Drupal on Pantheon (upgrading to CKEditor 5)


  1. First you need to upgrade to Drupal 9.4.4 or higher. For help with updates on Pantheon Composer driven sites, see Drupal on Pantheon (Build a site with Composer).
  2. Update modules providing additional CKEditor 4 plugins to the latest release of the major version you're on.
  3. Modules that have added CKEditor 5 support should provide support for both CKEditor 4 and 5, and provide an automated upgrade path (for toolbar items and plugin settings) from 4 to 5.

Enable the CKEditor 5 module

Leave CKEditor module enabled.

Convert text formats to use CKEditor 5

  1. Go to Text Formats ⮕ Editors in the Drupal Configuration user interface (usually under admin/config/content/formats) and click Configure for each text format.
  2. Under Text Editor change selection to CKEditor 5 and click Save configuration.
  3. Text formats must be updated one at a time. This will automatically migrate your text format configuration to CKEditor 5.
  4. Disable (old) CKEditor module.
    NOTE: This will change your configuration so make sure your export it