Online Readability Checker
Analyze your text with 6 industry‑standard formulas. Get instant Flesch, Gunning Fog, SMOG, Coleman‑Liau & ARI scores — no signup, 100% private.
Your text never leaves your browser. All readability calculations happen locally. No signup, no tracking, no data storage.
Why Readability Matters for Your Content
Readability scores help you understand how easy your writing is to read and comprehend. An online readability checker like this one evaluates key factors like sentence length, word complexity, and syllable count. Whether you're writing blog posts, email newsletters, product descriptions, or academic papers, checking readability ensures your message reaches the broadest possible audience.
Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau & ARI.
Word count, sentence count, character count, syllables, and more.
Get specific tips to lower your grade level and improve clarity.
All calculations run locally in your browser — no data leaves your device.
Use the tool instantly. No registration, no email, no limits.
Search engines favor clear, easy-to-read content. Higher readability can improve engagement.
How to Use This Free Readability Checker
1. Paste or type your text into the input area.
2. Click "Analyze Readability" — your content never leaves your browser.
3. Review the six readability scores instantly displayed.
4. Check the text statistics (words, sentences, syllables) below the input box.
5. Follow the advice box to simplify complex sentences and improve your writing.
Understanding the Readability Formulas
- Flesch Reading Ease — Scores from 0–100. Higher = easier. Aim for 60+ for general web content.
- Flesch-Kincaid Grade Level — U.S. school grade level needed to understand the text. Target grade 8 or below.
- Gunning Fog Index — Years of formal education required. Below 12 is standard for business writing.
- SMOG Index — Simple Measure of Gobbledygook. Great for health or technical content.
- Coleman-Liau Index — Uses character count instead of syllables. Reliable for digital content.
- Automated Readability Index (ARI) — Character and word-based formula, useful for quick grade estimation.
What Is a Good Readability Score?
For most blog posts, emails, and general web writing, aim for a Flesch Reading Ease score above 60 and a Flesch-Kincaid grade below 9. This means your content is accessible to 13–15 year old students, which covers the majority of adults. Lower scores (harder to read) may be appropriate for technical, academic, or legal audiences, but always consider your target reader.
Frequently Asked Questions
Learn how to use this tool correctly by reading our step-by-step tutorial.
