Top 10 AI Grammar Checkers Free in 2026 (Better Than Spell Check)
AI Grammar Checking Goes Beyond Spell Check
Modern AI grammar checkers don’t just fix typos. They detect tone issues, passive voice, wordiness, clarity problems, and even suggest complete rewrites. Many offer powerful free tiers that rival paid tools from a few years ago.
The Top 10 Free Grammar Checkers
| # | Tool | Free Features | Platform | Premium Price |
|---|---|---|---|---|
| 1 | Grammarly | Grammar, spelling, punctuation | Browser, desktop, mobile | $12/mo |
| 2 | LanguageTool | Grammar + style, 30+ languages | Browser, desktop | $5/mo |
| 3 | ProWritingAid | Limited checks (500 words) | Browser, desktop | $10/mo |
| 4 | Hemingway Editor | Readability (unlimited) | Web | $19.99 one-time |
| 5 | QuillBot | Grammar + paraphrasing | Web, Chrome | $10/mo |
| 6 | Google Docs Spelling | Built-in grammar | Google Docs | Free |
| 7 | Microsoft Editor | Grammar in Office | Office, Edge | Included in 365 |
| 8 | Ginger | Basic grammar | Browser | $14/mo |
| 9 | Sapling | AI grammar for teams | Browser | $25/mo |
| 10 | Writer.com | Team style guide + grammar | Browser, desktop | $18/mo |
1. Grammarly — Best Overall Free Grammar Checker
Grammarly’s free tier catches more grammar errors than most paid alternatives. It works in every text field via browser extension, checks grammar, spelling, and punctuation, and provides basic tone detection. The free version handles 90% of grammar needs.
2. LanguageTool — Best Multilingual
LanguageTool supports 30+ languages for grammar checking, making it the best choice for multilingual writers. The free tier is generous with style suggestions included. At $5/month for premium, it is the most affordable advanced grammar checker.
3. ProWritingAid — Best for Writers
ProWritingAid offers the deepest writing analysis: readability, sentence structure, sticky sentences, overused words, pacing, and dialogue. The free tier limits to 500 words at a time. Essential for fiction writers and content creators.
The Free Stack
Grammarly Free (grammar everywhere) + Hemingway (readability) + Google Docs (built-in checking) = comprehensive writing improvement at zero cost.
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