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Content Readability Checker

📁Writing
💳FREE
🔄Updated March 2026

Check the readability of your content with Flesch-Kincaid, Gunning Fog, and SMOG scores.

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What Is the Content Readability Checker?

The Content Readability Checker analyzes your text and scores it using established readability formulas including Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, and Coleman-Liau Index. Paste any content and instantly see what grade level a reader needs to understand it, along with specific suggestions for improving clarity.

Readability directly impacts engagement. Content written at a 12th-grade level loses most of its audience, while the same message at an 8th-grade level reaches a much wider readership. Major publications like The Wall Street Journal write at a 9th-grade level, and popular blogs aim for 6th-8th grade. If your content scores higher than your target audience can comfortably read, you are losing readers before they finish the first paragraph.

The tool highlights long sentences, complex words, passive voice usage, and adverb density, giving you actionable targets for improvement. Content marketers, copywriters, UX writers, technical documentation teams, and anyone who writes for a public audience will find this tool valuable for quality control.

Check your content's readability now and make your writing clearer.

Key Features

Multiple Readability Scores
Get Flesch-Kincaid, Gunning Fog, SMOG, and Coleman-Liau scores simultaneously for a comprehensive readability picture.
Sentence-Level Analysis
Long and complex sentences are highlighted individually so you know exactly which parts of your text need simplification.
Word Complexity Flags
Multi-syllable words and jargon are flagged with simpler alternatives suggested where possible.
Passive Voice Detection
Passive constructions are identified and active voice rewrites are suggested to make your writing more direct and engaging.
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How to Use Content Readability Checker

Paste Your Content
Open the Readability Checker and paste the text you want to analyze. It works with blog posts, emails, product copy, or any written content.
Review Scores
Examine your readability scores across all formulas. For general audiences, aim for a Flesch-Kincaid grade level of 6-8.
Fix Highlighted Issues
Work through flagged sentences, complex words, and passive voice instances. Simplify language and shorten sentences where possible.
Re-Check
Paste your revised text and re-run the analysis to confirm your improvements moved the scores in the right direction.

Frequently Asked Questions

What readability score should I target?
For general web content and blogs, aim for a Flesch-Kincaid grade level of 6-8. Technical documentation can be 10-12. Academic writing is typically 12+. The right target depends on your audience.
Does lower readability mean dumbed-down writing?
No. Low readability scores mean your ideas are expressed clearly and efficiently. Hemingway wrote at a 4th-grade reading level. Simplicity is a skill, not a limitation.
Can I check content in languages other than English?
The readability formulas are calibrated for English text. Applying them to other languages will produce unreliable scores. We recommend language-specific readability tools for non-English content.
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