Grammar Checker

Grammar Checker is a free online tool that catches grammar mistakes, spelling errors, and punctuation slip-ups in your writing. You just type or paste text into the box, click the check button, and it highlights problem areas with suggestions for fixes. It works across 21 languages including English, Spanish, French, and Japanese, making it useful for non-native speakers too.

The tool goes beyond simple spell-check. It looks at context to flag tricky errors like misused homophones (their/there/they're), incorrect verb tenses, and misplaced commas. It also checks readability — it points out run-on sentences, overly long words, and passive voice constructions that can make writing harder to follow. The interface is straightforward: a clean text editor with word and character counters, a sample text button to test it out, and a link to a more advanced version on a sister site.

Grammar Checker is best for anyone who needs quick, no-nonsense proofreading — students polishing essays, professionals double-checking emails, or bloggers cleaning up drafts. It's not as full-featured as premium tools like Grammarly, but it's fast, free, and gets the basics right. If you just need to catch common errors without signing up or paying, this is a solid option.