Free English grammar checker
Write a few sentences and see every mistake with the correction and the rule behind it. Made for people learning English, so you understand the fix instead of just accepting it.
Your topic
Describe a time when you had to learn something new quickly.
What you get back
Every mistake marked
Grammar, spelling, punctuation and word choice, right in your text.
The fix and the reason
“Yesterday I
gowent”: a finished time in the past takes the past simple.Stop repeating it
Short grammar lessons turn each mistake into something you know.
Questions
Is the grammar checker free?
Yes. You can check text here without an account. A free account adds a writing history, lessons and 2 deep reviews from Nib, the AI tutor, every week.
How is this different from other grammar checkers?
It is built for people learning English. Instead of silently rewriting your text, it shows each mistake, the correction and the rule behind it, so you stop making the same mistake.
What does it check?
Grammar (tenses, articles, agreement, prepositions), spelling, punctuation and word choice. With an account, Nib also looks at structure, vocabulary range and how natural your writing sounds, and estimates your CEFR level.
Can it help with IELTS or TOEFL writing?
Yes. Check your practice answers here, or use the exam practice on PenLingo to write timed IELTS, TOEFL, Cambridge, PTE and Duolingo tasks and get them scored.
Looking for something to write about? Try one of our writing prompts.