Craft 4 stopped getting security fixes on April 30, 2026.

Craft 5 treats almost everything as an entry. Categories, tags, and global sets can be converted to entries with Craft's built-in entrify commands. It's optional, and it simplifies your content model, but it changes how templates find that content. We decide with you whether to convert during the upgrade or leave it for later.

Matrix blocks are no longer their own element type. They become nested entries, and block types become entry types. The upgrade converts the data for you. Templates and custom code that queried blocks directly have to be updated, and that is where most of the template work in a 4 to 5 upgrade lives.

Craft 5's Matrix can nest, so Super Table's main job goes away. Verbb ships a migration that converts Super Table fields to Matrix (php craft super-table/migrate). Neo fields need their own decision based on how your content is structured.

Redactor isn't really going forward on Craft 5. The official CKEditor plugin includes a converter (php craft ckeditor/convert/redactor) that moves your rich text fields across. Custom Redactor configs and toolbar plugins get rebuilt in CKEditor by hand.

Craft 5 needs PHP 8.2 or later, and MySQL 8.0.17+, MariaDB 10.4.6+, or PostgreSQL 13+. The latest Craft 4 release runs on the same stack, so the server can be upgraded first, separately, before Craft itself moves.

Every plugin needs a Craft 5 release. Most well-maintained ones have one. The rest get replaced, rewritten as a small custom module, or removed if nobody actually uses them anymore.