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Best custom-functions plugins for WordPress

The most popular custom-functions plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. CodeKit leads with 7K+ active installs, ahead of SafeCode (40+). All 2 plugins tagged “custom-functions” 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 2 custom-functions plugins

  1. 1.
    CodeKit

    The most installed custom-functions plugin, with 7K+ active installs. Rated 4.8 from 16 reviews, updated 3 weeks ago.

  2. 2.
    SafeCode

    40+ active installs. No reviews yet, last updated 5 years ago. Tested only up to WordPress 5.7.21.

All 2 plugins tagged “custom-functions”