Alex

Simple on-page SEO Checker, based on on React, Redux and Chai
You can use custom tests, more information here: <a href="https://github.com/seo-checker/seo-cheker" rel="nofollow ugc">SEO checker</a>

Luway SEO Checker

Dirigible Studio

Tired of bloated SEO plugins?
Us too. That’s why we built Dirigible SEO. We’re search engine optimization experts who use professional keyword research and tracking tools to optimize and refine our content outside of WordPress. 
We don’t need a complex plugin to help us accomplish our SEO goals—we simply needed a way to edit our title tags and meta descriptions within a WordPress page or post.
Dirigible SEO uses the power of <a href="https://www.advancedcustomfields.com" rel="nofollow ugc">Advanced Custom Fields</a> to set up everything you need to manage your SEO.
See it in action https://www.youtube.com/watch?v=Dd7ZeIrZMC0&feature=youtu.be

Dirigible SEO

Free, fast and easy search engine optimization for web developers & SEO pros. Edit titles and meta tags quickly and easily. All killer, no filler.

Luway SEO Checker vs Dirigible SEO