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Best co2 plugins for WordPress

The most popular co2 plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Sweet Energy Efficiency leads with 100+ active installs, ahead of Online Leaf (10+) and CO2Track (fewer than 10). All 4 plugins tagged “CO2” 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 co2 plugins

  1. 1.
    Sweet Energy Efficiency

    The most installed co2 plugin, with 100+ active installs. No reviews yet, updated 9 months ago. Tested only up to WordPress 6.9.11.

  2. 2.
    Online Leaf

    10+ active installs. Only 1 review so far, last updated 16 years ago. Tested only up to WordPress 2.9.2.

  3. 3.
    CO2Track

    Fewer than 10 active installs. No reviews yet, updated 7 months ago. Tested only up to WordPress 6.9.11.

  4. 4.
    FFC Football CO2 Calculator Plugin

    Fewer than 10 active installs. No reviews yet, last updated 1 year ago. Tested only up to WordPress 6.8.12.

All 4 plugins tagged “CO2”