ReadabilityReport is a web application that analyzes text readability using four major formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, and SMOG Index. It provides sentence-level highlighting, paragraph breakdowns, and PDF reports to help writers optimize their content.
How to Use
Basic Usage
Paste your text into the textarea (up to 5,000 characters).
Click "Analyze Readability".
View scores, highlights, and suggestions.
Switch to "By Paragraph" for detailed breakdown.
Export a PDF report (free tier includes watermark).
File Uploads
Upload .txt, .docx, or .pdf files. The app extracts text and analyzes it automatically.
Understanding the Scores
Flesch Reading Ease
0-100 scale. Higher = easier to read.
90-100: Very Easy (5th grade)
60-70: Standard (8th-9th grade)
0-30: Very Difficult (college graduate)
Grade Level Formulas
Estimated school grade level required to understand the text.
0-6: Elementary
7-12: Middle/High School
13+: College/Professional
Audience Labels
Based on average grade:
Elementary: Grades 1-6
Middle School: Grades 7-9
High School: Grades 10-12
College: Grades 13-16
Graduate: 17+
Sentence Highlighting
Text is highlighted based on difficulty:
Green: Easy sentences
Yellow: Hard sentences (4+ grade levels above average)
Red: Very hard sentences (6+ grade levels above average)
Paragraph Breakdown
Each paragraph gets its own analysis:
Individual grade level
Status: ✓ Good or ⚠️ Needs work
Tips for improvement
Complex words list
Longest sentence
PDF Export
Generates a multi-page report including:
Cover page with recommendations
Paragraph breakdown
Highlighted text
Full text
Free tier includes watermark. Pro tier offers clean exports.