Commonly Confused Words Checker
Paste your text to highlight commonly confused words — their/there/they're, affect/effect, its/it's, then/than — with the usage rule for each pair. The tool flags candidates for you to verify; it does not know which word you meant, so review each highlight against its rule.
Frequently Asked Questions
- What does the confused words checker do?
- It scans your text against a list of about 45 commonly confused word pairs and triples — their/there/they're, affect/effect, its/it's, then/than — highlights every occurrence, and shows the usage rule for each pair so you can verify you used the right one.
- Does the tool know which word I meant to use?
- No. The tool flags candidates for you to verify — it cannot tell from context which word you intended. Each highlight comes with the rule for its pair so you can decide quickly whether your usage is correct.
- Which confused word pairs are covered?
- Around 45 pairs and triples, including their/there/they're, its/it's, affect/effect, then/than, your/you're, to/too/two, loose/lose, whose/who's, accept/except, advice/advise, complement/compliment, principal/principle, stationary/stationery, weather/whether, and cite/site/sight.
- Why are correct words highlighted too?
- Every member of a confused pair is highlighted, correct or not, because the tool cannot judge intent. Most highlights will be fine — the value is in the few that are not, which spell checkers miss because the wrong word is still a real word.
- Is my text sent to a server?
- No. The check runs entirely in your browser — your text is never uploaded, stored, or shared.