GrammarCheck is a free online grammar checker and editor that proofreads text in the browser with no account, no install and no cost.
GrammarCheck has been a staple free proofreading site for years, recommended by writing publications such as Writer’s Digest and by university library guides. Paste text into the editor and Free Check underlines grammar, spelling, punctuation and word-choice problems with one-click fixes, supporting US, UK, Canadian and Australian English. Deep Check goes further, hunting hard-to-spot issues such as run-on sentences, dangling modifiers, tense shifts and overused words that free checkers usually miss. Helpful extras include an AI content detector, a thesaurus, a title capitalizer for APA and MLA styles, and panels showing readability, reading time, speaking time and keyword density, all without registration. The site also publishes a popular library of grammar guides and infographics on commonly confused words and punctuation rules, which is how many users first discover the checker. Because nothing needs to be installed or paid for, it is often the quickest way to sanity-check an important email, application or essay before sending it, and checks run in seconds.
GrammarCheck is completely free to use in the browser; individual checks may carry text-length limits or short cooldowns. An optional app and browser extension unlock the advanced Deep Check corrections directly inside the editor, but everyday proofreading needs no payment at all.
Students, professionals and casual writers who want a fast, no-strings grammar check for essays, emails and documents without creating yet another account.