How does the grammar checker work?

Our tool uses an AI language model to analyze your text for grammar, spelling, punctuation, and style errors. It returns a corrected version along with a list of each issue found and an explanation of why it's wrong.

What types of errors does it detect?

The checker detects four types of issues: grammar errors (subject-verb agreement, tense issues), spelling mistakes, punctuation errors (missing or misplaced commas, periods, etc.), and style suggestions (awkward phrasing, wordiness).

What does the score mean?

The score ranges from 0 to 100, where 100 means no errors were found. A score above 90 is excellent, 70-90 is good with minor issues, and below 70 suggests significant grammar or spelling problems that need attention.

Is there a character limit?

Yes, the free tool accepts up to 3,000 characters per request. For longer content, split your text into sections and check each one separately.

Is this tool free to use?

Yes, completely free with no signup required. You can check up to 5 texts per hour. For unlimited AI content generation with built-in grammar checking, check out RobotSpeed's paid plans.

Free Tool — No Signup Required

Grammar Checker

Name: RobotSpeed
Availability: InStock
Rating: 4.9 (127 reviews)
Author: RobotSpeed

Paste your text and get instant grammar, spelling, and punctuation corrections. Powered by AI.

Your Text

0/3000 characters

How It Works

Paste your text

Paste any text you want to check — an email, essay, blog post, or anything else.

AI analysis

Our AI analyzes your text for grammar, spelling, punctuation, and style issues.

Review corrections

See each error highlighted with an explanation, plus a corrected version ready to copy.

Why Use a Grammar Checker?

Good grammar builds credibility. Whether you're writing an email, a blog post, or a school essay, grammar mistakes distract readers and undermine your message.

Our AI grammar checker catches errors that spell-checkers miss — subject-verb agreement, misplaced commas, awkward phrasing, and more. Get a score and fix everything in seconds.

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