The Joomla! Extensions Directory ™

K2 Popular ComponentModulePlugin

The powerful awarded content extension for Joomla! with more than 1.2 million downloads so far (and counting!)

K2 provides an out-of-the box integrated solution featuring rich content forms for items (think of Joomla! articles with additional fields for article images, videos, image galleries and attachments), nested-level categories, tags, comments, a system to extend the item base form with additional fields (similar to CCK for those acquainted with Drupal), a powerful plugin API to extend item, category and user forms, ACL, frontend editing, sub-templates & a lot more!

Using K2, you can transform your Joomla! website to a news/magazine site with author blogs, product catalogs, work portfolio, knowledge base, download/document manager, directory listing, event listing & more, all this bundled under one package!

Give K2 a try & you'll instantly love it! It's easy to use and fun to develop websites with! If you need any help or want to contribute to the project, join us at the K2 community.

Since K2 is extensible with additional fields to its base item form, you can easily create category-specific content types, e.g. article, blog post, product page, directory listing.

K2 offers as standard:
- nested-level categories (no section/category restrictions)
- commenting, integrated with Google's reCaptcha & Akismet
- tags
- item image (useful for articles/catalogs)
- image galleries
- videos
- attachments
- user pages (author blogs/user profiles)
- smart ACL for frontend editing
- unique plugin system to extend item, category & user forms
- ajax-based frontend editing
- ajax-based comments moderation
- Google AJAX Search integration
- Rest-like JSON/JSONP content output
- Native advanced SEF options (added in K2 v2.6.4+)

K2 fully supports the Joomla! API, which means all Joomla! plugins will function properly within the K2 component & modules, either in the frontend or backend.

========================,,, Groupama Transport, Harvard, the High Court of Australia, MTV Greece, Jaguar Greece are just some of the thousand "big sites" around the world, fully powered by K2.

To utilize the built-in video & gallery features you need to install AllVideos (free) & Simple Image Gallery Pro, both provided by JoomlaWorks.

K2 is developed by JoomlaWorks & licensed under the GNU/GPL license.

Try K2! Install it, hit the "import" button to bring your Joomla! articles inside K2, start playing with the component to see the flexibility it provides first-hand. Moreover? You no longer need a dozen of components & even more modules to do things like run a news site or a blog. Drupal & Wordpress have certainly met their match now!

Visit the K2 website & community:

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Reviews: 2
A must have for any Joomla site.

I read some of the reviews of people having problems...was a little leary at first...but thank goodness I tried it.

Had a couple little problems...but the K2 forum answered them.

This is a must have.
Reviews: 3
I have really enjoyed using K2. Everything made much more sense to me then the joomla sections and categories. I really like the way that I can section off permissions to the site authors. Thank you for making this!! Also the uberpagebreak extension was fabulous for my site users to post books!
Reviews: 2
It's a steep learning curve, but what a view when you get to the top!
It's an amazing component ... Thanks to all involved in developing this and giving it freely away to the J! community
Reviews: 1
If you can see lightning and hear thunder, you can easily use this component. Hats off to the developers for keeping this one free.
Reviews: 6
I would have given this full marks. K2 is really good!!!! But the learning curve is unnecessarily large.

The documentation is not descriptive enough for people trying to use K2 for the first time. I have a feeling that it has been translated from another language. Thus being a bit disjointed. With better documentation I believe every joomla user out there would be using this and no one would be able to fault K2! confused me more than helped! Playing with the plugin for a couple days is the only way to understand K2.

I'm not missing the point,I'm not a Joomla Newbie,
I have all the facts. This is just constructive criticism. I can't fault K2 otherwise.

Thank for making such a powerful plugin free and accessible to the Joomla community.
Reviews: 1
By all accounts this is a great extension - if you know how to use it. The makers of it have obviously gone to great lengths to create a valuable addition. They have given equally little thought or effort to attempt to explain how to use the extension. The documentation is a joke; clicking on the documentation on this pages goes to one exceedingly feeble webpage that looks like it was thrown together in about 30 minutes; clicking on it elsewhere goes to the strange purple shrouded documentation section elsewhere. If there's some good documentation somewhere I haven't found it. I suggested pulling out whatever good documentation you have, organizing it on a webpage whose design is somewhat synonymous with the excellence of this tool and then sit down and write or have someone write an understandable manual. Then instead of having 60 percent outstanding reviews and 40% absymal reviews you'll have a happy crowd.
Owner's reply

It's a known fact K2 is dead simple to use, even for newbiews. That is beacuse it's similar in structure to the default Joomla! article system.

Let's forget that for a sec... On you can find DOZENS of tutorials, tips and more on K2. Even if you didn't hit the "documentation" or "tutorials" buttons found across all websites, I'm sure it wasn't difficult to spot that huge banner we have on the frontpage of the left column, top, on thw K2 Community... But then again...

Reviews: 8
about a month ago i tried to install K2 on my localhost. it's 2.2 ver. well something happened. i couldn't save my submission neither can't cancel it.
So i came to the website ( and i tried to ask about my problems. too bad. this forum is just to busy so everyone busy with their own problom. i put my post in bugs forum. well i do have some answers but nothing solved.

I almost turned my eyes to another extension, until someday i recognized that i haven't yet ask simon. So then, i go to and gladfully i found my answer. and it solved. simon gave my the hack to solve the problem about the iframe, that makes me desperate. Thanks to Simon.

Now i'm using 2.3 vers. its not stable yet. but its works fine on my site.

so, if you want to use this great extension, u should also warn with the documentasion. and maybe you should ask simon to.
Reviews: 1
I downloaded K2 in the hopes that I would find a solution that would allow me to have articles easily published to the website and allow my users to publish for themselves without me having to give them control to modify content I posted using my standard Joomla settings.

This program not only did not allow me to do what I hoped to do, but it ultimately broke my website. After unpublishing and disabling all content of K2, my site worked fine. When I uninstalled it, my site mysteriously stopped working and went to an error page. Only reinstalling K2 has allowed the site to work again. So now I have this program that is useless to me being a required component to keep my site up, I guess that does make it useful finally.

1)There is NO way to pull up an Article submission form from the frontend with this program. You cannot set this up in your menus from the menu editing Joomla backend. None of the modules link to an article submission form. The Jomsocial plugin for this doesn't do it. And the default Article Submission form doesn't do it. There's just simply no solution I have found for this. And the documentation is backwards and does not address this issue in any way.

2)The backend tools are just not easy or friendly to use. Every other component I have used had configuration options where it is modified directly within the component menus, pretty much the standard setup for a Joomla component. This is backwards as well, because all this stuff is done from the MODULES. This not only doesn't make sense, and makes it a pain to change configurations from this, but also makes things more difficult if people need to modify the modules for specific things so that it does not break the editing options on the backend in the Module Manager for these modules.

3)Unable to find any easy way to import my existing Joomla articles into K2. Every other program I've used that is supposed to complement or extend the functionality of a similar built-in Joomla function allows you to import data into this new item so you can work with it i.e Community Builder and Jomsocial with userlists, but no such luck here. This should be functionality BUILT-IN to the program.

4) I found no features or functionality that I did not already get with Joomla's built in article setups. I downloaded JCE to make the editor easier/better to use and that helps with Article submissions. So this pretty much was nothing but Bloatware for my purposes. Feel free to try it, but make sure it doesnt get integrated too tightly into your site, you might ruin the site if you need to get rid of this.
Owner's reply

You are obviously an impatient Joomla! newbie, so I'll throw in the following facts for you...

First of all, K2 is a standalone component. It does not need any other Joomla! extension to function. It just requires Joomla!. If you uninstalled K2 and your site "broke" I can only guess the following: you uninstalled the component, yet you forgot some menu items pointing to K2.

On to your ramblings now...

1. K2 supports frontend submission by default. Just publish the mod_k2_login module in some position. When you log in through the module, you will see a menu of editing options, including content submission. Set K2's ACL properly and you get a powerful system to handle dozens of writers.

2. What you refer to clearly shows your level of Joomla! knowledge. K2 maintains the "category" display options where it should: in the category. The fact that Joomla! has such options in the menu does not mean it's right. The modules are quite powerful and replace the functionality of at least 20 equivalent non K2 modules...

3. You must be blind, right? The K2 dashboard has a big button top right that says "import Joomla! content". Nothing more to say to that.

4. Of course. Comments, tags, nested categories are all included in Joomla! 1.5...

To finish up, I can either guess 2 things:
a) You either installed K2 and played with it for around 5 mins and that was it.
b) You tried installing K2 on Joomla! 1.6, which is not a stable release and therefore K2 is not yet compatible with it.

My best guess is the latter one...

Reviews: 1
Uumm...I am not sure what anyone means about 'arrogant' and 'superior' owners... that reviewer is out of their mind, or jealous. I've never seen any such thing. Seriously...this is FREE people...and works so well...the programmers GIVE THEIR TIME FOR FREE to make this amazing component for people. If you have a legit complaint about the component, or serious suggestions for improvement, give them that ...but this is just random venting over nothing... to just anonymously criticize the owners in such a lame way is cowardly, and has no true bearing on improving the component so it is also just a waste of everyone's time. I cannot believe that the Joomla admin bothered to even post that?

For myself, I have been using K2 for 6 months now, and I love it. Works perfectly. For the first time in the 5 years that I have used Joomla I don't have to mess with trying to integrate a million different components, modules and plugins to try and get comments, tags, etc... SO easy and clean.

My only suggestion for improvement is the double login at the admin side...maybe I can fix that problem? But I have not figured out how?

And, also the 'main photo'. Perhaps I just have not found out how or where...but I cannot seem to figure out how to make it 'adjust'. What I mean is, I upload the 'main photo' through the upload page (second tab I think) on the article submission form...and then in the article it always appears full size at the top, centered...and the article text can never go around would be nice if we had more power over how that main image was placed and what size it would be, etc.: e.g. left justified, center (as it is now), right justified, etc... ?

Otherwise, great work...keep it up...and please know that most of us DO appreciate all the time and effort that goes into this free component.
Reviews: 1
I am a wordpress developer who want to play with Joomla.So far so good.Comming from wordpress i think k2 can be improved .
My issue are the following
-only a single category per post
-a much nicer tag cloud
-There are just too many options.Would have been good if they were all disabled by default then you can set them when you need.but it is the oposite and it is very fustrating to have to unset so many options in the admin.
-An email on user comment would also be nice.
Reviews: 2
Just to explain: My rating isn't for the software. I had installed it without issue, and was just getting the hang of its operation.

The documentation isn't bad (no matter what others may say), but it can be confusing to learners. The docs assume that you are mildly tech-ish...which is great for some, but it reads like gibberish to others. No worries.

I doubt this will even be posted, but the attitude of "The Owners" has me put off a bit. Obviously unable to take criticism and then launching into snarkish comments isn't the best way to win public support. Sometimes 'users' may irritate you with questions, or fire out a complaint without really knowing what they're talking about, but that doesn't give free license to condescend or feel 'superior'. And THAT is what comes across more than anything in the Owner's Comments: They feel superior.

Well, I assure you that a lot of people out here aren't inferior, and it would benefit whatever business you're in to realize that. Learn how to take it on the chin, even when people are wrong. Try to educate without being a jerk about it. And then you'll have a loyal following. As of right now, I've decided against using the software as my own personal boycott. It's a shame too...the software is pretty good. But it's not the only game in town. I'd work on remembering that if I were they.
Owner's reply

Since your comment was indeed published on the JED -although it's not referenced to the extension itself- it would be more practical and/or helpful to provide some links of such arrogant behavior (to further strengthen your point) instead of just calling the K2 team arrogant... Cause I doubt you'll find any... If we were arrogant or feeling superior, we'd keep K2 to ourselves and NOT
a) spend half of our coding time to K2 or
b) give it away for free or
c) support it for free

Guess you never thought of these things, right?

Reviews: 4
nowadays front-end editing, and joomfish integration is a must if you want to make a site other than english.
and front-end editing should be a standard.
also i don't like, that it separates itself from the core articles, and doesn't have it's own advanced search :(
it is nice, and all, but it if you want multilingual content, or frontend editing for the client, this is not a good choice :(
Owner's reply

Looks like you've never used K2, because if you did, you'd see that BOTH frontend editing and Joom!Fish support are standard K2 features since day 1 of its release...

Reviews: 2
Very simple, K2 can do things that Joomla alone just can't. Endless category nesting, endless Template and Module overrides, integrated tag system to select across categories regardless of their inheritance structure, ACL not limited to 7 user groups, but endless groups and object related, just to mention a few. Newbies may get depressed at first ( and write some bad reviews ), having a decent PHP and HTML-CSS base is the only way to understand how amazing and powerful this extension is, and never build another site without it ( it just wouldn't make sense ).
Learning curve: Not so easy, but trust me, it's worth every hour you spend on it. For those who think there is too much stuff , too complex, in no time you'll find out how many things are still missing.
Thank you, you are a great team.
Reviews: 1
This is a wonderful extension...the built in commenting and user management and attachments and extra fields are just what I've been looking for. At the last minute on completing a project, I switched back to Joomla core. There is a pecular url problem that I could not find a satisfactory answer for on any forum. I am using basic Joomla SEF, and depending on where I clicked an item link in my site, it made different urls for the item. Example: Clicking an item link from my home page went to "" . Clicking on item from my Article category went to "". (these are abbreviated for example only). If I am missing something, please let me know. Consistent URLs are important to me, but maybe I am wrong. Thanks. It's a great extension and was not hard to figure out.
Owner's reply

K2 uses Joomla's built in mechanism to produce the SEF URLs. What you're noticing however is links being created from content which is not assigned to some menu item. If your site has a solid menu structure reflecting most of your K2 categories, then all your links will follow a specific naming pattern. It's all a matter of setting up your content. Additionally, you can use a component like sh404SEF to produce even better URLs regardless of menu structure.

Reviews: 2
it is good component with many features specially for blogging. I moved my blog articles from standard Joomla Categories to K2 Categories as Blog Items because K2 provides more features for photo editing, K2 tools have calendar & Tag-Clouds features too.
Only issue I am facing is that essential core Joomla Blogging Plugins like XML-RPC Joomla, XML-RPC Blogger API do not support K2 at all.
even some third part Plugins like XML-RPC-metaWeblog API don't work with K2. So I can't Post to my Joomla Blog from other services if my joomla Blog is published as a K2 item. Even ScribeFire (Firefox add on)does not pick K2 items unless it is publish as a standard Joomla Article.
is there any solution to this...
Owner's reply

I think the best thing to do here is just ask the developers of those extensions to add support for K2 :)

Reviews: 2
I was more looking for something that was going to integrate with Joomla's content items--not be a CMS all in and of itself. I simply want to add a few fields to Joomla's content items, not have to essentially use a 3rd party to manage my content. What's the point of installing Joomla at this point? If you're managing everything with K2.

Also, it lets you add extra fields, but it doesn't seem to let you add extra image fields that I can tell.
Reviews: 12
K2 is the component that brings Joomla! to the game for great blogging and content management.

Works smooth and has lost of uses on article display.

I hope this is the beginning and will get better.

If I could have a wishlist I would like to have on mouse over effects over the category item display..

Hope the next version have it out of the box!
Reviews: 20
As Joomla user of just under a year, I've been looking for a comparable extension that would give me the function of my beloved CCK in Drupal. After trying several, including JSE, Zoo, Flexi... I came upon K2. I was using Frontpage Slide Show in Drupal. Now I'm using it in Joomla, as well as AllVideos, Tabs and Slides, UCD and Simple Image Gallery. So nnedless to say, I knew anything from JoomlaWorks would be awesome!

K2 does have a little learning curve when compared to Drupal's CCK, but nothing major. You have to learn all extensions, right? Anyway, it does what I needed. Installs perfectly. Setup and config isn't terribly difficult and the results are fantastic.

I could go into deep details, but why? Let me just assure you that if you're looking for the best CCK mod, especially if you've used Drupal's awesome CCK, then K2 will make you smile!

Way to go JoomlaWorks!!!
Reviews: 2
Why does it rock?
It rocks because it works out of the box.
It rocks because it does what it says.
It rocks because it doesn't stand alone on its island and integrates more and more with other extensions (and templates).
It rocks because the Joomla! community said so (JandBeyond J.O.S.C.A.R.).
It rocks because it was built to attend 'real people' needs.
It rocks because the end users (who actually update the site) love it... because it makes their lives easier.

And last but not least...
It rocks because it has a great team behind it (and that count tons when you pick an extension as powerful as this one).
Reviews: 4
If you're not serious about content management, don't even download K2, it's not for you. If you are and you're willing to invest a few hours today to save weeks of your time in the long run, K2 is perfect for you.

K2 is one of the most mature content management components for Joomla!. It does have a steep learning curve, mostly due to the sheer amount of options (and a somewhat disorganised documentation section). However, investing time in it will most certainly pay back! Each of those daunting options will quickly become your best ally to building a news site, your documentation section, a downloads directory, an e-shop, ... You name it, K2 can do it!

I was a skeptic when I first tried it. Now, I can't imagine building any kind of site without K2. The fact that this extension won the J.O.S.C.A.R. award at J and Beyond 2010 just speaks for itself.
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