Are Joomla custom fields the same as K2 extra fields?

Same job, different system. Both attach typed data to content. Custom fields are core, work on Joomla 5 and 6, and use category assignment plus Automatic Display. Extra fields die with K2.

Do I create fields before or after I migrate K2?

Let the migrator create them from published extra fields, then adjust display and assignment. Creating a parallel set by hand first causes duplicate names and empty values. Manual field setup is for sites that never used K2.

Why is the Fields tab missing on a new article?

No category is selected yet, or the field is not assigned to that category. Choose the category. Check assignment. Remember Uncategorised is outside All.

Can I show a field only in an override, not above the article?

Yes. Set Automatic Display to Do not automatically display , then print the field in a child-template layout.

Will custom fields survive a Joomla 5 or 6 upgrade?

Yes. They are com_fields . K2 extra fields will not, because K2 will not. That is why the K2 migration runs on Joomla 3.10 first.

Can I use custom fields on contacts or users too?

Yes. Those are different contexts (Contacts → Fields, Users → Fields). Article fields do not automatically appear on contact forms. Create fields in the context you need.

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Joomla Custom Fields: The K2 Extra Fields Replacement

Core custom fields replace K2 extra fields on Joomla 4, 5, and 6. Create groups, assign categories, pick Automatic Display, then finish a K2 copy.

Abhilash Sahoo

Aug 22, 202610 min read

Joomla Custom Fields: The K2 Extra Fields Replacement

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Written by

Abhilash Sahoo

Abhilash Sahoo, with over 16 years of experience, is Founder & CEO of Infyways Solutions. He builds web platforms and eCommerce on Joomla, WordPress, Shopify, Magento, and OpenCart, plus modern stacks like Next.js, React, Node.js, and Python, with AI agents, automation, and headless CMS when products need to scale.

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Joomla Custom Fields: The K2 Extra Fields Replacement

Frequently asked questions

Abhilash Sahoo

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