Free Grammar Checker
Instantly detect and fix grammar slips, spelling mistakes, and punctuation errors.
📋 Quick Guide
- Type or paste your text into the text box below.
- Click Check Grammar to scan your text.
- Review highlighted issues or click Apply All Fixes to update automatically.
How This Grammar Checker Works
Our online grammar checking engine scans your writing against core grammatical rules, standard American/British spelling dictionaries, and typography spacing standards. It identifies subject-verb agreements, irregular past tense verbs, redundant apostrophes, and common homophone mix-ups.
Common Categories We Check
1. Homophones & Misused Words: Catches common mix-ups like their/there/they're, your/you're, and its/it's.
2. Irregular Past Tense: Flags improper verbs like buyed (bought), teached (taught), and runned (ran).
3. Spacing & Punctuation: Cleans up double periods, unnecessary spaces before commas, and missing spaces after punctuation marks.
Frequently Asked Questions (FAQs)
Is my writing private and secure?
Yes. The tool runs purely on JavaScript inside your local web browser. Your confidential writing never leaves your device.
Can I use this grammar tool for essays and articles?
Yes. You can paste blogs, emails, assignments, or resumes to spot obvious spelling errors and punctuation flaws before publishing.
Is there a word limit?
There are no hard limits. However, for maximum browser speed and performance, we recommend checking up to 3,000 words per scan.
How to Use the Free Online Grammar Checker
Step 1 — Input Content: Paste your drafted text directly into the text editor or type straight into the field.
Step 2 — Run the Diagnostic: Click Check Grammar to analyze syntax patterns, spelling rules, and punctuation spacing.
Step 3 — Inspect Error Highlights: Review color-coded alerts categorized into grammar, spelling, and punctuation.
Step 4 — Apply or Export Fixes: Click Apply All Fixes to update your text automatically, or copy the refined draft directly to your clipboard.
Core Grammar & Writing Checks Performed
Subject-Verb & Tense Agreement: Identifies conflicting verb forms, past-tense irregularities (such as teached or buyed), and improper subject pairing.
Homophone & Contraction Accuracy: Flags commonly confused phonetic matches, including their/there/they’re, your/you’re, and missing apostrophes in contractions (dont, cant, isnt).
Typographical Punctuation Rules: Automatically detects spacing defects, such as missing whitespace after commas/periods or accidental spaces placed prior to punctuation marks.
Readability Index Scoring: Provides a dynamic rating from 0 to 100 based on total error density relative to overall word count.
Common Error Comparison Guide
| Error Category | Incorrect Usage | Corrected Standard | Grammatical Rule Applied |
| Homophones | “Their going to the meeting.” | “They’re going to the meeting.” | Use They’re as the contraction for they are. |
| Possessive vs Contraction | “Check you’re inbox.” | “Check your inbox.” | Use Your to denote possession. |
| Past Tense Verbs | “She buyed a car yesterday.” | “She bought a car yesterday.” | Irregular past tense of buy is bought. |
| Punctuation Spacing | “Wait , what happened ?” | “Wait, what happened?” | Remove spaces preceding commas and question marks. |
Frequently Asked Questions
Does this grammar checker store or process private text on external servers?
No. All scanning and regular expression checks execute client-side via JavaScript directly inside your browser. No paragraphs, emails, or credentials are transmitted or logged externally.
How does the Readability Score get calculated?
The readability engine evaluates the total number of flagged errors against the overall word count in your text. As you eliminate highlighted mistakes, the score moves closer to 100.
Can I run long essays and multi-page reports through this tool?
Yes. While the tool accepts extensive documents, scanning sections of up to 3,000 words per check ensures maximum performance and real-time responsiveness in your web browser.
Are suggestions applied automatically?
No changes occur until you choose. You can manually inspect each flagged issue or click Apply All Fixes to update everything simultaneously.