calculatory.app

Writing Tools

6 free tools for writers, editors and students. Paste your text, get the answer — nothing leaves your browser.

Word & Character Counter

Count words, characters, sentences, and paragraphs. See reading time, keyword density, and social media limits.

Case Converter

Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case.

AI Writing Pattern Checker

Highlight the stock phrases, uniform rhythm and filler transitions that make writing read as AI-generated, with a plainer alternative for each.

Readability Checker

Get Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog, SMOG, Coleman-Liau and ARI scores, plus the long sentences to cut first.

Text Compare

Compare two versions of a text and see every addition and deletion, line by line or word by word. Ignore case and whitespace.

Lorem Ipsum Generator

Generate placeholder text by paragraph, sentence or word, as plain text or HTML paragraphs, and copy it in one click.

About these tools

This category is for the mechanical side of writing — hitting a word limit, fitting a post into a character count, or fixing the capitalisation of a headline — so the thinking can stay on what you're actually saying.

The Word & Character Counter tracks words, characters, sentences, paragraphs and reading time, with keyword density and live character limits for X, LinkedIn and Instagram. The Case Converter switches text between uppercase, lowercase, Title Case and sentence case, plus camelCase, snake_case and kebab-case for technical writing.

The Readability Checker scores a draft on six standard formulas and lists the longest sentences, so you know where to cut first. The AI Writing Pattern Checker highlights the habits that make text read as machine-written and suggests plainer wording. It deliberately doesn't claim to detect who wrote a text, because no tool can do that reliably. Text Compare shows exactly what changed between two versions of a draft, a contract or a file. The Lorem Ipsum Generator fills layouts with placeholder text until the real copy arrives.

Your text is processed entirely in your browser and never sent to a server — which matters when the draft is an unpublished article, a client document or an essay.