Content Readability Checker
Check Flesch reading ease score and content readability
About Readability Scoring
This tool uses the Flesch Reading Ease formula, which considers sentence length and syllable count. Higher scores (60-100) indicate easier reading, while lower scores (0-50) suggest more complex content.
90-100: Very Easy (5th grade)
80-89: Easy (8th grade)
70-79: Fairly Easy (9th grade)
60-69: Standard (10th-12th grade)
50-59: Fairly Difficult
30-49: Difficult (College level)
0-29: Very Difficult (Professional)
What is Content Readability Checker?
The Content Readability Checker is a free online tool that measures how easy your writing is to read using seven established readability formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level, the Gunning Fog Index, the SMOG Index, the Coleman-Liau Index, the Automated Readability Index (ARI), and an approximate Dale-Chall score. The Flesch Reading Ease score runs from 0 to 100 (60-100 is clear, 0-50 is dense), and the other six each estimate a US school grade level. The tool averages the grade-level formulas into a single consensus reading level with a plain-language interpretation, so you know at a glance who can comfortably read your text. Paste any article, email, or web page and it instantly reports every score plus supporting statistics: word, sentence, and syllable counts, polysyllabic (complex) words, average syllables per word, and average words per sentence. Everything runs in your browser, so your content stays private and there is no signup.
How to use Content Readability Checker?
Checking the readability of your content takes only a moment:
- 1 Paste your article, email, or web copy into the content box. The tool reads best with at least three full sentences so the formulas can measure sentence structure accurately.
- 2 Click Check Readability. The tool counts words, sentences, syllables, and complex words behind the scenes, then applies all seven formulas.
- 3 Review the Flesch Reading Ease score, the consensus grade level with its plain-language interpretation, and the full All Readability Formulas breakdown so you can compare how each formula rates your text.
- 4 Check the supporting statistics to see exactly what is driving the scores.
- 5 Read the Improvement Suggestions. They tell you whether to shorten long sentences, swap complex words for simpler ones, or add more content, so you can rewrite for your target audience.
Why use this tool?
Readable content keeps people on the page, improves comprehension, and converts better. Most general audiences read comfortably around a Flesch score of 60-70, roughly an eighth-grade level, yet writers often drift into long sentences and jargon without noticing. Relying on a single formula can be misleading, because each one weighs sentence length and word difficulty differently — that is why this tool reports seven formulas and a consensus grade. When they all point to a similar grade you can trust the result; when they disagree, the spread tells you whether long sentences or hard vocabulary is the real problem. A readability score turns a vague feeling that text is hard into concrete numbers you can act on. Because the analysis happens locally in your browser, your draft is never uploaded and the scores appear instantly, making it easy to test edits before you publish.
Examples
An article scores 42 on Flesch Reading Ease with an average sentence of 28 words and a consensus grade of 13 (college level). After splitting long sentences, Flesch climbs to 65 and the consensus grade drops to 8 — comfortable for a general audience.
A promotional email full of complex words scores poorly across Gunning Fog and SMOG. Swapping in simpler alternatives lifts the Flesch score into the easy range and lowers every grade-level formula at once.
A technical whitepaper aimed at engineers shows a consensus grade around 14 and a Coleman-Liau Index near 13. The agreement across formulas confirms the tone fits a professional audience rather than the general public.
Frequently Asked Questions
Which readability formulas does this tool calculate?
Seven: Flesch Reading Ease, Flesch-Kincaid Grade Level, the Gunning Fog Index, the SMOG Index, the Coleman-Liau Index, the Automated Readability Index (ARI), and an approximate Dale-Chall score. It also averages the grade-level formulas into a single consensus reading level.
What is the Flesch Reading Ease score?
It is a formula that rates text from 0 to 100 based on average sentence length and average syllables per word. Higher numbers mean easier reading; 60-70 is comfortable for most general audiences.
Why do the formulas sometimes give different grade levels?
Each weighs sentence length and word difficulty differently: SMOG and Gunning Fog focus on complex words, Coleman-Liau and ARI use character counts, and Dale-Chall checks difficult vocabulary. The consensus grade averages them into one reliable figure.
What score should I aim for?
For general audiences aim for a Flesch score of 60-70 and a consensus grade around 7-9. Marketing and consumer content benefits from higher Flesch scores, while technical or professional writing naturally scores lower and that is acceptable for its readers.
Is my content sent to a server?
No. The entire analysis runs inside your browser, so your draft is never uploaded or stored. Your content stays completely private and the tool is free with no signup.
How can I improve my readability scores?
Break long sentences into shorter ones, replace polysyllabic words with simpler alternatives, and prefer active, direct phrasing. Re-running the check after edits shows the consensus grade and Flesch score improving in real time.
Related Tools
Explore more free tools you might find useful