Free SEO Tool

Grammar Checker

Catch the mistakes that quietly hurt your writing and your credibility — homophone mix-ups, passive voice overuse, double spaces, and missing capitalisation. Everything runs in your browser, nothing is ever sent to a server.


Why does this tool flag passive voice instead of just fixing it?

Passive voice isn’t a grammar error — it’s a style choice that’s sometimes exactly right, especially when the action matters more than who did it. This tool flags passive sentences so you can decide whether an active rewrite would be clearer, rather than forcing a rule that doesn’t always apply.

Does this catch every grammar mistake?

No tool, including large AI-based checkers, catches every error. This tool focuses on the highest-frequency mistakes that quietly damage credibility: homophone confusion, double spaces, missing capitals, and passive overuse. For a final read-through before publishing something important, pairing this with a human proofread is still the safest combination.

Frequently Asked Questions

What grammar mistakes does this tool catch?
It catches the most common, highest-impact writing errors: confused homophones (their/there/they’re, your/you’re, its/it’s, then/than, affect/effect), double spaces, missing capitalisation after a period, passive voice patterns, repeated consecutive words, and overly long sentences that are hard to follow.
Is passive voice always a mistake?
No. Passive voice is a legitimate stylistic choice, particularly when the action itself matters more than who performed it, or in scientific and formal writing. This tool flags passive sentences as something worth reviewing, not as an automatic error to fix.
Does this tool store or send my content anywhere?
No. Every check runs directly in your browser using JavaScript. Your text is never transmitted to a server, stored, or seen by anyone. Closing or refreshing the page clears it completely.
Why do their/there/they’re mistakes matter for a website?
Beyond basic credibility, Google’s E-E-A-T guidelines associate polished, error-free writing with genuine expertise and trustworthiness. A page riddled with homophone errors signals lower quality to both human readers and increasingly to AI systems evaluating content for citation.

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