AI Grammar Checker
Fix grammar, spelling and punctuation instantly.
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Sign in — it's freeAbout this tool
A grammar checker earns its place by being fast and unobtrusive. This one corrects grammar, spelling and punctuation while leaving your voice alone, and lets you pick the English variant so British and American conventions are not silently mixed.
The variant control matters more than people expect. Inconsistent spelling across a website — organisation next to organization — reads as carelessness to attentive readers and creates avoidable noise in edited copy.
Who this tool is best for
- Non-native English writers who want correctness without rewriting
- Anyone sending high-stakes email, proposals or applications
- Teams standardising on one English variant
- Students proofreading before submission
Real use cases
Final pass before sending
The last check on an email or proposal where a typo undermines credibility.
Normalising variant spelling
Paste a page of site copy and set the variant to catch mixed conventions in one pass.
Learning from corrections
Compare input and output to spot the mistakes you repeat. Recurring errors are habits, and habits are fixable.
How to use it
- 1Paste clean textStrip formatting artefacts that create false errors.
- 2Set the variant explicitlyDo not assume a default matches your audience.
- 3Review changes rather than accepting wholesaleDeliberate stylistic choices sometimes look like errors.
A practical example
Example input
"Their going to review the proposal tomorrow, however its not clear who's attending the meeting."
What you get back
"They're going to review the proposal tomorrow; however, it's not clear who is attending the meeting."
Three separate fixes: the homophone, the comma splice before "however", and the possessive/contraction confusion.
Why use this instead of doing it manually
Proofreading your own work fails predictably — you read the sentence you intended. A second pass by a checker catches the mechanical errors so your own attention can go to argument and structure.
When you should not use this tool
- For creative writing where the "errors" are deliberate voice.
- For code, formulas or structured data, which the checker will treat as prose.
- As a final sign-off on high-stakes published copy — a human still reads it last.
Common mistakes
- Accepting every change without reading them, which quietly standardises regional spelling.
- Running mixed-language text through in one pass.
- Assuming a clean result means the argument is clear; grammar and clarity are different problems.
What happens to the text you submit
Nothing is processed in your browser. When you press generate, the text you typed is sent to our server, which forwards it to the AI model that powers this tool and streams the result back to this page.
Your text is sent to the model provider for correction and is not compared against any plagiarism database. Nothing is stored unless you are signed in and the run is saved to your history.
This utility is free to use with no credit card required, and fair-use rate limits may apply so the tools stay available for everyone. Please avoid submitting confidential or sensitive information. Full details are in our privacy policy.
Tips from our editors
- Correct grammar is not the same as clear writing — check sentence length separately.
- For technical content, verify that jargon and product names were not "corrected".
- Run it after editing for content, not before; otherwise you proofread text you will delete.
Limitations to know
- It checks language, not facts.
- Very long inputs are better split into sections.
- Highly stylised or poetic writing may be normalised in ways you do not want.
Pricing and access
This tool is free to use on AI Vision Hub with no account, no trial and no credit card. We cover the model costs and fund the site through advertising, so there is no per-use charge and no export paywall. Fair-use rate limits apply to keep it available for everyone.
Alternatives worth considering
Grammarly / LanguageTool
Browser and app integration so corrections happen where you write. Free tiers exist; deeper suggestions are paid.
Built-in editors
Word and Google Docs catch most basics with no extra tool at all.
Frequently asked questions
Is this as good as Grammarly?
For grammar, spelling and clarity the AI model performs comparably and also explains each correction. It does not run as a browser extension.
Does it support British English?
Yes — choose UK, US, Australian or Canadian English and spelling conventions are applied accordingly.
Is my text stored?
Only if you are signed in, and only in your own private history, which you can delete at any time.
Related tools & guides
Keep exploring
Compare full AI products in the AI tools directory, read hands-on guides on the blog, or try the AI content detection hub.