AI Grammar Checker — AI Tools — Zapit

AI Grammar Checker

Highlight and fix grammar, spelling and punctuation errors with one click.

Writing context

0 words
Check your writing for grammar, spelling, punctuation, and style errors with AI-powered inline detection — no account needed, completely free. Errors are highlighted directly in your text using colour-coded underlines, so you see exactly what needs fixing without guessing. Choose your writing context (General, Business, Academic, Creative, or Social Media) and the AI adjusts its rule set accordingly — strict for academic papers, lenient for creative fiction. Accept individual corrections with a full explanation, dismiss false positives, or click Fix All to apply every suggestion at once.

Key Features

Context-aware rule sets
Select from five writing contexts. Business mode flags contractions and passive voice. Academic mode enforces scholarly style with no informal language. Creative mode is lenient with intentional fragments. Social Media mode allows abbreviations and casual punctuation. Each context changes what the AI flags as an error.
Colour-coded inline highlights
Grammar errors appear in red, spelling mistakes in orange, punctuation issues in yellow, and style suggestions in blue. Hover any underlined word to see a quick tooltip with the suggested fix and reason — no need to scroll to a corrections panel.
Error type breakdown badge
The results header shows a live count by type: "2 Grammar · 1 Spelling · 1 Style". This gives you an instant overview of which error categories need attention before diving into individual corrections.
Accept or dismiss per correction
Expand any correction card to read a plain-English explanation of the rule, then accept the fix (which updates the highlighted text immediately) or dismiss it if you disagree. Each decision is tracked independently.
Fix All with one click
Accept all pending suggestions at once with the Fix All button. Corrections are applied in text order to prevent conflicts, and the live preview updates instantly so you can see the final result.
Copy fixed text
Copy the corrected version of your text to the clipboard at any point — before, during, or after accepting corrections. The copied text always reflects the current state of accepted fixes.

How to Use

  1. 1Choose the writing context that matches your text.
  2. 2Paste or type your text into the input area.
  3. 3Click "Check Grammar" and wait for the AI analysis.
  4. 4Review colour-coded underlines in the annotated text panel — hover for tooltips.
  5. 5Expand correction cards to read explanations, then Accept or Dismiss each one.
  6. 6Click "Fix All" to accept everything at once, then copy the fixed text.

Frequently Asked Questions