Online MKV Compressor for Smaller Video Files
Compress large MKV videos and screen recordings instantly, right in your web browser. Flixier compresses your files directly on your computer without any uploads or installs.
Over 1 million creators use Flixier every day including brands like:
How to Compress MKV Online
Compress Your Large MKV Videos Without The Hassle
Lower MKV File Sizes
Stop waiting for hours to send clips to friends or coworkers. Flixier’s on-page video compressor compresses massive files down to a fraction of their original size. You can quickly compress MP4, MOV, and other formats on top of MKV.
Convert Videos to MP4
Make your videos compatible with any device. You can easily convert MKV to MP4 afterwards to fix compatibility issues. This ensures your clips open instantly on social media and editing tools without annoying playback errors.
Trim Clips Before Saving
Cut out the fluff from your recordings before you save your newly compressed file. Click Edit in Flixier if you want to edit videos online and cut long pauses, or generate subtitles automatically.
Keep Videos Private
Protect your sensitive data and personal footage with local browser processing. Your videos never leave your computer or upload to a random server. Enjoy maximum privacy and fast loading times without getting slowed down by your internet speed.
Everything you need to create
and finish AI videos
Who this is for
Marketers
Resize massive campaign files and video assets to keep them light enough for email attachments or presentation slides. Keep your marketing projects moving fast.
See How It WorksEducators
Business Owners
Social Creators
Still have questions?
We got you!
How do I compress an MKV file for free?
Simply drop your video file into the compression tool right inside your web browser. Choose your preferred file size or quality settings, and Flixier will compress the clip instantly. You can download the smaller file immediately without paying any fees or upgrading your account.
Can I compress a large MKV file with no size limit?
Yes. Since the compression tool processes everything directly on your own computer instead of uploading to a server, there are no file size limits. You can compress massive multi-gigabyte videos or hours of screen recordings without getting blocked by a progress bar.
Will compression reduce my MKV quality?
Our tool tries to balance file size reduction with visual clarity so your videos still look sharp. Flixier’s compression algorithms remove unnecessary bloat from heavy MKV files while preserving the actual picture quality, giving you a much smaller file that still looks great on any screen. Of course, however, it all depends on much you’re trying to shrink your video.
Is my MKV file uploaded anywhere?
No, your file is never uploaded to an external server during compression. The entire process happens locally inside your web browser, meaning your video stays completely safe, secure, and private on your own device.
Can I convert MKV to MP4 instead?
Yes. When you compress your video with Flixier, you can save the finished file as an MP4. This makes it incredibly easy to share your clips with others, since MP4 files work perfectly on almost every smartphone, tablet, computer, and social media platform.
