Grammar Checker
Check grammar, spelling, punctuation, and style errors instantly
How the Grammar Checker Works
This tool scans your text for common grammar mistakes, spelling errors, punctuation issues, and style problems. It checks for double spaces, repeated words, missing capitalization, confused words (their/there/they're, its/it's, your/you're), and common misspellings. All processing happens in your browser — your text is never sent to any server.
Common Grammar Mistakes to Avoid
The most frequent grammar errors include confusing homophones (words that sound alike but have different meanings), run-on sentences, missing punctuation, and incorrect capitalization. Words like "their/there/they're", "its/it's", and "your/you're" are among the most commonly confused in English writing. Similarly, "affect" (verb) vs "effect" (noun) and "then" (time) vs "than" (comparison) cause frequent mistakes.
Tips for Better Writing
Keep sentences concise and clear. Read your text aloud to catch awkward phrasing. Use active voice when possible. Proofread after taking a break from writing. Pay attention to subject-verb agreement and consistent tense usage throughout your text.