AEO & clarity checklist
Free readability & AEO clarity checker
Clear writing wins twice: real readers stay on the page, and AI assistants can quote you with confidence. This free tool — built by a Singapore content & SEO agency — scores your text on the Flesch Reading Ease scale, estimates the US grade level, and breaks down sentence length, complex-word share and reading time. It then runs an answer-engine-optimisation (AEO) checklist that flags exactly what to simplify so your content is more likely to be cited by ChatGPT, Perplexity and Google’s AI Overviews. Everything runs in your browser — your text is never uploaded.
How the Flesch Reading Ease score works
The score runs from 0 to 100 — the higher, the easier to read. It’s calculated from two things: average sentence length and average syllables per word. Score 60–70 is plain English readable by most adults; 30–50 is difficult, university-level prose; below 30 is very hard, dense academic or legal writing. For web content aimed at a broad audience, a score of 60+ (roughly grade 7–9) is the sweet spot — clear without being simplistic.
Why readability drives AI citations
Large language models favour content they can lift cleanly. A short, self-contained sentence that answers a question directly is far easier for an AI to quote — and attribute — than the same idea buried in a 40-word sentence stuffed with clauses and jargon. That’s the core of answer engine optimisation: write the answer first, keep sentences tight, define terms plainly, and structure content with clear headings and lists. High readability isn’t “dumbing down” — it’s making your expertise easy to extract, which is precisely what gets you cited.
Quick ways to improve your score
Split any sentence over ~25 words into two. Lead each section with a direct, one-sentence answer before you elaborate. Swap long Latinate words for short Anglo-Saxon ones (“use” not “utilise”, “help” not “facilitate”). Cut filler (“in order to” → “to”). Use active voice. Break walls of text into short paragraphs, bullet lists and tables. Re-run the checker after editing and watch the score climb — then pair it with our schema markup generator to add the structured data that helps machines understand your page.
Readability is a proxy, not the goal
A high Flesch score is a signal that your sentences are easy to parse, but it can be gamed in ways that make writing worse. Chopping every sentence into five words lifts the score while stripping out the connective logic that makes an argument follow — and both human readers and AI answer engines rely on that logic to understand what you actually mean. Treat the number as a smoke alarm: a low score reliably flags a problem, but a high score doesn’t prove the content is clear, complete or worth citing.
The more valuable reading of your score is relative. Compare a draft against the pages already ranking and being cited for your topic; matching their reading level is usually smarter than chasing an arbitrary target. A technical B2B audience tolerates denser prose than a consumer one, so calibrate to who is actually reading.
Structuring content so answer engines can lift it
AEO clarity is as much about structure as sentence length. Answer engines extract self-contained passages, so the most citable paragraphs state their claim in the first sentence and then support it — the inverted-pyramid style journalists use. Front-load the answer, define any term before you lean on it, and avoid pronouns that only resolve three paragraphs earlier; a passage that can’t stand alone rarely gets quoted.
Formatting reinforces this. A question phrased as a heading followed immediately by a tight, standalone answer gives an engine a clean unit to lift, and consistent, specific terminology helps it match your page to a query. If you want this built into your content systematically, our AEO agency in Singapore engineers pages for answer-engine visibility, and our word counter helps keep those passages tight.
Frequently asked questions
What is a good readability score for web content?
Aim for a Flesch Reading Ease of 60 or higher, which corresponds to roughly a US grade 7–9 reading level. That’s clear enough for a broad audience while still allowing nuance. Highly technical B2B content can sit a little lower, but going below 30 risks losing readers and making it harder for AI to quote you.
Does readability affect SEO rankings?
Not as a direct ranking factor, but clearer content improves engagement signals — time on page, scroll depth, lower bounce — and makes your pages easier to feature in rich results and AI Overviews. In practice, readable content tends to rank and convert better.
How is the grade level calculated?
It uses the Flesch–Kincaid Grade Level formula, which combines average sentence length and syllables per word to estimate the US school grade needed to understand the text. A grade of 8 means a typical 13–14-year-old could read it comfortably.
Is my pasted text private?
Yes. All analysis happens locally in your browser with JavaScript — nothing you paste is sent to a server or stored anywhere.
Does a higher Flesch score always mean better content?
No. Beyond a point, raising the score means shortening sentences so aggressively that logic and nuance are lost. Aim for clear rather than simplistic, and match the reading level your audience and your ranking competitors already expect.
Can readability alone get my content cited by AI?
Readability is necessary but not sufficient. Answer engines also weigh accuracy, structure, topical authority and how self-contained each passage is. A clear but shallow page won’t out-cite a clear, thorough one that directly answers the query.
