Grammar Checker

How accurate is this compared to Grammarly or ProWritingAid?

Grammarly and ProWritingAid combine rule-based checks with ML models trained on billions of words, which catches context-dependent errors this tool does not. For the common 80 percent of grammar and spelling mistakes — subject-verb agreement, article usage, homophone confusions, punctuation errors — the output is comparable. For nuanced style suggestions, tone-matching, and rare constructions, a paid tool with ML refinement will outperform. Use this as a first pass for quick drafts and non-critical writing, and reserve Grammarly Premium or ProWritingAid for high-stakes documents like legal contracts, academic publications, or client-facing proposals where every nuance matters.

Why did the checker flag a sentence that I know is grammatically correct?

Rule-based checkers pattern-match against common error templates and sometimes flag false positives, especially for: technical jargon or acronyms the dictionary does not know, legitimate uses of passive voice in scientific or formal writing, long sentences that are well-constructed but exceed the length threshold, complex sentences with multiple subordinate clauses that confuse the subject-verb agreement heuristic, and British versus American spelling variants if the checker is set to one and your document uses the other. Read each flag, decide if it reflects an actual error or a false positive, and ignore accordingly.

Does this work for British English, or only American English?

The checker supports both major dialects. Color/colour, organize/organise, traveled/travelled, and similar spelling variants all pass validation regardless of which convention you use within a document, though you should stick to one consistently. Grammar rules are largely identical between US and UK English, with minor exceptions like collective noun agreement (American 'the team is winning' versus British 'the team are winning' both acceptable) and punctuation inside versus outside quotation marks. The checker is conservative on these dialect-specific rules and will not flag either convention as wrong.

Can the checker handle creative writing, or is it only for business prose?

It works for creative writing with caveats. Grammar and spelling rules are universal, but style suggestions (avoid passive voice, shorten sentences, eliminate adverbs) are calibrated for business and journalistic prose. Creative fiction deliberately breaks some of these rules — a literary novel might use 40-word sentences for rhythm, passive voice for distance, or adverbs for character voice. Accept the grammar and spelling fixes, ignore or selectively apply the style suggestions, and remember that voice and rhythm in creative writing are more important than adherence to a mechanical style rubric.

Is my text sent to a server or stored anywhere?

No. Spell-check and grammar analysis run entirely in your browser using a dictionary and rule set loaded once when the page opens. There is no API call, no server round trip, no logging. This matters if you are checking confidential drafts — book manuscripts pre-publication, client proposals under NDA, internal company communications, medical or legal writing with privileged content. You can verify this in your browser's developer tools (Network tab shows zero requests during checking) and for absolute certainty, disconnect from the network before pasting — the tool continues working identically.