Free Spell Checker Online

Most spelling errors are not exotic — they are the same dozen confusions repeating themselves: "their/there/they're," "its/it's," "loose/lose," "affect/effect," "definitely/definately," and the silent typo where your finger hits the wrong key and the result is still a real English word so the underline never appears. Our online Spell Checker catches both kinds. It works against a comprehensive English dictionary (US and UK spellings) plus a frequency-weighted suggestion engine that ranks corrections by how likely each one is given the surrounding text, rather than dumping ten unsorted alternatives on you. Paste in an email, an essay, a blog post, a product description, a cover letter, or a social media caption, and every misspelled word is highlighted with a one-click fix suggestion. Proper nouns, technical terms, and your own brand names can be added to a session whitelist so they stop being flagged after the first time — the dictionary is custom-extensible per session without storing anything across visits. The checker handles contractions, hyphenated compounds, and possessives correctly (it knows "don't" is a real word and "dont" is not). What it does not do — by design — is rewrite your sentences for style or grammar; for those, use the Grammar Checker. The split exists because conflating spelling and grammar in one pass produces noisy, contradictory suggestions; checking one layer at a time is faster and gives cleaner output. The whole pipeline runs locally in JavaScript, which is why there is no character limit and no daily quota: nothing is sent over the network. Real-world workflows: proofing a job application before submitting, scrubbing client emails for embarrassing typos, double-checking blog drafts before publishing, and catching the subtle homophones AI grammar tools often miss.