What does the stiffness score measure?
It measures eight surface habits of formal writing: how often you contract words, commas per sentence, semicolons, colons before a list, the spread of sentence lengths, the share of sentences over 20 words, formal openers and closers, and parentheses. Each habit gets a weight, and the weighted total lands between 0 and 100. The score is a review aid, not a verdict.
Is my draft uploaded?
No. The draft stays in this browser. The tool makes no network call with your text. Basic usage events carry a rule ID, the level, and whether the text came from the example. They never carry draft text.
Why not just ask AI to rewrite it?
A rewrite replaces your words with new ones, so it adds a new layer of generic phrasing. Every rule here only shrinks a phrase or swaps it for a shorter one. The tool never adds a word you did not write, and it never invents a fact.