AI Grammar Checker
Find and fix grammar, spelling, and punctuation errors with detailed explanations.
Input Text
Results
Enter text and click "Check Grammar" to get started
Introduction
Typos and grammatical errors undermine credibility in professional emails, academic papers, and published blog posts. A grammar checker scans your text for subject-verb agreement mistakes, misplaced modifiers, comma splice run-ons, homophone confusion (their/there/they're), and hundreds of other error patterns that spell-checkers alone cannot detect. By catching mistakes before you hit send or publish, a grammar checker acts as a tireless second pair of eyes that never overlooks a dangling participle.
What Is Grammar Checker?
A grammar checker is a text-analysis utility that parses sentences to identify syntactic errors, punctuation inconsistencies, and stylistic weaknesses. Unlike basic spell-check, it understands parts of speech and sentence structure, which allows it to flag errors like "The team are winning" (subject-verb disagreement with a collective noun) or "Me and John went to the store" (incorrect pronoun case in a compound subject).
The tool goes beyond hard grammar rules to offer style suggestions. It detects passive voice constructions ("The report was written by Sarah"), wordy phrases ("due to the fact that" instead of "because"), and cliches that weaken writing. Each suggestion comes with a brief explanation so you learn the rule behind the correction rather than blindly accepting changes.
Privacy is central to the design: all text analysis runs locally in your browser. Your essays, legal documents, and private correspondence are never transmitted to a remote server, making this tool suitable for confidential and regulated environments where cloud-based writing assistants cannot be used.
Grammar Checker Examples
| Input | Output |
|---|---|
| She dont know what their doing. | She doesn't know what they're doing. (2 fixes: verb agreement, homophone) |
| The results was significant, the team celebrated. | The results were significant, and the team celebrated. (comma splice + agreement) |
| Me and him went to the meeting early. | He and I went to the meeting early. (pronoun case correction) |
Key Features of Grammar Checker
- Detects over 200 grammar rules including subject-verb agreement, dangling modifiers, and misplaced apostrophes
- Homophone and commonly confused word detection (affect/effect, lose/loose, complement/compliment)
- Punctuation analysis for comma splices, missing Oxford commas, and incorrect semicolon usage
- Style suggestions for passive voice, wordiness, and overly complex sentence constructions
- One-click correction with a brief explanation of the grammar rule behind each suggestion
- Readability scoring using the Flesch-Kincaid grade level to gauge text complexity
- Fully offline analysis — no text is sent to any server, preserving document confidentiality
Together, these capabilities transform the grammar checker from a simple error detector into a comprehensive writing assistant that strengthens both correctness and clarity. The breadth of over 200 grammar rules means subtle mistakes — like a misplaced apostrophe in "its vs. it's" or a dangling modifier that changes your sentence's meaning — are caught before they reach your audience, whether that audience is a hiring manager reading your cover letter or a reviewer evaluating your manuscript. Style suggestions and readability scoring go beyond correctness to help you write more persuasively, trimming passive constructions that weaken arguments and flagging convoluted sentences that lose readers. Because every correction includes an explanation, the tool also serves as an ongoing writing tutor: over time, you internalize the rules and make fewer mistakes in your first draft. And with fully offline analysis, professionals in legal, medical, and corporate environments can proofread sensitive documents without worrying that confidential text is being transmitted to a third-party cloud service.
How It Works
Paste Your Text for Analysis
Enter the text you want checked into the input area. The grammar checker scans for spelling errors, subject-verb agreement problems, incorrect verb tenses, misplaced punctuation, run-on sentences, and other common writing mistakes that can undermine clarity and credibility.
Review Flagged Issues with Explanations
The tool highlights each detected error and provides a brief explanation of why it was flagged. Issues are categorized by type such as grammar, spelling, or punctuation, making it easy to prioritize corrections and learn from your mistakes.
Apply Suggested Fixes and Copy
Each flagged issue comes with one or more correction suggestions. Accept a suggestion to automatically fix the error, or ignore it if the original phrasing was intentional. Once you have reviewed all suggestions, copy the polished text for your final document.
Who Uses This
Academic Writers
checking research papers and essays for grammatical errors before submission, ensuring their arguments are not undermined by avoidable writing mistakes that distract reviewers
Non-Native English Speakers
identifying subtle grammar and preposition errors that are difficult to self-correct, using the explanations to understand why a particular construction is wrong and how to fix it
Business Professionals
proofreading important emails, proposals, and reports where grammatical mistakes could damage credibility with clients, investors, or executive leadership