How to Use Readability Checker
Three steps to use Readability Checker.
- Paste Your Text
Copy and paste the text you want to analyze. Supports up to 10,000 characters.
- Automatic Analysis
Readability scores are calculated automatically: Flesch-Kincaid, Gunning Fog, SMOG, and Coleman-Liau.
- Review Statistics
View grade level, reading time, sentence/word/syllable counts, averages, and more.
❓ FAQ
What is text readability?
Text readability measures how easy a piece of text is to read and understand. Readability checkers use mathematical formulas (like Flesch-Kincaid, Gunning Fog) that analyze sentence length, syllable count, and word complexity to quantify reading difficulty.
What does the Flesch-Kincaid score mean?
Flesch-Kincaid has two metrics: Reading Ease (0-100, higher = easier) and Grade Level (corresponding to US education grades). 60-70 = 8th-9th grade (fairly easy), 30-50 = college level (difficult). Most web content targets 60-70.
What readability level should my content be?
General guidelines: web content should target 8th-9th grade (60-70 score), children's content at 5th-6th grade, academic/technical at 12th-16th grade. For general audiences, keep sentences under 15-20 words.
Does readability affect SEO?
Yes. Search engines prefer readable content. Google's algorithm considers readability, and easier-to-read content often ranks better. AI search engines (ChatGPT, Perplexity) also favor clear, readable content for citations.
Does this tool support Chinese readability?
This tool is primarily designed for English text analysis since existing readability formulas (Flesch-Kincaid, Gunning Fog, etc.) are based on English grammar and syllable structures. Basic statistics like character and paragraph counts are provided for Chinese text.
What is the Gunning Fog Index?
Gunning Fog Index measures text complexity. Formula: 0.4 × (average sentence length + percentage of complex words). The result corresponds to education grade level. 12+ means college-level difficulty. Target range is typically 8-12 for broad accessibility.