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Grammar & Proofreading

Check grammar, spelling, punctuation, readability and writing style.

Grammar CheckerCheck grammar, spelling and punctuation. The checker runs in your browser and your text is not uploaded.Spell CheckerFind spelling mistakes in American, British, Canadian, Australian or Indian English.Readability CheckerGet Flesch, Flesch-Kincaid, Gunning Fog, SMOG and other readability scores for your text.Clarity CheckerHighlight long sentences, passive voice, adverbs and wordy phrases so you can simplify them.Passive Voice CheckerHighlight sentences written in the passive voice, like “the report was written”.Adverb FinderHighlight adverbs ending in -ly and words like “very” and “really”.Filler Word FinderFind filler words such as “just”, “basically” and “kind of” and remove them.Cliché & Buzzword FinderFind clichés and business buzzwords in your text.Wordy Phrase CheckerFind wordy phrases like “in order to” and replace them with shorter ones.Repeated Word FinderFind repeated words, such as “the the”, and words used too often close together.Sentence Length CheckerHighlight long sentences and see a chart of every sentence’s length.Punctuation CheckerFind spacing mistakes, unclosed brackets and quotes, and repeated punctuation.Confused Words CheckerCheck commonly confused words such as their/there/they’re, its/it’s and affect/effect.Consistency CheckerFind places where the same thing is written two ways, like “email” and “e-mail” or US and UK spelling.Inclusive Language CheckerFind gendered and other non-inclusive terms and get neutral alternatives.US ↔ UK Spelling ConverterConvert American spelling to British spelling, or British to American.

Proofreading that stays on your device

The grammar and spell checkers run Harper, an open-source engine compiled to WebAssembly, in your browser. The style tools (clarity, passive voice, wordiness, clichés, consistency and inclusive language) use transparent rules and curated word lists, so every highlight comes with a reason. Nothing you type is uploaded, and there are no word limits.

Questions

Is there a free grammar checker that doesn’t upload my text?

Yes. The Grammar Checker runs Harper, an open-source grammar engine, inside your browser. Nothing is sent to a server and there is no word limit.

How can I make my writing clearer?

Start with the Clarity Checker for hard sentences, passive voice and adverbs, then the Wordy Phrase Checker and Readability Checker.

Can I check British spelling?

Yes. The grammar and spell checkers support American, British, Canadian, Australian and Indian English, and the US ↔ UK Spelling Converter switches a whole text.