Text Complexity Estimator
Score how hard a passage is to read — structure, vocabulary, and overall load — not just average sentence length.
Text Input & Settings
Enter your text and configure analysis settings. For comprehensive analysis, use at least 200-300 words.
Analysis Configuration
Try sample texts:
Ready to Analyze
Paste your text above and configure settings to get comprehensive complexity analysis across syntactic, lexical, semantic, discourse, and cognitive dimensions. Use at least 200-300 words for reliable results.
Complexity vs readability
Classic readability formulas lean on word and sentence length. Complexity scoring also looks at denser syntax, rarer vocabulary, and how ideas are stacked. Use it to see why a draft feels heavy, then cut or clarify the parts that matter.
- Syntax — nested clauses, long sentences
- Lexicon — uncommon or technical words
- Discourse — how sections connect and build
How to use the scores
- Paste at least a few hundred words when you can; short snippets swing wildly
- Compare against your audience, not a universal "good" number
- High complexity is fine for specialists; it's a problem when the audience isn't
- Revise the dimension that's high: shorten sentences, swap jargon, or reorganize
Frequently Asked Questions
How is this different from readability?
Readability is mostly length-based. Complexity also weighs structure and word choice, so you get a clearer picture of what to fix.
Which dimension matters most?
Depends on the text. Docs often struggle with vocabulary; stories with structure. Fix whatever is out of line for your readers.
How much text do I need?
A couple hundred words is a better sample than a single paragraph.
Is higher always worse?
No. Match the audience. Complex ideas sometimes need complex wording; the problem is mismatch.
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