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Analyze webpage readability using five standard formulas and CEFR level mapping Instantly analyze the reading difficulty of any webpage, article, or document with LexiCheck - a powerful browser extension that uses five industry-standard readability formulas to give you comprehensive text analysis.KEY FEATURES:📊 Multiple Readability Formulas Flesch Reading Ease (0-100 scale) Flesch-Kincaid Grade Level Gunning Fog Index SMOG Index Coleman-Liau Index 🎯 CEFR Level Mapping Automatically maps text to CEFR levels (A1-C2) to help language learners, educators, and content creators understand text complexity at a glance.📝 Comprehensive Text Metrics Word count, sentence count, syllable count Complex word percentage Average words per sentence Average syllables per word Detailed diagnostic information ✨ Flexible Analysis Options Analyze entire web pages Analyze selected text only Paste custom text for instant analysis Right-click context menu for quick checks Visual highlighting of difficult sentences and words 🎨 Smart Highlighting Visually identify challenging content with color-coded highlights: Difficult sentences (20+ words or high complexity) Complex words (3+ syllables) Clear visual feedback for content optimization 📚 Perfect For: Educators & Teachers: Assess reading materials for grade-level appropriateness Content Writers: Optimize articles for target audiences UX Writers: Ensure clarity in product copy and documentation ESL/Language Learners: Find content matching your proficiency level Accessibility Professionals: Improve content readability for diverse audiences Students: Evaluate source material complexity Publishers & Editors: Maintain consistent reading levels across content HOW IT WORKS: One-Click Analysis: Click the extension icon and choose "Analyze Page" to scan the current webpage Selection Mode: Highlight specific text and analyze just that portion Custom Text: Paste any text into the built-in editor for instant analysis Visual Feedback: Use the highlight feature to see difficult content marked directly on the page TECHNICAL DETAILS:LexiCheck uses proven readability formulas trusted by educators and publishers: Flesch Reading Ease: Scores text on a 0-100 scale (higher = easier to read) Flesch-Kincaid Grade: Indicates US school grade level required to understand text Gunning Fog Index: Estimates years of formal education needed SMOG Index: Particularly accurate for health/medical content Coleman-Liau: Uses character count for precise measurement All formulas include sophisticated syllable counting algorithms with 95%+ accuracy for common English words, special handling for abbreviations, proper nouns, and edge cases.CEFR LEVEL GUIDE: A1: Very simple text (≤ Grade 3) A2: Basic everyday text (Grades 4-5) B1: Moderate complexity (Grades 6-8) B2: Upper-intermediate (Grades 9-11) C1: Advanced academic (Grades 12-14) C2: Proficient/native level (Grade 15+) ADVANCED FEATURES:✅ Automatic detection of structured text (worksheets, tests, lists) ✅ Smart sentence segmentation with abbreviation protection ✅ Performance optimization for large documents ✅ Works on most websites (see limitations below) ✅ Clean, intuitive interface with no clutter ✅ Privacy-focused: all analysis happens locally in your browserKNOWN LIMITATIONS: Google Docs: Due to security restrictions, use "Analyze Selection" or copy-paste into Custom Text PDFs: Cannot extract text from embedded PDFs Canvas/image-based content: Only works with actual text Cross-origin iframes: Some content may be inaccessible due to browser security PRIVACY & SECURITY:Your privacy matters. LexiCheck: Processes all text locally in your browser Never sends your content to external servers Doesn't collect or store personal data Open to transparency about how it works USE CASES: For Writers: "I use LexiCheck to ensure my blog posts stay at a Grade 8 reading level for maximum accessibility. The visual highlighting helps me spot overly complex sentences instantly." For Teachers: "Perfect for finding age-appropriate articles for my students. I can quickly scan websites and see if they match my class's reading level." For Language Learners: "As a B1 English learner, this helps me find articles that challenge me without overwhelming me. The CEFR mapping is incredibly useful." For Content Teams: "Our style guide requires Grade 9 readability. LexiCheck helps our team maintain consistency across all our documentation." GETTING STARTED: Install the extension Navigate to any webpage Click the LexiCheck icon in your toolbar Choose your analysis method: "Analyze Page" for full page analysis "Analyze Selection" for highlighted text "Custom Text" to paste your own content View instant results with detailed metrics TIPS FOR BEST RESULTS: For most accurate results, analyze text samples of 100+ words Use "Analyze Selection" for specific sections The Custom Text feature works great for drafts and documents Highlighting works best on pages under 10,000 words for performance Right-click selected text for quick context menu analysis SUPPORT & FEEDBACK: We're committed to improving LexiCheck. If you encounter issues or have suggestions, please use the feedback options in the extension or leave a review. We read every comment and actively work on updates. FREQUENTLY ASKED QUESTIONS: Q: Is this accurate? A: LexiCheck uses industry-standard formulas with 95%+ syllable counting accuracy. Results are comparable to professional readability tools. Q: Does it work offline? A: Yes! All analysis happens in your browser. No internet connection needed after installation. Q: Can I analyze my own documents? A: Yes! Use the Custom Text feature to paste any content for instant analysis. Q: Why can't it read Google Docs? A: Google Docs uses security features that block extensions from accessing document content directly. Use "Analyze Selection" or copy-paste instead. Q: Is my data safe? A: Absolutely. Nothing leaves your browser. All processing is 100% local. WHAT'S NEXT: We're actively developing new features: Export detailed reports Save and compare analyses Batch processing for multiple pages Integration with popular writing tools Additional readability formulas Download LexiCheck today and take the guesswork out of readability analysis!