5,000+ grammar rules
Every fix, explained clearly
Grammar Checker · free to try
Every mistake found. Every fix explained.
Thousands of grammar, spelling, and punctuation rules run over your text in seconds — and every correction comes back as before → after with the reason in plain language.
Results in seconds100% free — unlimited useNo sign-up required
Your Text
0 / 3000 words
Corrected Text
Your result will appear here.
Turns stiff AI phrasing into words people actually use
In today's fast-paced worldThese daysIt is important to note thatNote thatleverage synergieswork togethera myriad of optionsplenty of optionsutilizeusedue to the fact thatbecausein order totofacilitatehelpfurthermorealsodelve intolook atIn today's fast-paced worldThese daysIt is important to note thatNote thatleverage synergieswork togethera myriad of optionsplenty of optionsutilizeusedue to the fact thatbecausein order totofacilitatehelpfurthermorealsodelve intolook at
Fixes that teach, not just patch
Autocorrect hides your mistakes; a good checker explains them. AI Humanizer Lab shows every correction side by side with the reason — a typo, a homophone mix-up, an article that doesn’t agree.
Under the hood it runs a production-grade rule engine with thousands of curated rules across dozens of languages, so the same paste works for an English essay and a Spanish email alike.
- Grammar, spelling, and punctuation in one pass
- Plain-language explanation for every correction
- Automatic language detection
- Keeps your voice — corrections never rewrite your style
aihumanizerlab.com — Grammar Checker
I think their going to recieve the results tomorrow, and the team is ready.
their → they’reContraction of “they are”
recieve → receivei before e except after c
5,000+curated grammar and style rules
~50languages checked automatically
<3sfor a full document pass
No setup required
Done in under a minute
How it works
1
Paste your writing
The language is detected automatically — no setup, no dropdowns.
2
Get an instant check
Thousands of grammar, spelling, and punctuation rules run over your text in seconds.
3
Apply the corrections
Every fix is shown as before → after with a plain-language explanation of the rule.
Trusted since day one
Used by 1M+ people worldwide
Why our AI Grammar Checker?
Accurate Grammar Correction
Fix grammar errors in essays, reports, and assignments.
Better Sentence Structure
Refine your writing to sound polished and natural.
1M+ Users Worldwide
Trusted by students, researchers, and professionals across the globe.
50+ Languages Supported
Designed for global use across countries and institutions.
100% free
Every tool, no limits — no card, no sign-up.
Built for how you write
Whatever you're working on, get to a polished result faster.
Students
Hand in essays and reports without losing marks to typos.
Professionals
Send emails and documents that read clean and confident.
Non-native speakers
Learn from every correction with clear explanations.
Loved by users worldwide
“It turns my rough drafts into writing that actually sounds like me. Huge time saver before deadlines.”
“The output reads naturally and keeps my meaning intact. My articles feel human again.”
“Fast, simple, and reliable. I use it for docs, updates, and everything in between.”
“It turns my rough drafts into writing that actually sounds like me. Huge time saver before deadlines.”
“The output reads naturally and keeps my meaning intact. My articles feel human again.”
“Fast, simple, and reliable. I use it for docs, updates, and everything in between.”
“My content ranks and reads better. The built-in detector gives me peace of mind.”
“Clean rewrites without losing tone. It has become part of my daily workflow.”
“Great value and it just works across languages. Clients can’t tell the difference.”
“My content ranks and reads better. The built-in detector gives me peace of mind.”
“Clean rewrites without losing tone. It has become part of my daily workflow.”
“Great value and it just works across languages. Clients can’t tell the difference.”
Frequently asked questions
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