Free grammar checker
Paste your text and Verbao will fix the grammar in seconds - tense slips, subject-verb agreement, comma splices, missing articles and awkward phrasing. Free up to 500 words per check.
What Verbao catches
The team were vs the team was - Verbao knows the difference in UK and US English.
Spot when a paragraph drifts between past and present without meaning to.
Comma splices, missing Oxford commas, apostrophes for possession, quotes and dashes.
Real words in the wrong order - Verbao rewrites the sentence, not just the word.
A / an / the - including the tricky ones like 'an historic' vs 'a historic'.
their/there/they're, your/you're, its/it's, affect/effect and 30+ more.
Your browser only flags words the dictionary doesn't recognise. Verbao reads the whole sentence - so it catches the real word used wrongly ("effect" for "affect"), the missing verb, and the tense that suddenly jumps from past to present.
FAQ
Is Verbao's grammar checker really free?
Yes. You can check up to 500 words per go with no account, no card and no ads. Sign up (still free) to save history; upgrade only when you want unlimited length.
What kinds of grammar mistakes does it catch?
Subject-verb agreement, tense consistency, comma splices, run-on sentences, misplaced modifiers, article errors (a/an/the), preposition slips, pluralisation and possessive apostrophes.
Does it work for UK English?
Yes - Verbao is locale-aware. Toggle UK English and it will accept 'colour', 'organise' and single quotes; toggle US English for 'color', 'organize' and double quotes.
How is it different from a spell checker?
A spell checker only flags words that don't exist in the dictionary. Verbao's grammar checker also flags real words used incorrectly, tense mismatches, and sentences that read badly - with a fix suggested inline.