Grammar Checker

Paste your text in Rext AI grammar checker and see exactly where the grammar breaks down, with a corrected version sitting right next to your original. Catch the mistakes before your reader does.

Enter Your Content

Grammar Checking Tips

•Enter complete sentences or paragraphs for more accurate grammar analysis.
•Review the suggested corrections before applying them to your content.
•Use clear and concise language to improve readability and understanding.
•Always review the corrected text to ensure it matches your intended meaning.

The basics

What is a Grammar Checker?

Why A Grammar Checker Matters

Here's the thing most people get backwards about grammar mistakes: they rarely come from not knowing the rule. They come from writing faster than you can proofread, or from editing a sentence halfway through and leaving a fragment of the old version behind. You wrote "the team were reviewing" and then changed "team" to "manager" without updating "were" to "was." You knew the rule. Your fingers just didn't catch up with your revision.

What A Grammar Checker Does

A grammar checker reads your writing and flags the places where it breaks the conventions of standard English, like subject-verb disagreement, misplaced modifiers, comma splices, wrong verb tense, the usual suspects. It doesn't just spell-check; instead, it looks at how your sentences are built and whether they hold together.

What Rext AI Provides

For non-native English writers specifically, a grammar checker fills a different gap. Certain error patterns, like article usage or preposition choice, are genuinely difficult to internalise from grammar rules alone because English is inconsistent about them. A tool built by Rext AI that flags the specific pattern, repeatedly over time, teaches it faster than any textbook chapter on the subject.

How it works

How to Use the Grammar Checker

Generate your outline

1
Paste in complete thoughts, not fragments
The checker needs sentence structure to evaluate sentence structure; a string of keywords or bullet fragments won't trigger much useful analysis. Full paragraphs work best.
2
Read every flagged issue before accepting anything
Grammar tools occasionally misread intentional style choices, like a sentence fragment used for emphasis, as errors. A quick read-through takes seconds and prevents you from losing a deliberate choice.
3
Pay attention to the "why," not just the "what"
The plain-language explanation next to each flag is there so you learn the pattern, not just fix this one instance. If you keep seeing the same flag across different pieces, that's worth remembering for next time.
4
Check that corrections haven't changed your meaning
Grammatically correct isn't always what you meant; read the corrected version with your original intent in mind.
5
Do a final read-aloud pass yourself
Even after every flag is resolved, read the corrected text aloud. Grammar checkers catch structural errors; they don't catch clunky rhythm, which your ear picks up far better than any tool.

Examples

Grammar Checker Examples

01 Example 1

Features

Key Features and Capabilities

Plain-language explanations

Each flag tells you the issue type, original text, and suggested correction without burying you in grammatical terminology.

Punctuation and style coverage

Beyond core grammar, it catches comma misuse, run-ons, redundant phrasing, and awkward constructions.

Category summary

A quick count of issues by type, so you can judge the state of a draft before diving into the detail.

No word limit that blocks you

Full articles process in one pass, no need to check a paragraph at a time.

Free and unauthenticated

No account, no card, no cap on how many times you run it.

Direct handoff to Rext AI

Copy and paste that corrected text into different seo tools for getting different technical results.

FAQ

Yes, Rext AI provides a free plan without any limit on how many times you use it, and no account is required.

Yes, spelling errors are caught alongside grammar and punctuation issues in the same pass and marked issues below.

Occasionally, since a tool can't always tell deliberate style from a genuine mistake. That's why every suggestion needs your review rather than automatic acceptance.

Full-length articles are fine, but extremely long documents, well beyond a typical blog post, may take slightly longer to process but won't be rejected.

Keep going

Related Tools

Readability Checker

After checking grammar, check how easy your corrected text is to read with Rext AI readability checker.

Try it free

Generate Questions

If you need questions for adding in content, you don't need to go anywhere and do a long research; Rext AI question generator provides you with the best questions.