Readability Checker Online
Check text readability using Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG Index. Optimize for Google and readers.
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About Readability Score Checker
Analyse text readability with 5 industry-standard metrics: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, Coleman-Liau Index, and SMOG Index. Get grade-level recommendations and specific improvement tips.
Readability scores estimate how difficult a piece of text is to understand based on measurable factors like sentence length and syllable count per word, using established formulas like Flesch Reading Ease (higher score = easier to read) and Flesch-Kincaid Grade Level (which estimates the US school grade level needed to comprehend the text). These metrics are widely used by content writers, technical documentation teams, and UX writers to check whether copy matches its intended audience — a legal disclaimer scoring at a postgraduate reading level might be appropriate, but marketing copy scoring the same way is likely to lose most readers. This tool computes 5 industry-standard readability metrics simultaneously so you can see how a piece of text scores across multiple established formulas rather than just one.
How to use
- Type or paste your text into the input box — the transformed output appears instantly below.
- Adjust any available options (style, format, or mode) to fine-tune the result to what you need.
- Copy the result directly, or share it via WhatsApp or Twitter using the buttons above.
- Try a related text tool below if you need a second transformation on the same content.
- All text processing happens locally in your browser — your content is never sent anywhere.
Tool details
⚡ Next step — complete your workflow
Expert note — India 2026
For SEO content in India, Flesch Reading Ease score of 60-70 is optimal — "Plain English" that 13-15 year olds can read. Google's quality guidelines emphasize content written for readers, not algorithms.
Frequently asked questions
What is a good Flesch Reading Ease score?
90-100 = Very Easy (5th grade). 70-80 = Fairly Easy (7th grade). 60-70 = Standard (8th-9th grade — ideal for web content). Below 30 = Academic/Legal.
Does readability affect Google rankings?
Indirectly yes. Google measures dwell time and bounce rate — hard-to-read content loses readers faster. Better readability = longer session = positive SEO signal.
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