- Video Editor
  Edit video clips, combine tracks together, and add effects all in one place
- Subtitler
  Add captions and subtitles to videos in the browser
- Speaker Focus
  Auto-resize videos to focus on the speakers
- Audio Editor
  Record, edit, and clean audio for podcasts and videos
- Text to Speech
  Turn text into realistic voiceovers in just a few clicks
- Repurpose Studio
  Turn a video into social-ready clips
- Resize Video
  Change the size and dimensions of a video
- Trim with Transcript
  Edit videos by editing text
- Dubbing
  Translate dialogue into 30+ languages
- Transcribe Video
  Turn videos into text automatically
- View All
  Discover all of Kapwing's tools in one place
- Kapwing AI
  Discover all of Kapwing's AI-powered tools
- Script Generator
  Turn ideas into scripts in a few clicks
- Translate Video
  Make content accessible with translated audio and subtitles
- B-Roll Generator
  Generate relevant, high-quality B-Roll automatically
- Clean Audio
  Enhance audio quality and remove background noise
- AI Video Editor
  Create videos with Kapwing's cutting-edge AI tools
- Clip Maker
  Generate short clips from one video
- Article to Video
  Turn any article into a video in a few clicks
- Video Generator
  Create a video about anything with AI
- Smart Cut
  Automatically remove silences from your video
- View All
  Discover all of Kapwing's smart tools
- For Marketing Teams
  Grow your brand with modern editing tools that speed up content creation
- For Training Teams
  Create and edit screen recordings, tutorials, and instructional videos
- For Schools
  Bring learning to life with digital lessons and multimedia assignments
- Make Social Media Videos
  Create engaging content that's tailored for every social platform
- Make Video Ads
  Create professional, scroll-stopping video ads that generate leads
- Translate Videos
  Reach a wider audience by localizing videos, audio, and subtitles
- Resources
  Articles and guides to help you create more
- Help Center
  Get answers to common questions about Kapwing
- Company Blog
  Follow along for stories from our startup journey
- About Us
  Find out more about our company and product
- Contact Us
  Learn how to get in touch with our team
- Video Tutorials
  Get step-by-step guidance on how to use our tools
- Careers
  Learn more about working at Kapwing
Pricing

KAPWING

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Convert MKV to MP4

Convert MKV to MP4 without sacrificing quality—fast, free, and online. Try our MKV to MP4 convert by uploading a file below.

Upload MKV file

The online MKV to MP4 converter that gives you an MP4 in seconds

The Matroska Video file (MKV) is a multimedia format that stores video, audio, images, and subtitle tracks in a single file. MKV is a free-to-use and open standard format that offers support for a wide range of video and audio codecs.

MKV files are not natively supported by all social networks: Facebook supports MKV, but YouTube, Instagram, and Twitter do not. You'll need to convert MKV files to MP4, or another widely supported format, for those platforms. Fortunately, Kapwing's free MKV to MP4 converter makes it that easy. There's no software to download either—convert MKV to MP4 online in just a few clicks.

The online MKV to MP4 converter that gives you an MP4 in seconds Screenshot

How to convert MKV to MP4

Upload MKV
Upload the MKV file you need to convert to the Kapwing editor. Or, drag and drop the MKV into the editor.
Convert to MP4
Click on 'Export project' in the top right-hand corner of the editor. Select to convert your file to an MP4, then confirm.
Download MP4 file
Your video will automatically download as an MP4 file. That's it, you're done!

Convert any MKV file to MP4, all online

Why do we recommend converting MKV to MP4 files specifically? Kapwing's video converter prioritizes MP4 because the file type a few advantages when it comes to video:

Compatibility: MP4 is widely supported by various devices, operating systems, and media players.
Compression: MP4 uses advanced video codecs which efficiently compress video files without a loss in quality. As a result, MP4 files are usually smaller in size compared to other formats. This helps provide a smooth playback even on slower internet connections.
Flexibility: MP4 can also store audio, images, and subtitles in a single file. This makes it an ideal choice for multimedia content.
Quality: MP4 supports high-quality video resolutions, including 4K, which is becoming the standard for high-definition video.

Discover even more features on Kapwing

Add Subtitles

Generate and customizable captions that automatically sync to your video. Use our AI-powered tool to create a transcript of your video, and then customize your auto-synced subtitles to make them perfect for your content creation needs. Resize, swap out fonts, or add in professional animations and transitions - all your edits will instantly be applied to the entire video.

Subtitle Video

Smart Cut

Smart Cut automates your video editing process by detecting and removing silences from your video in a matter of seconds. You'll be saving hours of editing time and completing your rough cut faster than ever for talking head videos, recorded presentations, tutorials, vlogs, and more. Editing has never been so seamless.

Remove Silences

Resizer

Repurpose videos faster and make them look more professional with our Resize Canvas feature! In just a few clicks, you can take a single video and adjust it to be the right size for every other platform, whether it's for TikTok, YouTube, Instagram, Twitter, Linkedin, or somewhere else.

Resize Video

Background Remover

With Kapwing's smart background removal tool, you can isolate people from the background of a video for free, without a green screen. All it takes is a few clicks. Upload your content, select the Remove Background tool, and use the preview to choose the threshold that best works for you.

Remove Background

Clean Audio

Enhance your project’s audio in seconds with Kapwing. In one click, Clean Audio automatically removes background noise, corrects loudness, and helps reduce popping sounds in your audio and videos. To use it, simply upload a video or audio file, then select Clean Audio on the right side.

Remove Audio Background

Collaborative editing

Work with your team directly in Kapwing. Create and edit content, then send it to share and collaborate with your teammates. Make team workspaces, comment in the editor, and work on videos together in real time or asynchronously.

Start Editing

Trimmer

Edit the length of your video clip by dragging the timeline handles or by using the Split tool. It’s never been easier to cut out silences, rearrange clips, or adjust the length of your audio to fit your video.

Trim Video

Waveforms

Kapwing's customizable waveforms let you bring your audio or podcast content to life. Our Waveform tool creates an automatically-generated, animated graph showing the frequency and amplitude of your audio over time. Choose between a classic waveform style and a stacked “bars” style to bring your own touch to your project.

Add a Waveform

Unlimited Overlays

Make your content pop with image overlays, emojis, progress bars, and audio waveforms. Then simply resize and position them to customize your project. With unlimited overlays, the possibilities are endless.

Add an Overlay

Stock Assets

Browse hundreds of royalty-free images, GIFs, videos, sound effects, and music clips directly in our editor. Curate assets that will bring your project to life, then edit them the way you want to all in one place.

Try Plugins

Templates

Get inspired by hundreds of trendy video templates made to unleash your creativity. Select the template that best suits your project, and then make it your own with custom videos, images, or text. Making professionally designed videos or memes has never been faster.

See All Templates

Frequently Asked Questions

How can I convert MKV to MP4 online?

Converting MKV files to MP4 format online is a straightforward process. There are several online tools available that can help you accomplish this task. One popular option is using an online video converter like Kapwing. Here's a step-by-step guide: 1) Visit Kapwing.com in your browser url bar. 2) Upload your MKV file. 3) Click the 'Export Project' button in the Kapwing editor. 4) Select the MP4 file format. If you follow these 4 easy steps, your file should be automatically downloaded as MP4.

Is there a way to convert MKV to MP4 for free?

Kapwing's MKV to MP4 converter is entirely free to use. You can get started without an account or credit card. And you can always upgrade later for advanced features.

What platforms support MKV files?

Currently, MKV is not supported by many major video platforms. For social media, only Facebook supports MKV—Twitter, YouTube, TikTok, and Instagram do not. You'll need to convert MKV files to something more universal like MP4.

What's the easiest way to convert MKV to MP4?

Kapwing's video converter can convert MKV to MP4 files in just a few clicks. Kapwing's editor is available in your web browser and doesn't require any downloads or plugins to convert video.

What's different about Kapwing?

Easy

Start creating immediately with thousands of templates and copyright free videos, images, music, and GIFs. Repurpose content from the internet by pasting a link.

Free

Kapwing is completely free to start. Just upload a video and start editing. Supercharge your editing workflow with our powerful online tools.

Accessible

Automatically subtitle and translate videos with our AI-powered Subtitler tool. Caption your videos in seconds, so that no viewers get left behind.

Online

Kapwing is cloud based, which means your videos are wherever you are. Use it on any device and access your content anywhere in the world.

No spam or ads

We don't serve ads: we're committed to building a quality, trustworthy website. And we will never spam you nor sell your information to anyone.

Powerful

Kapwing works hard to help make the content you want, when you want it. Get started on your project today.

Trusted by millions of creators all over the world

Rated 4.9 with 4953+ reviews

Rated 4.5 with 1310+ reviews

Rated 4.4 with 203+ reviews

Best online video service ever. And a miracle for deaf people.

[Subtitler] is able to autogenerate subtitles for video in almost any language. I'm deaf (or almost deaf, to be correct) and thanks to Kapwing I'm now able understand and react on videos from my friends :)

Michael Trader

Information Services Freelancer

This tool should be in every social media account managers' bookmark list.

I use this daily to help with video editing. Even if you're a pro video editor, there is no need to be spending hours trying to get the format correct. Kapwing does the hard work for you.

Dina Segovia

Virtual Freelance Worker

It just works!

Kapwing is incredibly intuitive. Many of our marketers were able to get on the platform and use it right away with little to no instruction. No need for downloads or installations - it just works.

Eunice Park

Studio Production Manager at Formlabs

With Kapwing, we're always ready to create.

Kapwing is an essential tool that we use in MOXIE Nashville every day. As a social media agency owner, there's a variety of video needs that my clients have. From adding subtitles to resizing videos for various platforms, Kapwing makes it possible for us to create incredible content that consistently exceeds client expectations. With Kapwing, we're always ready to create - from anywhere!

Vannesia Darby

CEO at MOXIE Nashville

Spend less time learning... and more time crafting stories.

Kapwing helps you spend less time learning complex video editing platforms and more time crafting stories that will connect with your audience and customers. We've used the platform to help create engaging social media clips from our clients' podcasts and we can't wait to see how the platform simplifies this process going forward. If you've learned graphic design with Canva, you can learn video editing with Kapwing.

Grant Taleck

Co-Founder at AuthentIQMarketing.com

It keeps getting better!

Kapwing is probably the most important tool for me and my team. It’s always there to meet our everyday needs in creating scroll-stopping and engaging videos for us and our clients. Kapwing is smart, fast, easy to use and full of features that are exactly what we need to make our workflow faster and more effective. We love it more each day and it keeps getting better.

Panos Papagapiou

Managing Partner at EPATHLON

By the far the most user friendly software to use.

As a housewife at home looking to start a YouTube channel for fun with absolutely zero editing experience, it was so easy for me to teach myself via their YouTube channel. It takes the tediousness out of editing and encourages creativity. As long as Kapwing is around, I will be using their software.

Kerry-lee Farla

Youtuber

Kapwing is my secret weapon!

This is one of the most powerful, yet inexpensive and easy-to-use video editing software I've found. I blow my team away with how fast and efficiently I can edit and turnaround video projects.

Gracie Peng

Director of Content

Kapwing is king.

When I use this software, I feel all sorts of creative juices flowing because of how jam-packed with features the software really is. A very well-made product that will keep you enticed for hours.

Martin James

Video Editor

Love this site.

As an English Foreign Language Teacher, this site helps me to quickly subtitle interesting videos that I can use in class. The students love the videos, and the subtitles really help them to learn new vocabulary as well as better understand and follow the video.

Heidi Rae

Education

Excellent subtitling features

[It] works perfectly for me. Have been using Kapwing for a year or so, and their automatic subtitle tool gets better and better every week, it's rare that I have to correct a word. Keep up the good work!

Natasha Ball

Consultant