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Grammar Checker

Paste text or upload a PDF or Word (DOCX) document to check grammar, spelling, expression, and clarity.

Bring your draft in the format you have

Text

Paste a sentence, paragraph, or draft directly into the editor.

PDF

Import text from a PDF. Check the reading order before running the analysis.

Word / DOCX

Upload a DOCX draft to bring its text into the editor.

Document uploads import text for checking; they do not edit the original file layout.

See your grammar check results in context

View flagged passages alongside categorized findings, so you can see what needs attention and where it appears.

Student grammar report: 104 words reviewed; one expression concern highlights ‘portable interactive terminals.’ No grammar, spelling, or clarity issues were flagged in this recorded review.
In this student draft, Revisy.ai flagged “portable interactive terminals” as an expression concern. Recorded September 14, 2026; account details and unrelated interface areas have been removed.

What does our Grammar Checker check?

Check your writing for grammar, spelling, expression, and clarity, with findings organized into four categories.

Grammar

Find flagged issues in sentence structure and grammatical usage, then review them in the original passage.

Spelling

Locate spelling concerns in your draft so you know which words to check.

Expression

Identify wording that may not fit your context or audience, as shown in the student example.

Clarity

Find passages flagged as difficult to follow and consider how to make your meaning clearer.

How to check grammar online with Revisy.ai

Check grammar
  1. 01

    Add your text

    Paste your writing or upload a PDF or DOCX document.

  2. 02

    Run a grammar check

    Click “Check grammar” to analyze your text.

  3. 03

    Review your results

    Subscribe to view the results. Read the flagged passages and suggestions, then revise where needed.

Grammar checking for academic and editorial writing

Students
Check grammar in college essays, course assignments, and application drafts before submission.
Educators
Review grammar and wording in lesson plans, assignment instructions, and student feedback.
Researchers
Check language in abstracts, manuscript sections, and research summaries before review.
Editors
Review grammar and wording in articles, reports, and manuscripts during proofreading.

Grammar Checker FAQs

Grammar and writing guides

Explore practical explanations and examples to help you understand grammar corrections and make informed writing choices.

Grammar basicsSample guide

Subject–verb agreement: rules and examples

Learn how to match verbs with singular and plural subjects, even when other words come between them.

Sentence structureSample guide

Sentence fragments and run-on sentences

Recognize incomplete sentences and learn how to connect independent clauses correctly.

Writing decisionsSample guide

Grammar correction vs. paraphrasing

Understand when a sentence needs an error corrected and when you are choosing a different way to express an idea.

Ready to check your grammar?

Paste your text or upload a PDF or DOCX document to get started.

Run a check for free. Subscribe to view the results.

Check grammar