Requirements
Extra Fields for ACF is a lightweight ACF extension. If your site already runs ACF, you almost certainly meet all requirements.
Software
| Requirement | Minimum | Recommended |
|---|---|---|
| WordPress | 5.6 | 6.0+ |
| PHP | 7.4 | 8.1+ |
| Advanced Custom Fields | 6.0 (free or Pro) | Latest |
| MySQL / MariaDB | 5.6 / 10.1 | 8.0 / 10.6+ |
Extra Fields has been tested up to WordPress 6.9.
PHP extensions
No non-standard PHP extensions are required. Everything the plugin uses ships with any modern PHP install: json, mbstring, pcre.
Advanced Custom Fields
ACF (free or Pro) must be installed and activated before Extra Fields. The plugin registers itself as an ACF dependency and will deactivate with a notice if ACF is missing.
You don't need ACF Pro to use Extra Fields. The free version from WordPress.org is enough. Pro field types within Extra Fields require an Extra Fields Pro license — not an ACF Pro license.
Pro license
Extra Fields Pro field types require an active license key entered in Extra Fields → License. The free field types work without any license.
Browser support (admin UI)
The field settings UI targets the same browsers as WordPress core: the two most recent versions of Chrome, Firefox, Safari, and Edge.