AI-Powered Grammar and Proofreading

Find and Fix Every Grammar, Spelling, and Punctuation Error

Paste any text and get a fully corrected version with every change listed and explained, supporting American, British, Australian, and Canadian English.

Check Grammar

Professional writer reviewing and editing a document at a bright modern desk

Grammar Checker

Paste any text and get grammar, spelling, punctuation, and style corrections with clear explanations for every change.

Text to Check0 / 10,000

English Variant

Formality

Cost per analysis

Results

Grammar Checker

✍️

Grammar Checker

Paste your text on the left and click the button to see the results.

Corrected version of your full text
Every change listed with explanation
Grammar, spelling, punctuation, and style
American, British, Australian, and Canadian English
Casual, standard, formal, and academic formality levels

Editor reviewing a marked-up document with corrections and explanations annotated in the margins

Every Change Explained

Check Your Writing

Every Change Explained

Unlike simple spell-checkers, every correction is accompanied by a clear explanation of what was wrong and why it was changed. Grammar errors, spelling mistakes, punctuation issues, style suggestions, and word choice improvements are all categorized and labeled so you understand the rule behind each fix.

Check Your Writing

Writer selecting the correct English variant for an international document on a laptop

Four English Variants

Try Your English Variant

Four English Variants

Choose between American, British, Australian, or Canadian English to ensure spelling conventions, vocabulary choices, and punctuation rules match the correct standard for your audience. "Colour" vs "color," "realise" vs "realize," and "programme" vs "program" are handled correctly for each variant.

Try Your English Variant

Student proofreading an academic essay on a laptop in a study room

Formality-Aware Corrections

Match Your Formality Level

Formality-Aware Corrections

Select casual, standard, formal, or academic formality so corrections match the context of your writing. A casual email and an academic paper follow different rules. Contractions, sentence fragments, passive voice, and informal vocabulary are all evaluated against the formality level you set.

Match Your Formality Level

How It Works

How to Check Grammar with AI

Paste Your Text

Paste any text up to 10,000 characters. Works with emails, essays, articles, cover letters, social posts, reports, and any other written content.

Choose Your Settings

Select your English variant (American, British, Australian, or Canadian) and the formality level that matches your writing context.

Get the Corrected Text

Receive a fully corrected version of your text, a list of every change with explanations, and an overall quality summary.

Check Grammar

Who Uses It

Student proofreading an academic paper on a laptop before submitting it

Use Case

Students and Academics

Proofread essays, research papers, and dissertations before submission. Academic formality mode applies strict grammar and style standards appropriate for scholarly writing.

Business professional proofreading a report on a laptop at a modern office desk

Use Case

Professionals and Business Writers

Polish emails, reports, proposals, and presentations before sending. Formal and standard modes ensure professional tone and accurate grammar in client-facing documents.

Content creator checking a blog post for grammar errors on a laptop at a home desk

Use Case

Content Creators and Bloggers

Clean up articles, blog posts, and social media captions before publishing. Casual mode keeps your voice natural while still catching errors that undermine credibility.

Non-native English speaker reviewing grammar corrections and explanations on a laptop

Use Case

Non-Native English Writers

Get clear explanations for every correction to understand the grammar rules behind each change. Choose the English variant that matches your target audience or publication.

Check Grammar

Deep Dive

The Four Types of Writing Errors

Grammar checking covers four distinct categories of errors, each with different causes and different impacts on how your writing is perceived. Understanding the difference helps you focus on the corrections that matter most for your specific context.

Editor reviewing and annotating a document with grammar and style corrections at a professional desk

Grammar vs Spelling vs Punctuation

These three are often grouped together but they are distinct error types that affect different aspects of your writing. Grammar errors are structural problems with how sentences are built: subject-verb disagreement, incorrect tense usage, dangling modifiers, or sentence fragments. Spelling errors are incorrect word forms that change or obscure meaning. Punctuation errors affect how sentences are read and how meaning is divided: missing commas, incorrect apostrophe usage, run-on sentences, and comma splices. Each type has a different impact on readability and each requires a different rule set to correct.

Grammar"They was going to the store" should be "They were going to the store" (subject-verb agreement)

Spelling"Recieve" should be "Receive" (i before e rule)

Punctuation"Its raining" should be "It's raining" (apostrophe for contraction vs possessive)

Grammar errors are the most impactful on professional credibility. Spelling errors are the most immediately visible. Punctuation errors are the most commonly misunderstood.

Style vs Correctness

Not every grammar suggestion is a correction of an error. Some suggestions are style improvements: replacing passive voice with active voice, simplifying overly complex sentences, replacing weak or vague words with more precise alternatives, or reducing redundant phrasing. Style suggestions improve clarity and readability but are often a matter of context and preference rather than strict rules. A formal academic paper benefits from different style guidance than a casual blog post. The formality setting in the grammar checker ensures style suggestions are appropriate for your specific writing context.

Error (must fix)"The report were submitted yesterday" — grammatically incorrect regardless of context

Style (context-dependent)"The report was submitted by the team" — passive voice, fine in formal writing but often improved to "The team submitted the report"

Formality noteCasual writing allows fragments, contractions, and conversational language that would be flagged in academic mode

Style suggestions are labeled separately from grammar and spelling errors in the output so you can choose which ones to accept based on your context and voice.

Why English Variant Matters

British, American, Australian, and Canadian English have genuine differences in spelling, vocabulary, and punctuation conventions that are not errors but standards specific to each variant. Using the wrong variant for your audience can undermine credibility even when the writing is otherwise correct. "Analyse" is correct in British English and incorrect in American English. "Realise" vs "Realize," "Honour" vs "Honor," "Programme" vs "Program," and "Centre" vs "Center" are all variant-specific spellings. Punctuation conventions also differ: British English places punctuation outside quotation marks in many cases where American English places it inside.

Americancolor, realize, analyze, organization, program, center

Britishcolour, realise, analyse, organisation, programme, centre

PunctuationAmerican: "He said, \"hello.\"" vs British: He said, "hello".

Select the variant that matches your intended audience or publication, not necessarily where you are based. An Australian writer publishing for an American audience should use American English settings.

Note: AI grammar checking is highly accurate for standard English writing. Always review corrections in context before accepting all suggestions.

Benefits

Why Use It

✍️

Every Change Explained

Unlike basic spell-checkers, every correction comes with a clear explanation of the rule behind it so you understand what was wrong.

🌍

Four English Variants

American, British, Australian, and Canadian English spelling conventions and punctuation rules are all supported.

🎓

Formality-Aware

Casual, standard, formal, and academic modes ensure corrections match the context of your writing rather than applying a one-size-fits-all standard.

📋

Full Corrected Text

Get a complete corrected version of your text ready to copy, not just a list of issues to fix manually.

Related Tools

Frequently Asked Questions

How does the AI Grammar Checker work?

You paste your text, select an English variant and formality level, and the AI checks for grammar, spelling, punctuation, and style issues. It returns a fully corrected version of your text with every change listed and explained, plus an overall quality summary.

What types of errors does it check?

The tool checks grammar (subject-verb agreement, tense, sentence structure), spelling, punctuation (commas, apostrophes, semicolons, quotation marks), style (passive voice, wordiness, clarity), and word choice. Each correction is labeled by type.

What is the maximum text length?

The tool supports up to 10,000 characters per check. For longer documents, split them into sections and check each one separately.

Which English variants are supported?

American English, British English, Australian English, and Canadian English are all supported. Each variant applies the correct spelling conventions, vocabulary choices, and punctuation standards for that variety.

What do the formality levels do?

Formality levels determine which style rules are applied. Casual mode allows contractions, conversational phrasing, and informal language. Standard covers everyday professional writing. Formal applies strict grammar conventions for business and legal writing. Academic applies scholarly writing standards including passive voice guidance, citation-appropriate language, and formal vocabulary.

Will it change my writing style?

The tool corrects errors and flags style suggestions, but style suggestions are labeled separately so you can choose which ones to apply. Grammar and spelling errors are more definitive corrections. The output preserves your voice while fixing genuine errors.

Can I use it for non-English text?

The tool is optimized for English in its four major variants. For other languages, results may be inconsistent or inaccurate.

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Check Your Grammar Instantly

Sign up free and get 100 credits instantly. Paste any text and get grammar, spelling, and punctuation corrections with explanations in seconds.

Disclaimer: This tool uses generative AI technology which may produce content that resembles copyrighted materials or that is inaccurate, incomplete, or out-of-date. It is provided for general information and educational purposes only and is not intended for illegal activities or to replace professional advice, diagnosis, or treatment. Users are solely responsible for how they use the generated content. If you plan to use AI-generated content commercially or publicly, we strongly recommend reviewing it for potential copyright issues and obtaining proper permissions where necessary. We accept no liability for copyright infringement or any other consequences resulting from the use of content generated by this tool.