I Made a Free AI Grammar Checker

Grammarly, ProWritingAid, Hemingway — great tools, but they all push you toward paid plans. I wanted something dead simple: paste text, get corrections, no signup.

So I built grammaraicheck.com.

Features

• Grammar & spell check — catches the usual suspects (their/there/they're, who/whom, affect/effect)
• Style suggestions — flags passive voice, wordy sentences, weak adverbs
• Text history — saves last 10 checks in localStorage, no account needed
• 24 writing guides — covers English word order, Flesch reading score, commonly confused words, and more

How It Works

1. Paste or type your text
2. Click "Check"
3. Get inline corrections and suggestions
4. Copy the fixed version

The AI backend handles grammar detection. The frontend is vanilla JS under 100KB.

Tech Choices

• Static HTML — no framework overhead
• localStorage for history (private by default — nothing leaves your browser until you click "Check")
• Cloudflare Pages for hosting

Why Another Grammar Tool?

Most free grammar checkers have a 500-word limit or require an account. I wanted something I could share with friends without saying "you'll need to sign up first."

Try it: grammaraicheck.com

Feedback welcome! What grammar rules do you wish free checkers handled better?