Check Readability - Readability & Grade Level Checker

Calculate Flesch-Kincaid, ARI, Gunning Fog, Coleman-Liau, SMOG & Dale-Chall readability scores for selected text or webpages.

Check Readability is a powerful, privacy-first Chrome Extension designed to help content creators, copywriters, SEO specialists, educators, and legal professionals analyze and optimize their text for maximum clarity. Instantly open the native Chrome Side Panel to check the readability of any selected text or full webpage using 9 industry-standard readability algorithms. ✨ KEY FEATURES: • Native Side Panel UI: Accessible directly alongside any active tab without blocking your workspace. • 9 Industry-Standard Formulas: - Flesch Reading Ease - Flesch-Kincaid Grade Level - Automated Readability Index (ARI) - Gunning Fog Index - Coleman-Liau Index - SMOG Index - Linsear Write - FORCAST Readability - New Dale-Chall Formula • Real-time Consensus Dashboard: Instantly see overall average grade levels, difficulty ratings, and recommended target age ranges. • Live Text Extraction: Select any text on a webpage or extract full page body text with one click. • Live Math Equations & Interactive Popovers: Hover over any formula card to inspect live equation breakdowns, syllable counts, and character metrics. • Dark & Light Theme Support: Clean, modern interface supporting System, Light, and Dark modes. • 100% Private & Local: All syllable parsing and mathematical scoring run locally in your browser. Zero tracking, zero data collected. Free online web tools available at https://checkreadability.com