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Static Suffix – Site Wide .html Extension
v1.1.1 · by Rishabh Gupta
Appends a .html suffix to the permalinks of selected post types and taxonomies.
About this plugin
Static Suffix – Site Wide .html Extension allows you to append .html to the URLs of your WordPress pages, posts, custom post types, and taxonomies. This is useful for SEO purposes, migrations from legacy systems, or simply formatting your website URLs.
The plugin provides a simple, modern settings page where you can choose exactly which content types and taxonomies should have the .html extension.