This page provides instructions on how to move from e.g. Drupal 8 to Drupal 9. For moving from prior versions of Drupal such as Drupal 6 and 7, see Upgrading from Drupal 6 or 7 to Drupal 8.

Problem/Motivation This has come in in passing in various places. Drupal core's Update manager now knows if a recommended release is compatible with your currently-installed version of Drupal core or not. See especially [#3102724].

Use to prepare for Drupal 9 # The Drupal 8 version of the module provides all-around support for preparing for your upgrade to Drupal 9. It provides the following key features: Checks if you are using Drupal 8.8 or 8.9, and suggests to update to the latest version. Checks if your system meets Drupal 9's system requirements.

Drupal integrated user interface for Palantir's updated Drupal Rector for easy automated code fix suggestions while upgrading sites. Makes it easy to generate patches for custom and contributed projects without changing anything in the projects analysed. Drupal Rector only has very partial coverage for deprecated APIs so the results should not be considered complete at all. Help is welcome at https://github.com/palantirnet/drupal-rector/issues to expand on the coverage.