Readability & Grammar Scorer
Score text readability using Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog index.
Linguistic & Readability Index Breakdown
| Index / Linguistic Metric | Score | Target Benchmark & Meaning |
|---|
Detected Passive Voice Instances
✍ The 60-70 Flesch Reading Score Rule
Leading web publishers and corporate communicators aim for a Flesch Reading Ease score between 60 and 70 (Grade 7 to 8 reading level). Writing at this level does not mean dumbing down ideas—it ensures that busy readers, mobile users, and non-native English speakers can absorb your message rapidly without fatigue.
About this tool
How to use it
- Paste your text into the editor box or click any of the sample presets.
- Inspect the real-time Flesch Reading Ease score and equivalent US school grade level.
- Review the passive voice scanner for highlighted weak constructions.
- Check average sentence length and the percentage of complex (> 2 syllable) words to improve clarity.
Why it matters
Clear writing drives higher conversion rates and improves comprehension. Dense sentences packed with passive verbs and multi-syllable jargon alienate readers and reduce engagement. Checking your text with mathematical readability formulas provides actionable benchmarks for plain English.
When to use it
Use this tool when drafting marketing emails, editing university essays, preparing executive summaries, writing blog posts, or auditing documentation.
Good to know
Calculates standard linguistic metrics including Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog index with heuristic syllable counting. Runs 100% locally in your browser.
Common questions
What is a good Flesch Reading Ease score?
A score between 60 and 70 is ideal for general web content, corresponding to an 8th-grade reading level easily understood by the broad public.
Why should I minimize passive voice?
Passive voice (e.g. 'The report was written by Alex') obscures the subject and weakens your prose. Active voice (e.g. 'Alex wrote the report') is more direct, engaging, and concise.
How does the Flesch-Kincaid Grade Level work?
It translates sentence length and syllable count into the equivalent United States educational school grade required for easy comprehension (e.g. Grade 8 = roughly 13-14 years old).
Is my text kept private?
Yes. All text analysis executes strictly in your local browser JavaScript memory. No words or sentences are ever saved or transmitted.