Grammar Checker
Detect and fix grammar, spelling, and punctuation errors instantly
Corrected text with highlights will appear here...
Free AI Grammar Checker — Fix Errors Instantly
WriteGenius's free grammar checker uses advanced AI to detect and fix grammar mistakes, spelling errors, punctuation issues, and style problems in seconds. Whether you're writing an email, essay, cover letter, or social media post, our online grammar corrector ensures your writing is polished and professional.
Unlike basic spell checkers, our AI-powered tool goes deeper — identifying subject-verb agreement errors, misplaced modifiers, comma splices, run-on sentences, and more. Get a detailed writing score and see every correction explained, so you learn as you write.
Why Use WriteGenius Grammar Checker?
Grammar Error Detection
Catches subject-verb agreement, tense errors, run-on sentences, fragments, and more.
Spelling & Typo Fixes
Identifies misspelled words and suggests the correct spelling instantly.
Punctuation Corrections
Fixes missing commas, apostrophe errors, semicolons, and other punctuation mistakes.
Style Suggestions
Premium users get suggestions to improve clarity, conciseness, and readability.
Writing Score
Get a score from 0–100 to understand the overall quality of your writing at a glance.
Free to Use
Check grammar for free up to 500 words. No signup required to get started.
How to Check Grammar Online
Paste Your Text
Copy and paste your text into the input box, or type directly.
Click Check Grammar
Our AI analyzes your text for grammar, spelling, punctuation, and style errors.
Review & Copy
See all corrections with explanations, then copy your corrected text.
Types of Errors We Detect
| Error Type | Examples | Plan |
|---|---|---|
| Grammar | Subject-verb agreement, tense errors, fragments | Free |
| Spelling | Misspelled words, typos, homophones | Free |
| Punctuation | Missing commas, apostrophe errors, run-ons | Free |
| Style | Passive voice, wordiness, clarity issues | Premium |
| Word Choice | Weak verbs, vague language, repetition | Premium |