Free Grammar Checker
Paste any text and get instant feedback on spelling, punctuation, and common grammar mistakes. No account, no limits, no waiting.
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An Honest, Rule-Based Grammar Checker
Most grammar checkers are black boxes: you paste text, an AI somewhere on a server rewrites your sentences, and you never learn what changed or why. This tool takes the opposite approach. It runs a set of hand-written pattern rules directly in your browser, flags each match, and tells you exactly what rule fired and what the fix is. There is no AI involved, which means two things you should know up front.
First, it catches common mechanical errors reliably: misspellings, doubled words, extra spaces, punctuation spacing, sentence capitalization, missing apostrophes, often-confused word pairs, and basic subject-verb mistakes like "we was". Second, it will not catch everything. It cannot understand meaning, so a wrong word that happens to be spelled correctly will slip past unless it is on the confusables list. It will not fix your style, your structure, or your argument. Think of it as a careful first pass, not a replacement for proofreading. For the full picture, read our guide to checking grammar online.
What This Checker Catches
The engine scans your text with sixteen rule families, all running locally:
| Category | What it flags |
|---|---|
| Spelling | Common misspellings such as recieve, definately, seperate, and accomodate, with the correct form suggested. |
| Confusable words | Their / they're / there, your / you're, its / it's, then / than, affect / effect, too / two, lose / loose, and more, flagged for you to verify in context. |
| Repeated words | Doubled words like "the the", with a note that some doubles (had had) are legitimate. |
| Spacing | Double spaces, spaces before punctuation, and missing spaces after punctuation. |
| Capitalization | Sentences and lines that start lowercase, and the pronoun "i" written lowercase. |
| Apostrophes | Missing apostrophes in common contractions: dont, cant, wont, im, youre, and similar. |
| Word choice | "Could of" corrected to "could have", "in regards to" to "in regard to", "alot" to "a lot", "irregardless" to "regardless". |
| Agreement | Basic subject-verb mismatches such as "we was" or "he were". |
| Punctuation | Doubled exclamation or question marks, and ellipses longer than three dots. |
What It Will Not Catch
Honesty matters more than a long feature list. This checker will miss wrong-word errors outside its confusables list (for example, "bare" where you meant "bear"), tense inconsistencies across paragraphs, run-on sentences, sentence fragments used deliberately, awkward phrasing, tone problems, and anything factually wrong. If your writing needs meaning-level review, pair this tool with a careful human read or an AI editor, and paste only text you are comfortable sharing with that service.
Why Most Free Grammar Checkers Are Not Private
Nearly every browser-based grammar checker works the same way: your text is sent to a company server, analyzed there, and the results are sent back. That is how AI-powered suggestions work, and it means your drafts, emails, cover letters, and manuscripts pass through someone else's infrastructure. Some services keep copies for product improvement or model training, governed by privacy policies most people never read.
This checker exists because that trade is not always worth it. The rules run as JavaScript in this page. Open your browser's network tab while you type: you will see no requests carrying your text anywhere. There is no account to create, no document history stored, and nothing to delete later. It is the right tool when the text is sensitive, or when you simply prefer that your writing stays yours.
Who Uses a Grammar Checker
Students run essays and applications through a checker before submitting. Job seekers proofread resumes and cover letters where one typo can end a candidacy. Freelancers clean up client deliverables and pitches. Non-native English writers catch the mechanical errors that fluency usually hides. Bloggers and newsletter writers do a final pass before publishing. Anyone who writes under deadline uses it as a safety net, because tired eyes skip exactly the errors a rule engine never misses.
If a scan comes back clean and you want a second opinion on tone or flow, our AI Detector can tell you whether your draft reads as machine-written, and the AI Humanizer can loosen up stiff phrasing. For longer writing projects, the AI Writing Suite covers drafting and rewriting.
Frequently Asked Questions
Is this grammar checker really free?
Yes. Free, unlimited, no signup, no account, no usage caps. Because the checking runs in your browser, there is no server cost per check to pass on to you.
Is my text sent to a server?
No. Every check runs in your browser with JavaScript, and this tool makes no network requests carrying your text. Your writing never leaves your device, so it cannot be stored, logged, or used for training.
What does a rule-based checker catch?
Common mechanical errors: misspelled words, doubled words, extra or missing spaces, punctuation mistakes, sentence capitalization, missing apostrophes, often-confused word pairs like their/they're/there, and basic subject-verb mistakes like "we was".
What will it miss?
Anything requiring an understanding of meaning: wrong words that are spelled correctly, tense drift across paragraphs, awkward phrasing, tone, structure, and factual errors. It is a first pass, not a replacement for proofreading.
How is this different from Grammarly?
Grammarly is AI-powered, sends your text to its servers, and reserves features for accounts and paid plans. This checker is rule-based and fully local: no account, no server, no data collection. The trade-off is narrower coverage of subtle issues.
Does it work on long documents?
Yes. Local checking means no server timeouts or per-request limits. Essays, articles, cover letters, and chapters check instantly in the page.
Can I use it offline?
Once the page has loaded, the checking itself needs no internet connection. The rules run entirely in your browser.
Does it check spelling too?
Yes. It includes a list of the most commonly misspelled English words, such as receive, definitely, separate, and accommodate, and suggests the correct spelling for each one it finds.