Grammar Checker
Paste your text below and click Check Grammar. Detects common typos, repeated words, missing capitals, spacing errors, and punctuation mistakes. No signup — your text stays in your browser.
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Why Run a Grammar Check Before You Send?
Even careful writers miss things. A single typo in an email to a client, a repeated word in a cover letter, or a missing capital at the start of a sentence can undermine an otherwise polished piece of writing. A quick grammar check catches the mechanical errors that slip past when you're focused on content.
When to Use a Grammar Checker
- Emails — one typo in a professional email can make a poor first impression. Run a check before sending anything important to a client, employer, or new contact.
- Essays and academic papers — repeated words, missing punctuation, and misspellings cost marks. A grammar check catches the easy fixes so your teacher's attention goes on content, not mechanics.
- Blog posts and articles — readers notice typos, even if they don't comment. Run a check to catch common misspellings that autocorrect misses because the wrong word is still a real word.
- Social media — once a post is live, the typo is too. A 30-second check before hitting publish saves you from deleting and reposting.
- Cover letters — hiring managers read dozens of applications. A double word ("I I have") or misspelled company name stands out immediately and not in a good way.
- Customer service replies — tone and spelling both matter in customer-facing writing. Errors erode trust in your brand.
What This Checker Detects
- Common typos — over 40 frequently misspelled words including teh, recieve, definately, seperate, becuase, and more.
- Repeated consecutive words — catches "the the", "is is", "and and" and any word accidentally typed twice.
- Missing capital letters — flags sentences that start with a lowercase letter after a period, exclamation mark, or question mark.
- Missing space after punctuation — catches "Hello,world" and "Wait.Then" where a space was accidentally omitted.
- Double spaces — flags anywhere two or more consecutive spaces appear in the text.
- Repeated punctuation — flags "!!" and "??" where a single mark was the intent.
The Limits of Rule-Based Grammar Checkers
This tool is excellent at finding mechanical errors — typos, spacing, capitalization, punctuation. It cannot detect complex grammatical issues like subject-verb disagreement, wrong tense, dangling modifiers, or sentences that are grammatically correct but unclear. For those issues, read your text aloud or ask a colleague to proofread.
Use this tool alongside the word counter to check both the length and the correctness of your writing before you send.
Frequently Asked Questions
Yes, completely free. No signup, no account, no word limits. Paste your text and click Check Grammar. All analysis runs locally in JavaScript — your text never leaves your browser.
This tool detects common spelling typos (over 40), repeated consecutive words, missing capital letters after sentence-ending punctuation, missing spaces after commas and other punctuation marks, double spaces, and repeated punctuation marks like "!!" or "??".
Rule-based checkers are very reliable for mechanical errors — typos, double words, missing punctuation spacing, capitalization. They cannot detect complex issues like wrong tense, misplaced modifiers, or sentences that read awkwardly. Use it as a quick sanity check before proofreading manually.
The best free grammar checker depends on your needs. For fast mechanical checks — typos, spacing, capitalization — a rule-based tool like this one is instant and private. For deeper grammar analysis involving sentence structure and style, AI-based tools offer broader coverage but typically require an account.