Free Grammar Checker
Paste your draft to catch repeated words, a/an errors, punctuation slips, its/it’s and then/than mix-ups, and 40+ common misspellings. Rule-based and deterministic — no AI, no sign-up, no word limit, and your text never leaves your browser.
What this checker looks for
- Repeated words(“the the”) — with legitimate doublings like “had had” left alone.
- a / an agreement, aware of pronunciation exceptions (“a university”, “an hour”).
- Punctuation: spaces before punctuation, missing spaces after commas, repeated punctuation, double spaces.
- Common confusions: “should of” → “should have”, then/than, its/it’s, “alot”, “irregardless”.
- Capitalization: a lowercase standalone “i” and sentences that start lowercase (abbreviations like “et al.” excluded).
- 40+ common misspellings (“definately”, “seperate”, “recieve”…).
Every finding is advisory and deterministic — the same input always gives the same result, and your text is never modified or uploaded. Pair it with the Passive Voice Detector, Readability Checker, and APA Citation Checker for a full pre-submission pass.
Frequently Asked Questions
- What does this grammar checker catch?
- High-confidence, rule-based issues: repeated words (“the the”), a/an agreement (“a interesting” → “an interesting”), spaces before punctuation and missing spaces after commas, repeated punctuation, double spaces, modal + “of” (“should of” → “should have”), then/than and its/it’s confusions, a lowercase standalone “i”, sentences starting lowercase, and 40+ of the most common English misspellings.
- Is it free, and is my text uploaded anywhere?
- Completely free — no sign-up, no word limit, no premium tier. The checker runs entirely in your browser: your text is never sent to a server, never stored, and never used to train anything.
- How is this different from AI grammar checkers?
- It is deterministic: a fixed set of transparent rules, the same result every time, and no chance of an AI “hallucinating” a rewrite that changes your meaning. The trade-off is scope — it catches mechanical errors with high confidence but does not judge style, tone, or complex agreement. Think of it as a fast first pass before a careful human read.
- Will it rewrite my essay?
- No. It never modifies your text. Each finding shows the issue, the location, and — where safe — a copyable suggestion. You decide what to change, which also keeps you on the right side of academic-integrity policies that prohibit automated rewriting.
- Does it check citations too?
- Not this tool — but CitationEasy has dedicated checkers: the APA Citation Checker and MLA Citation Checker lint your reference list, and the Reference Extractor cross-checks in-text citations against it. Together they cover the writing and the citing.