CEFR Reader

About

🎯 CEFR Reader - Your Intelligent English Reading Companion
CEFR Reader is a powerful Chrome extension that analyzes the vocabulary difficulty of English web pages using internationally recognized standards. Whether you're learning English, preparing for exams, or selecting teaching materials, CEFR Reader helps you find content that matches your reading level.
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✨ KEY FEATURES
📊 Comprehensive Reading Analysis
• Instant vocabulary analysis for any English webpage
• 7-level CEFR classification (A1, A2, B1, B2, C1, C2, Unknown)
• Color-coded highlighting for easy visual identification
• Detailed statistics with pie charts and bar graphs
• Word count breakdown by difficulty level
📈 Professional Scoring Systems
• CEFR Level: European standard A1-C2 classification
• Lexile Measure: International reading difficulty index (200L-1700L)
• Flesch Reading Ease: 0-100 readability score
• Flesch-Kincaid Grade: US school grade equivalent (1-16+)
• Average sentence length and syllable count
🌍 Multi-Language Interface (12 Languages)
English, 简体中文 (Simplified Chinese), 繁體中文 (Traditional Chinese), 
日本語 (Japanese), 한국어 (Korean), Français (French), 
Español (Spanish), Português (Portuguese), Deutsch (German), 
Italiano (Italian), Русский (Russian), ไทย (Thai)
💡 Interactive Features
• Click any highlighted word to see definition
• Built-in dictionary with English explanations
• Audio pronunciation (uses Free Dictionary API)
• Syllable count and CEFR level for each word
• Floating ball for quick access to statistics
• Auto-analyze option for English pages
🎨 Customizable Experience
• Customize highlighting colors for each CEFR level
• Choose your preferred interface language
• Enable/disable auto-analysis
• Privacy-first: all processing done locally
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📚 USE CASES
For English Learners:
• Find articles matching your current level
• Gradually progress from A1 to C2
• Build vocabulary systematically
• Prepare for IELTS, TOEFL, TOEIC, CET exams
For Teachers:
• Quickly assess text difficulty
• Select appropriate reading materials
• Create level-graded assignments
• Monitor student progress
For Researchers:
• Analyze text complexity
• Compare reading levels across sources
• Study vocabulary distribution
For Content Creators:
• Ensure content matches target audience level
• Write for specific proficiency levels
• Improve content accessibility
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🔢 HOW IT WORKS
1. Vocabulary Analysis
   • Scans webpage content for English words
   • Matches against 18,000+ word CEFR database
   • Identifies word level (A1-C2) or marks as Unknown
   • Handles word variations (plurals, verb forms)
2. Readability Scoring
   • Analyzes sentence structure and length
   • Counts syllables per word
   • Applies Flesch-Kincaid algorithm
   • Calculates Lexile measure
   • Determines overall CEFR level
3. Visual Display
   • Highlights words in color-coded format
   • Shows real-time statistics popup
   • Displays comprehensive analysis panel
   • Updates floating ball with Lexile score
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🛡️ PRIVACY & SECURITY
• 100% Local Processing: All analysis happens in your browser
• No Data Collection: We don't collect or transmit any personal data
• No Tracking: No cookies, analytics, or user behavior tracking
• Minimal Permissions: Only requests essential permissions
• Open Source: Full source code available on GitHub
Permissions Used:
• activeTab: To analyze current webpage content
• storage: To save your color preferences and settings
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🚀 GETTING STARTED
1. Install the extension from Chrome Web Store
2. Navigate to any English webpage
3. Click the CEFR Reader icon or floating ball
4. View instant vocabulary analysis
5. Click highlighted words for definitions
6. Customize colors in Settings (optional)
Pro Tips:
• Use auto-analyze for seamless experience
• Click words to learn definitions
• Check the floating ball for quick stats
• Compare different websites' difficulty levels
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❓ FREQUENTLY ASKED QUESTIONS
Q: Does it work on all websites?
A: Yes, it works on any webpage with English content.
Q: Is my data safe?
A: Absolutely. All processing is done locally in your browser.
Q: Does it support other languages?
A: The interface supports 12 languages, but analysis is for English text only.
Q: Can I customize the colors?
A: Yes! Go to Settings to change colors for each CEFR level.
Q: How accurate is the analysis?
A: Uses established CEFR standards and academic readability formulas.
Q: Is it free?
A: Yes, completely free and open source.
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🔖 TAGS
#CEFR #VocabularyAnalyzer #ReadingLevel #EnglishLearning #ESL #IELTS #TOEFL #Lexile #FleschKincaid #LanguageLearning #Education #ChromeExtension