Notepad Online Pro
Grammar Check

Free Online Notepad with Grammar Checker

Write and check grammar in one place. The built-in grammar panel catches double words, passive voice, missing capitals, extra spaces, and weak words — instantly, without leaving your notepad.

Open Notepad with Grammar Check

What the Grammar Checker Detects

Grammar

— likely errors to fix
🔴

Repeated Words

Example: "the the document is ready"

Suggestion: Removes duplicate word

🔴

Missing Capital Letter

Example: "end of sentence. next sentence"

Suggestion: Capitalize first letter

🔴

Double Spaces

Example: "word word word"

Suggestion: Collapse to single space

Recommendations

— style improvements
🟡

Passive Voice

Example: "The report was written by the team"

Suggestion: Rewrite in active voice

🟡

Weak Words

Example: "very good", "really important", "basically"

Suggestion: Use stronger, specific words

How to Use the Grammar Checker

01

Open Notepad Online Pro

Go to notepadonlinepro.com in any browser. No account, no download needed. The notepad opens immediately and your notes are preserved from previous sessions.

02

Write or Paste Your Text

Type your note, essay, email draft, or any writing directly in the editor. Or paste text from elsewhere. The rich text editor supports bold, italic, headings, and lists — your formatting is preserved while grammar checking.

03

Open the Grammar Panel (Tools → Grammar Check)

Click Tools in the menu bar, then click Grammar Check. The grammar panel slides open on the right side of the editor. Click the refresh (↻) button in the panel to run the grammar analysis on your full note.

04

Review Issues and Fix Your Writing

The panel shows each issue with its context and a suggestion. Grammar errors appear under the Grammar tab; style suggestions appear under Recommendations. Fix issues manually in the editor, then re-run the check. Click × next to any issue to dismiss it if you intentionally wrote it that way.

The Grammar Panel

All 3Grammar 2Recommendations 1↻
●

Repeated word: "the"

the the document is

Suggestion: the

✕
●

Sentence should start with a capital.

...sentence. next word...

Suggestion: N

✕
●

Weak word: "really"

really important

Suggestion: Consider a stronger word.

✕

Live preview of the Grammar panel in Notepad Online Pro

Why Use the Built-In Grammar Checker

No need to switch between tabs or copy-paste into a separate grammar tool. Check grammar right where you write.

Instant Analysis

The grammar panel scans your entire note in milliseconds. No waiting, no server calls — all processing happens in your browser.

Two Issue Types

Issues are split into Grammar (must fix) and Recommendations (style suggestions) so you can prioritize what matters most.

Suggestions Included

Each issue shows the problematic text, its context in your note, and a specific suggestion for how to fix it.

Re-check Any Time

Click the refresh button in the grammar panel to re-run the check after you've made edits. Dismissed issues reset on each re-check.

Works With All Notes

The grammar checker works on any note in your sidebar. Switch notes and run the check on each one independently.

Non-Destructive

Opening the grammar panel never changes your text. You choose which suggestions to act on — the panel only highlights, never edits.

Who Uses the Notepad Grammar Checker

🎓

Students

Proofread essays, assignments, and reports before submitting. Catch double words and missing capitals that spell-check misses.

✍️

Writers & Bloggers

Identify passive voice and weak words in drafts. Strengthen your writing style before publishing or sending to editors.

💼

Professionals

Check emails, proposals, and meeting notes for grammar issues. Present polished writing every time, with no extra tools needed.

Frequently Asked Questions

Does the grammar checker run automatically?▾
The grammar checker runs when you open the panel (Tools → Grammar Check) and click the refresh button. It does not run continuously in the background, so it won't slow down your typing. Run it when you're ready to review your writing.
What grammar mistakes can the checker detect?▾
The built-in grammar checker detects: (1) Repeated/double words — e.g. "the the", "is is". (2) Missing capital letters after sentence-ending punctuation. (3) Double spaces between words. (4) Passive voice constructions — e.g. "was written", "is being done". (5) Weak and vague words — "very", "really", "basically", "literally", "actually", "maybe", "quite", "just".
Is the grammar checker completely free?▾
Yes. The grammar checker is a built-in feature of Notepad Online Pro and is 100% free. No subscription, no trial period, no credit card. All grammar and recommendation checks are included at no cost.
Does it check spelling too?▾
Spell checking is handled by your browser's native spell checker (enabled by default in Chrome, Firefox, and Edge). The built-in grammar panel in Notepad Online Pro focuses on grammar patterns and writing style — double words, passive voice, weak words, and capitalization — beyond what browser spell check covers.
How do I open the grammar checker panel?▾
Click the Tools menu in the menu bar, then click Grammar Check. The grammar panel opens on the right side of the editor. Click Tools → Hide Grammar Panel (or the same button) to close it. The panel does not affect your note content.
Can I ignore grammar suggestions I disagree with?▾
Yes. Each issue in the grammar panel has a × dismiss button. Click it to remove that suggestion from the list without changing your text. The issue will not reappear until you run the grammar check again.
What is the difference between Grammar and Recommendations?▾
Grammar issues (shown with a red icon) are likely errors — double words, missing capitals, extra spaces. Recommendations (shown with a yellow icon) are style suggestions — passive voice and weak words. You can filter by category using the tabs at the top of the grammar panel.
Does the grammar checker work on long documents?▾
Yes. The grammar checker runs on the full text content of your note, regardless of length. For very long notes, click the refresh button in the grammar panel to re-run the check after making edits.

Check Your Grammar Right Now — Free

Open the notepad, write your content, and run Grammar Check from the Tools menu. No sign-up required.

Open Notepad with Grammar Checker →

Related Features

Rich Text Editor

Bold, italic, headings & colors

Auto-Save & Backup

Never lose your notes

Keyboard Shortcuts

Edit faster with hotkeys

How It Works

Full guide to every feature