Simple text
The quick brown fox jumps over the lazy dog.
Flesch: ~94 · Grade 2 · Very easy
Readability Checker
Estimate reading level with word, sentence, and syllable metrics—Flesch-style scores help you tune copy for your audience without guessing. Use Word Counter for raw counts or Word Frequency Counter to find repeated words.
Readability Checker
Paste text — metrics and scores update instantly.
Reading level scores are estimates based on formulas (e.g. Flesch-Kincaid) and do not replace professional editorial review.
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Reading time
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Reading level
Easy
Flesch 70+
Moderate
Flesch 50–69
Difficult
Flesch below 50
Paste or type text to analyze
Formula-based estimates
Readability metrics update as you type.
Flesch Reading Ease
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Paste text to analyze
Flesch-Kincaid Grade Level
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Estimated school grade
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Reading difficulty
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Recommendations
Paste text to see personalized recommendations.
Your text stays in your browser — nothing is uploaded.
Example
Blog paragraph
Short sentences help readers. Clear headings make posts easy to scan.
Flesch: ~78 · Easy · ~2 min read
Dense academic text
Sophisticated methodological frameworks necessitate comprehensive evaluation.
Flesch: ~12 · Grade 16+ · Very difficult
Reading Level Explained
Very Easy
Flesch 90–100. Best for broad audiences, quick instructions, and plain-language summaries.
Easy
Flesch 70–89. Suitable for blog posts, marketing copy, and general web content.
Standard
Flesch 50–69. Typical for news articles, business emails, and educated adult readers.
Difficult
Flesch 30–49. Common in technical docs, policy briefs, and specialist topics.
Very Difficult
Flesch 0–29. Often found in academic papers, legal text, and dense expert writing.
Readability Scale
Flesch Reading Ease ranges are formula-based estimates — useful guides, not strict grading rules.
| Difficulty | Flesch Score |
|---|---|
| Very Easy | 90–100 |
| Easy | 70–89 |
| Standard | 50–69 |
| Difficult | 30–49 |
| Very Difficult | 0–29 |
Reading Level by Audience
Blog posts
Target: Grade 6–8. Pair with Word Counter for length checks.
Marketing copy
Target: Grade 5–7. Short sentences and plain words convert better.
Emails
Target: Grade 5–8. Clean formatting with Remove Extra Spaces first.
Technical documentation
Target: Grade 8–12. Balance precision with scannable structure.
Academic writing
Target: Grade 12+. Higher complexity is expected for expert readers.
Children's content
Target: Grade 2–5. Very short sentences and simple vocabulary.
Common Uses
Blog posts
Check whether posts match your target reading level before publishing.
SEO articles
Balance keyword density with readable sentence structure.
Emails
Keep customer and team emails concise and easy to scan.
Academic papers
Gauge complexity and spot overly dense paragraphs.
AI-generated content
Screen ChatGPT drafts for wordy or repetitive phrasing.
Newsletters
Ensure subscribers can read issues quickly on mobile.
Product descriptions
Write clear catalog copy that converts without jargon.
Educational material
Align lesson text with student grade levels.
Before and After Examples
| Scenario | Before | After | Result |
|---|---|---|---|
| Long sentences | One 40-word sentence with multiple clauses. | Split into two 15-word sentences. | Flesch score improves |
| Simple rewrite | Utilize comprehensive methodologies. | Use clear methods. | Grade level drops |
| Blog article | Dense intro paragraph | Short intro + subheadings | Easier · higher Flesch |
| Email copy | Formal, wordy closing | Direct sign-off | Moderate → Easy |
| AI text | Repetitive long sentences | Edited, varied length | Difficulty decreases |
| Student essay | Complex vocabulary throughout | Plain-language revision | Grade estimate lowers |
Readability Problems This Tool Solves
- Sentences too long — high average words per sentence raises grade level.
- Complex wording — multi-syllable words lower Flesch Reading Ease. Try Word Frequency Counter to spot repetition.
- Low readability — identify when text exceeds your audience's comfort zone.
- AI-generated density — catch wordy ChatGPT-style phrasing early.
- Poor user engagement — hard-to-read copy increases bounce rates.
- Hard-to-scan paragraphs — long blocks without breaks hurt comprehension.
- Excessive jargon — technical terms inflate syllable counts.
- Academic complexity — verify essays and reports match intended readers.
Metrics Explained
Words
Total token count — the base for reading time and formula inputs.
Sentences
Segments ending in . ! ? — longer averages raise difficulty.
Paragraphs
Blocks separated by blank lines — helps assess structure.
Average words per sentence
Shorter averages usually mean easier reading.
Average characters per word
Proxy for word length and complexity.
Reading time
Estimated minutes at ~200 words per minute. Cross-check with Word Counter.
Reading level
Easy, Moderate, or Difficult based on Flesch Reading Ease tiers.
Flesch score
0–100 scale — higher means easier to read.
Grade level
Flesch-Kincaid estimate mapped to U.S. school grades.
Popular Workflows
Large Examples
Blog article
- Words
- 850
- Sentences
- 62
- Grade
- 7
- Difficulty
- Easy
Email
- Words
- 120
- Sentences
- 8
- Grade
- 5
- Difficulty
- Easy
AI output
- Words
- 400
- Sentences
- 18
- Grade
- 11
- Difficulty
- Difficult
Essay
- Words
- 1200
- Sentences
- 48
- Grade
- 14
- Difficulty
- Difficult
Research text
- Words
- 2000
- Sentences
- 72
- Grade
- 16
- Difficulty
- Very difficult
Product page
- Words
- 300
- Sentences
- 22
- Grade
- 8
- Difficulty
- Standard
Why Readability Matters
SEO
Readable content keeps visitors engaged and reduces bounce rates.
Writing
Clear prose reaches more readers without dumbing down ideas.
Education
Match materials to student reading levels and comprehension.
Marketing
Simple copy converts better than dense promotional text.
AI prompts
Evaluate generated drafts before publishing or sending.
Accessibility
Plain language helps readers with varying literacy levels.
Research
Compare abstract complexity across papers and notes.
Copywriting
Test headlines, CTAs, and product blurbs for clarity.
Readability vs Other Tools
| Task | Best Tool |
|---|---|
| Measure readability | Readability Checker |
| Count words | Word Counter |
| Analyze vocabulary | Word Frequency Counter |
| Compare revisions | Text Diff |
| Replace text | Find and Replace Text |
| Clean formatting | Plain Text Converter |
Frequently Asked Questions
Are readability scores exact?
No. They are statistical estimates based on sentence length and syllable patterns — real comprehension varies by audience and topic.
Does formatting affect scores?
Yes. HTML tags, extra whitespace, and line breaks can skew counts. Clean text first with Plain Text Converter or Remove Extra Spaces.
Why is my score low?
Long sentences, multi-syllable words, and technical jargon lower Flesch Reading Ease. Try shorter sentences and simpler vocabulary.
What is Flesch Reading Ease?
A 0–100 score where higher values mean easier reading. It uses average sentence length and syllables per word.
What is grade level?
The Flesch-Kincaid Grade Level estimates U.S. school grade needed to understand the text — e.g. Grade 8 means eighth-grade reading level.
What score should I target?
Blog and web copy often aim for Flesch 60–70 (Standard to Easy). Patient materials target lower; expert white papers may accept higher complexity.
What grade level is best for blog posts?
Most blog posts target Grade 6–8 (Flesch roughly 60–80). Use Text Diff to compare readability before and after edits.
What readability score is good for SEO?
SEO content often aims for Flesch 60–70 (Standard to Easy). Readable pages keep visitors engaged — pair with Word Frequency Counter for keyword balance.
How can I improve a difficult score?
Shorten sentences, replace jargon with plain words, and break up long paragraphs. Sentence Case Converter and Plain Text Converter help clean drafts before re-checking.
Can I analyze long articles?
Yes. Processing runs in your browser. Very large pasted texts may slow older devices — split huge documents if needed.
Can AI text score poorly?
Yes. AI outputs often use long sentences and formal vocabulary, which can lower Flesch scores even when grammar is correct.
Does punctuation affect results?
Punctuation defines sentence boundaries. Missing periods merge sentences; extra punctuation can split them — affecting averages.
Can short sentences improve scores?
Yes. Shorter sentences and simpler words typically raise Flesch Reading Ease and lower grade level estimates.
Is my text uploaded?
No. All analysis runs locally in your browser — your text never leaves your device.
Can I download results?
Yes. Use Copy Report or Download TXT to save all metrics and readability scores as plain text.