Free AI Grammar Checker — Fix Grammar & Spelling Errors
Paste your text to check for grammar, spelling, and punctuation errors. Our AI-powered grammar checker identifies mistakes and suggests corrections instantly.
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What Is a Grammar Checker?
A grammar checker is a tool that scans your text for grammatical errors, spelling mistakes, punctuation issues, and style problems. It identifies common mistakes like subject-verb disagreement, misplaced modifiers, run-on sentences, and incorrect word usage (their/there/they're, its/it's).
Our grammar checker uses AI to go beyond basic rules. It understands context, catches errors that simple spell checkers miss, and suggests improvements for clarity and readability. Whether you're writing an email, essay, blog post, or business document, it helps you write with confidence.
Why Use a Grammar Checker?
Even experienced writers make mistakes. A grammar checker catches what your eyes miss.
Protect Your Credibility
Grammar errors undermine your message. Readers judge your competence by your writing quality — a single typo in a cover letter or proposal can cost you an opportunity.
Save Editing Time
Instead of reading your text multiple times looking for errors, paste it into the grammar checker and get all issues flagged at once. Fix everything in one pass.
Improve Your Writing
Our grammar checker doesn't just fix errors — it explains them. Over time, you'll learn to avoid common mistakes and write more confidently without the tool.
Support for Non-Native Speakers
If English is your second language, a grammar checker is essential. It catches the subtle errors that non-native speakers commonly make — preposition usage, article placement, and phrasal verbs.
Grammar Checker Features
A complete writing quality tool that goes beyond basic spell check.
Grammar Error Detection
Catches subject-verb agreement errors, tense inconsistencies, misplaced modifiers, dangling participles, and other grammatical issues that change meaning.
Spelling & Typo Correction
Identifies misspellings, typos, and commonly confused words. Handles homophones (their/there/they're, your/you're, its/it's) based on context.
Punctuation Check
Flags missing commas, incorrect semicolon usage, comma splices, and other punctuation errors that affect readability and meaning.
Style Suggestions
Identifies passive voice, overly complex sentences, redundant phrases, and wordiness. Suggests clearer, more direct alternatives.
Clarity Improvements
Highlights confusing sentences, ambiguous phrasing, and unclear references. Helps ensure your reader understands exactly what you mean.
Instant Results
Paste your text and see errors highlighted immediately. No waiting, no file uploads — just fast, accurate grammar checking.
Grammar Checker Comparison
How our grammar checker stacks up against the most popular alternatives.
| Feature | HumanizerAI | Grammarly | LanguageTool |
|---|---|---|---|
| Grammar & spelling check | |||
| AI-powered suggestions | |||
| Built-in AI detection | |||
| Paraphrasing tool | |||
| Style improvements | |||
| Free tier available | |||
| No signup to try | |||
| AI humanization |
Who Uses a Grammar Checker?
Students & Academics
Check essays, research papers, and assignments for errors before submitting. Ensure your academic writing meets the expected standards for grammar, punctuation, and clarity.
ESL Learners
If English is your second language, our grammar checker catches the subtle errors native speakers recognize instinctively — article usage, preposition placement, and idiomatic expressions.
Business Professionals
Polish emails, reports, proposals, and presentations before sending. Grammar errors in professional communication signal carelessness — our tool ensures your writing is clean.
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Grammar Checker FAQ
How accurate is this grammar checker?
Our AI grammar checker catches the vast majority of common grammar, spelling, and punctuation errors. For best results, we recommend using it as a second pair of eyes alongside your own proofreading — no automated tool catches 100% of errors in every context.
Is this grammar checker free?
Yes, you can check your text for grammar errors for free. For advanced features like AI-powered style improvements and full document processing, premium plans start at $7/month.
Is my text stored when I use the grammar checker?
We do not store your text permanently. Text submitted for grammar checking is processed in real-time and not saved to any database. Your content remains private.
Can it check grammar in languages other than English?
Currently, our grammar checker is optimized for English text. For other languages, we recommend LanguageTool which supports over 30 languages.
How is this different from Grammarly?
Grammarly is a comprehensive writing assistant with browser extensions and desktop apps. Our grammar checker focuses on quick, instant grammar checking without requiring an account or extension — plus it's part of our AI writing toolkit that includes AI detection, humanization, and paraphrasing.
Can I check long documents?
Yes. Our grammar checker handles documents of any reasonable length. For very long documents (10,000+ words), we recommend checking in sections for the most accurate results.
Write Better with AI-Powered Grammar Checking
Check your text for grammar, spelling, and punctuation errors — then explore our full suite of AI writing tools.