Grammar Checker
Catch common grammar mistakes, spelling errors, and style issues — rule-based, runs instantly in your browser.
Common errors this tool catches
What this grammar checker does
This Grammar Checker scans your text for common English mistakes that slip past a quick read-through: missing apostrophes in contractions, confused word pairs, frequent misspellings, repeated words, spacing problems, and capitalisation slips. Each issue is labelled by type (Spelling, Grammar, Punctuation, or Style) and shown with a short snippet of surrounding text so you can see exactly where it occurs and a suggested correction.
It is built for everyday writing rather than academic proofreading. Students checking an essay, professionals reviewing an email before they hit send, and bloggers tidying a draft will all find it useful for catching the errors people make most often. Because the checker is rule-based and runs locally, it returns results the instant you click the button, with no sign-up and no waiting on a server.
How to use it
Paste or type your text into the box and click "Check Grammar". The tool highlights up to 20 issues at a time, each with its category, a plain-English explanation of the problem, the exact context where it was found, and a recommended fix. If nothing is flagged, you will see an "All Clear" confirmation.
Review every suggestion in context rather than accepting it blindly. A rule-based checker recognises patterns, not meaning, so it can occasionally flag a phrase that is actually correct for your sentence. Read the message, decide whether it applies, and edit your original text accordingly. For long documents, check one section at a time so the list of issues stays easy to work through.
What it catches and what it does not
The checker reliably catches errors such as "your" versus "you're", "their" versus "there", "should of" instead of "should have", missing apostrophes in words like don't and can't, repeated words, a missing space after a period, a lowercase pronoun "i", extra whitespace, and a curated list of common misspellings like alot, recieve, and seperate.
It does not understand the full meaning of a sentence, so it will not catch every subtle grammar problem, rephrase awkward wording, or judge tone and argument. Think of it as a fast first pass that handles the predictable mistakes, freeing you to focus your own attention on clarity and style.