Best keyword density plugins for WordPress
The most popular keyword density plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. SEO Content Helper leads with 30+ active installs, ahead of Keyword Counter And Density Calculator (10+) and Melioo Keyword Density (fewer than 10). All 4 plugins tagged “keyword density” 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 keyword density plugins
- 1.
SEO Content HelperThe most installed keyword density plugin, with 30+ active installs. Rated 4.8 from 5 reviews, last updated 13 years ago. Tested only up to WordPress 3.5.2.
- 2.
Keyword Counter And Density Calculator10+ active installs. Only 1 review so far, last updated 10 years ago. Tested only up to WordPress 4.5.33.
- 3.
Melioo Keyword DensityFewer than 10 active installs. No reviews yet, updated 1 week ago.
- 4.
Relevant Density Optimizer (RDO)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 “keyword density”
SEO Content Helper
Down in the last 7 days:372#24,135by Jenst13 years ago
Helps you write great content with search engines in mind. Keyword distribution and keyword density will help you.
- Installs
- 30+
- Rating
- 4.8(5)
- Downloads
- 0/day
Keyword Counter And Density Calculator
#48,355by Miina Sikk10 years ago
The Keyword Counter & Density Calculator plugin calculates how many times and how commonly each keyword is used in a post or a page.
- Installs
- 10+
- Rating
- 1.0(1)
- Downloads
- 0/day
Melioo Keyword Density
Down in the last 7 days:3,721#73,229by marlonk11 days ago
See which 1–5 word phrases repeat in the post you are editing, so you can check keyword focus and trim repetition. Runs in your browser.
- Installs
- <10
- Rating
- –
- Downloads
- 0/day
Relevant Density Optimizer (RDO)
Down in the last 7 days:5,587#73,875by Constantin Oesterling1 year ago
Optimize your content's SEO by highlighting important terms and analyzing their density in your WordPress posts and pages.
- Installs
- <10
- Rating
- –
- Downloads
- 2/day