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Grammar Checker

Free web tool that finds grammar, spelling and punctuation errors in English text

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  • Founded 2018
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About Grammar Checker

Grammar Checker, run at GrammarChecker.io, is a browser-based proofreading tool for written English. Users paste text into its editor and the tool marks grammar, spelling and punctuation problems, with an explanation and suggested fix for each so the writer can decide whether to accept it.

What Grammar Checker offers

  • Grammar checking — text is tested against more than 3300 rules, covering issues such as subject-verb agreement and tense.
  • Spelling and punctuation checks — errors highlighted directly in the pasted text.
  • Sentence suggestions — proposed fixes for sentence structure and errors that depend on context.
  • Regional English — support for the US, UK, CA and AU variants of English.
  • Grammar quizzes — short exercises to help users learn common rules.

Who it works with

Content writers, bloggers, editors, SEO writers and students, as well as people writing in English as a second language.

Key facts

  • Based in: United States
  • Technology: AI and natural language processing
  • Access: used online through a web editor, with no charge stated for checking

Profile written by TrustList from the business's own published information, Sep 2026.

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