What grammar rules does this check?

Double spaces, missing capitalization after a period, common confusables (their/there, its/it's, your/you're, then/than), passive voice patterns, very long sentences (over 40 words), and missing spaces after commas or periods.

Is this as powerful as Grammarly?

No. This is a fast, rule-based browser tool. It catches the most common errors but does not use AI or NLP. For complex grammar, use a dedicated grammar service.

Does it check for plagiarism?

No. This tool only checks for grammar issues. It does not compare your text against external sources.

Is my text stored anywhere?

No. All analysis runs in your browser. Nothing is sent to any server.

What grammar errors does this tool catch?

It catches double spaces, missing sentence-starting capitals, missing end punctuation, common confusables (their/there/they're, your/you're, its/it's, affect/effect), passive voice, and sentences over 40 words.

Does it check spelling too?

This tool focuses on grammar and style. For spelling, use the dedicated Spell Checker tool which flags misspelled words with correction suggestions.

Is my text sent to a server?

No. All grammar checking runs locally in your browser using JavaScript. Your text never leaves your device.

Does it work for languages other than English?

The grammar rules are English-specific. Results for other languages will not be meaningful.

Grammar Checker — Check & Fix Grammar Errors Free Online

Check for common grammar errors: double spaces, missing capitals, confusable words (their/there), passive voice, and long sentences. Free, browser-based.

Your text

Paste text above to start grammar checking.

100% Private

No Upload

Instant

What is Grammar Checker — Check Grammar Online Free?

A grammar checker scans your text for grammatical mistakes, style issues, and common writing errors — things like double spaces, missing sentence-ending punctuation, overused passive voice, confusable word pairs (their/there/they're, your/you're), and run-on sentences. Our tool runs entirely in your browser and highlights each issue with an explanation so you understand the fix, not just the flag.

How to Use Grammar Checker — Check Grammar Online Free

1Paste or type your text into the input area.
2Click Check Grammar to run the analysis.
3Review each highlighted issue and its explanation.
4Click a suggestion to apply the fix, or dismiss it.
5Copy the corrected text when all issues are resolved.

Key Features

Detects double spaces, missing capitals, and punctuation errors
Flags confusable word pairs (their/there, your/you're, its/it's)
Identifies passive voice constructions
Highlights overly long sentences
Runs 100% in your browser — text never leaves your device

Benefits

Catch grammar errors before publishing or submitting content
Write cleaner emails, documents, and blog posts
Understand why each issue is flagged — not just that it is
Free alternative to Grammarly for common grammar checks

Why Use Irreva for Grammar Checker — Check Grammar Online Free?

Catch grammar errors before publishing or submitting content

Write cleaner emails, documents, and blog posts

Understand why each issue is flagged — not just that it is

Runs 100% in your browser — files never leave your device.

No account, no sign-up, no subscription — free forever.

Works on any device: desktop, tablet, or mobile.

Frequently Asked Questions

More Text Tools

Anagram Generator Capitalize Text Case Converter Character Counter Citation Generator Duplicate Line Remover