Pro Readability Score Checker
Multi-metric readability analysis with highlights and improvement tips.
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Summary & Scores
Review basic counts, readability indexes, and how your text aligns with the selected audience.
Readability Scores
Highlighted Preview
Long sentences and complex words are highlighted. Hover to see why.
Run an analysis to see a highlighted version of your text here. Long sentences and complex words will be emphasised.
Suggestions
Readability History
Saved summaries stored locally in this browser only.
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Readability Score Checker – Online Readability Checker
Readability Score Checker is a browser-based readability checker that helps writers, content marketers, SEO specialists and editors understand how easy their text is to read. By combining classic readability formulas with practical highlights and suggestions, it turns raw copy into actionable insights. All analysis happens client‑side in your browser, so draft articles, landing pages and documentation are never sent to external servers by this tool.
Analyze Readability with Multiple Classic Formulas
The checker calculates several industry-standard readability scores at once, including Flesch Reading Ease, Flesch‑Kincaid Grade Level, Gunning Fog Index and the SMOG index. These metrics estimate the education level a reader needs to understand your content by looking at sentence length, syllables per word and the proportion of complex words. A single dashboard shows word and sentence counts, average words per sentence, approximate syllables per word and an estimated reading time, giving you a full picture of text complexity.
You can tailor the analysis to your audience by setting a target level such as “general public”, “experts” or “children”. The tool then flags when your draft is significantly above or below that target, helping you choose whether to simplify explanations or add more depth and nuance.
Highlight Long Sentences and Complex Words Instantly
Beyond numeric scores, Readability Score Checker offers a highlighted preview that draws attention to long sentences and unusually long words. Thresholds for sentence length and word length are fully configurable, so you can adapt the tool for technical documentation, blog posts or educational material. Hovering over highlighted segments reveals short explanations, making it easier to decide where to split, shorten or rephrase without losing meaning.
A built‑in history feature stores compact readability summaries locally in your browser for future reference. One‑click copy and export options create clean summaries or plain‑text reports, which can be shared with clients, editors or team members. Used regularly, this online readability checker helps refine sentence rhythm, vocabulary choices and structure so that your content is easier to understand, more engaging and better aligned with SEO and conversion goals.
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