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Best functions.php plugins for WordPress

The most popular functions.php plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Header Footer Code Manager leads with 600K+ active installs, ahead of FluentSnippets (50K+) and Functionality (1K+). All 5 plugins tagged “functions.php” 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 5 functions.php plugins

  1. 1.
    Header Footer Code Manager

    The most installed functions.php plugin, with 600K+ active installs. Rated 4.9 from 309 reviews, updated 3 months ago.

  2. 2.
    FluentSnippets

    50K+ active installs. Rated 4.7 from 78 reviews, updated 2 weeks ago.

  3. 3.
    Functionality

    1K+ active installs. Rated 4.6 from 12 reviews, last updated 5 years ago. Tested only up to WordPress 5.6.0.

  4. 4.
    中文超级工具箱(China Super ToolS)

    10+ active installs. No reviews yet, last updated 11 years ago. Tested only up to WordPress 4.1.42.

  5. 5.
    Custom Functions Starter Kit by DraftPress

    10+ active installs. Only 1 review so far, last updated 4 years ago. Tested only up to WordPress 6.0.18.

All 5 plugins tagged “functions.php”