Free Writing Tool
Grammar Checker
Paste a sentence, an email or an essay paragraph. Get instant corrections for grammar, spelling and punctuation, with a plain-English explanation of every rule.
Frequently asked questions
Is the grammar checker free?
Yes. The MyProGrammar grammar checker is completely free to use, with no sign-up required. You can check up to 2,000 characters at a time.
What kinds of mistakes does it find?
It flags grammar errors (such as subject-verb agreement, tense and article mistakes), spelling errors, punctuation problems and poor word choices, then explains the rule behind each correction.
Does it rewrite my writing?
No. The checker keeps your meaning, tone and style. It only corrects genuine errors, so your voice stays your own.
How can I stop making the same mistakes?
Every correction links to the matching MyProGrammar lesson where one is available. Study the lesson, then take the quiz to lock the rule in.