Check How Readable Your Writing Is in 200 Milliseconds

A Flesch Reading Ease score of 60-70 is "plain English" and ideal for general audiences (blog posts, marketing content). 30-50 is "fairly difficult" and suits academic or business writing. Above 80 is "easy" and works for children's content. AI-generated text typically scores below 50 — meaning it reads as too dense for most audiences.

Flesch-Kincaid Grade Level estimates the US school grade required to understand a text. Grade 8 is suitable for general adult audiences. Grade 12+ is academic. Grade 16+ is graduate-level. Most newspapers target grade 8-10. AI text often scores grade 12-16 because of its dense, polished sentence structure.

Yes. The Readability Checker runs entirely in your browser — your text never leaves your device. No account, no credit card, no email required. Unlimited use.

TextSight's Readability Checker shows seven different readability metrics — Hemingway shows one, Grammarly shows two. Plus, our tool ties into TextSight's Humanization Score, so you can see if your text reads as human or AI.

Unlimited. Since the tool runs entirely in your browser, you can paste an entire book or just a sentence. Calculation typically completes in under 200 milliseconds even for 50,000-word documents.

AI tends to produce text with consistent, polished sentence structure — typically grade 12-16 reading level. Human writing varies more: short fragments, long compound sentences, conversational asides. The "AI sound" partly comes from this readability flatness. Most strong human writing scores grade 7-10 on Flesch-Kincaid because it varies its rhythm.