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Best constants plugins for WordPress

The most popular constants plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Define Constants leads with 40+ active installs, ahead of Debug Bar Constants (20+) and PHP Constants Manager (10+). All 4 plugins tagged “Constants” are below, with figures from WordPress.org that update every day.

Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.

Research this niche or see all plugins.

Top 4 constants plugins

  1. 1.
    Define Constants

    The most installed constants plugin, with 40+ active installs. No reviews yet, last updated 4 years ago. Tested only up to WordPress 5.8.19.

  2. 2.
    Debug Bar Constants

    20+ active installs. Only 1 review so far, last updated 8 years ago. Tested only up to WordPress 4.9.35.

  3. 3.
    PHP Constants Manager

    10+ active installs. Only 1 review so far, updated 2 months ago.

  4. 4.
    WP Config Constants

    10+ active installs. No reviews yet, last updated 11 years ago. Tested only up to WordPress 4.2.39.

All 4 plugins tagged “Constants”