MKV Cropper

Crop MKV videos easily, right in your web browser!

Crop MKV file

Do you need a free way to crop your MKV videos? Our online editor lets you resize MKV videos to the size and format you need, either by using the Crop sliders or by choosing a preset (or custom!) resolution from the canvas. Crop and edit videos in a matter of minutes, all from your web browser!

MKV Cropper

Convert MKV videos to portrait

Got some MKV videos that you want to convert from landscape to portrait for social media? Use Flixier to get the job done in a couple of clicks and share them online!

Add images, videos and transitions

You can do more with Flixier than crop videos online! Cut videos, trim them, add transitions, motion text and animated overlays, all without ever leaving your web browser.

Convert MKV files to MP4

You can use Flixier to edit your MKV videos and convert them into MP4 in order to be able to play them on any device and share them via instant messaging apps more easily!

Generate subtitles for MKV videos

Click one button to generate subtitles for your MKV files in a matter of seconds and add them to your video or save them separately to your computer.

How to crop MKV videos online:

How to crop MKV videos online:

In order to start cropping your videos, log into your Flixier account, click the Import button and add the videos to your Library from your computer, Dropbox, Google Photos, One Drive or other online platforms.


Create your project, and drag the videos to the Timeline. You can select them and use the Crop sliders on the right side of the screen or click the Cog in the lower right corner of the Canvas to change the resolution and Aspect Ratio.


Once you’ve finished cropping your videos, click the Export button in the top right corner and your video will be rendered in a matter of minutes. You can save it to your computer as well as publish it to up to seven online destinations.

Why use Flixier to crop MKV videos online?

Crop MKV files in a couple of clicks

We made Flixier intuitive and easy to use, so you can crop and edit your MKV videos easily without having to waste time on lengthy tutorials.

Edit videos at lightning speeds

Our cloud-powered technology renders videos in minutes, regardless of the platform you’re on so you can get the job done on a Windows, Mac or Chromebook, all with no installs!

Edit and combine MKV files for free

The free version of our Flixier video editor offers most of the same features our paid one does, so you can try it out and experience the power of cloud video editing without having to pay!

More than an online video cropper

On top of being an online video cropper, Flixier is also a fully featured online video editor which lets you cut, trim and combine video files, insert transitions, add text and images and more!


I’ve been looking for a solution like Flixier for years. Now that my virtual team and I can edit projects together on the cloud with Flixier, it tripled my company’s video output! Super easy to use and unbelievably quick exports.

Steve Mastroianni -

My main criteria for an editor was that the interface is familiar and most importantly that the renders were in the cloud and super fast. Flixier more than delivered in both. I've now been using it daily to edit Facebook videos for my 1M follower page.

Evgeni Kogan

I'm so relieved I found Flixier. I have a YouTube channel with over 700k subscribers and Flixier allows me to collaborate seamlessly with my team, they can work from any device at any time plus, renders are cloud powered and super super fast on any computer.

Anja Winter, Owner, LearnGermanWithAnja

Frequently asked questions.

Frequently Asked Questions

If you have any further questions, Get in touch with our friendly team
If you have any further questions, Get in touch with our friendly team

Can you edit MKV files?

Can you edit MKV files?

Of course! While a lot of traditional video editors do not natively support MKV files, Flixier does! All you need to do is log in and upload your file and then you’re free to start editing as soon as you can!

How can I cut MKV files for free?

How can I cut MKV files for free?

Flixier lets you easily cut MKV files right in your web browser, without having to pay anything! Just log in, upload your file and start cutting and trimming!

Is MKV better than MP4?

Is MKV better than MP4?

No! While MKV might offer more features such as extra audio and subtitle tracks, there is no significant difference in video quality between the two formats.

Is MKV better than MP4?

Is MKV better than MP4?

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