Grammar check online with this free browser tool powered by LanguageTool. Paste your text, select your language, and get instant feedback on grammar errors, spelling mistakes, and style issues. No account or installation required. Click any suggestion to apply the fix directly to your text.
The Grammar Checker analyzes your text for grammar errors, spelling mistakes, and style issues using the LanguageTool engine - the same technology behind many professional writing tools. Paste any text and click Check Grammar to get an instant report with highlighted errors, explanations, and one-click fix suggestions. Errors are color-coded by type: grammar errors in red, spelling mistakes in yellow, and style suggestions in blue. The tool supports English (US and UK), German, French, Spanish, and Portuguese. It is useful for writers, students, non-native speakers, and professionals who want a second opinion on their writing before submitting, publishing, or sending. Grammar Checker is commonly used as a free grammar check online, making it a practical choice for everyday writing tasks directly in the browser. For complete results, Paraphrasing Tool can rewrite text in a different tone or style, Readability Score can analyze how easy your text is to read, and Plagiarism Checker can compare two texts for similarity.
Grammar checkers work best as a final review step rather than a replacement for careful writing. Automated tools catch surface-level errors reliably: misspelled words, missing punctuation, incorrect homophones (their/there/they're), and obvious grammar problems like subject-verb disagreement. They are less reliable for nuanced stylistic choices, domain-specific terminology, and intentional rule-breaking for creative effect. The Flesch-Kincaid readability standard, Strunk and White's Elements of Style, and the Chicago Manual of Style all describe grammar as a system with numerous exceptions, and automated tools apply rules heuristically rather than contextually. LanguageTool is one of the most accurate open-source grammar checkers available. It uses a combination of pattern-matching rules and machine learning to detect errors. It supports over 30 languages in its full version. For professional writing, a grammar checker pass followed by a human proofreading pass produces better results than either alone. For academic writing, most institutions accept LanguageTool-style checkers as a writing aid but require that students understand why each correction is made rather than applying all suggestions blindly. For content marketing, grammar correctness correlates with reader trust and reduced bounce rate - readers notice errors even when they cannot articulate why a piece feels unprofessional.