Free Grammar Checker Online

Grammar mistakes are the kind of error that turns a polished argument into a distraction — the reader notices the comma splice or the dangling modifier and stops following the actual point. Our online Grammar Checker reads your text and flags the categories of error that matter most in everyday writing: subject-verb agreement ("the team are/is"), run-on sentences and comma splices, missing or misplaced commas, dangling and misplaced modifiers, passive voice (flagged but not always wrong — sometimes passive is the right choice), redundant phrasing ("each and every," "in order to," "due to the fact that"), tense inconsistency inside a paragraph, and the homophone confusions a pure spell checker cannot catch ("their/there/they're," "its/it's," "your/you're," "affect/effect"). Each flagged issue comes with an explanation of *why* it is an issue and a suggested rewrite, not just a red squiggle — the explanation matters because it lets you decide whether the suggestion actually applies (passive voice in a scientific paper, for instance, is often correct and the suggestion can be safely ignored). The tool is built for the editing pass that comes after the draft, when you are already happy with what you said and you just want to clean up *how* you said it. Common workflows: polishing a job application cover letter, editing a blog post before publishing, proofing client-facing emails, tightening an essay before submission, and reviewing AI-generated text for the giveaway grammar quirks LLMs frequently produce. The check runs entirely in your browser, which means no character limit and no chance of a confidential email landing in a third-party server log. Pair it with the Spell Checker for a complete two-pass proofread: spelling first, grammar second.