Text Counter & Analyzer

What the readability scores actually measure

Both Flesch formulas combine exactly two inputs: average words per sentence, and average syllables per word. Reading Ease maps those onto a 0-100 scale where higher is easier, and Flesch-Kincaid maps them onto a US school grade level. Because they only see sentence length and word length, they reward short sentences and short words regardless of meaning — a page of short nonsense scores as highly readable, and a precise technical sentence using necessary long words scores as hard. That makes them useful as a drafting signal: a grade level that jumps in one section usually means sentences have grown unwieldy there. It does not make them a measure of clarity, and no score should override a human read.

Keyword density in its proper place

Keyword density was once treated as a ranking lever, and writers would pad text until a phrase hit some supposed optimal percentage. Search engines have not worked that way for a long time; they model topics and intent rather than counting repetitions, and obvious repetition is more likely to hurt than help. What density is still genuinely good for is proofreading: it surfaces the word you have unconsciously used eleven times in four paragraphs, and it shows at a glance whether a draft is actually about the subject you intended. This tool removes common filler words from the count for that reason — a list topped by "the" and "and" tells you nothing about what you wrote.