Best duplicate checker plugins for WordPress
The most popular duplicate checker plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Duplicate Title Validator leads with 300+ active installs, ahead of Plagiarism Checker (10+). All 2 plugins tagged “duplicate checker” 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.
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Top 2 duplicate checker plugins
- 1.
Duplicate Title ValidatorThe most installed duplicate checker plugin, with 300+ active installs. Only 4 reviews so far, updated 2 months ago.
- 2.
Plagiarism Checker10+ active installs. No reviews yet, last updated 3 years ago. Tested only up to WordPress 6.3.14.
All 2 plugins tagged “duplicate checker”
Duplicate Title Validator
Up in the last 7 days:165#10,223by hasan movahed2 months ago
Prevents publishing posts with duplicate titles across all post types and taxonomies. Works with both Gutenberg and Classic Editor.
- Installs
- 300+
- Rating
- 5.0(4)
- Downloads
- 11/day
Plagiarism Checker
#32,027by plagibot3 years ago
Plagiarism Checker by Plagibot: easily scan your posts for plagiarism before they are published. See results in real-time within seconds.
- Installs
- 10+
- Rating
- –
- Downloads
- 0/day