min Clip Length
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()));
GET STARTED
GET STARTED
GET STARTED
GET STARTED

Frequently Asked Questions

Get Answers to Your Questions About Our Chat Software and Features

To compress MKV files with Cloudinary, you can upload your video through the Media Library or API, then apply transformation parameters such as quality:auto, f_auto, and advanced video codecs like vc_h265. The Compress MKV tool helps reduce file size while preserving video quality, making your MKV assets faster to load and more efficient to stream across devices and browsers.

Absolutely! Cloudinary lets you create transformation presets or named transformations that include your preferred compression settings. This makes it easy to upload and compress MKV files automatically at scale. Whether you’re handling video uploads from users or managing your own content, this ensures every MKV file is optimized for delivery as soon as it’s uploaded.

In 2025, the most effective way to compress MKV files is by using Cloudinary’s intelligent media optimization stack. This includes enabling automatic quality selection (q_auto), using modern codecs like AV1 or H.265 (vc_av1, vc_h265), and delivering in the most efficient format with f_auto. These tools ensure your MKV compression strategy meets today’s performance and bandwidth demands across web, mobile, and OTT platforms.