Free Grammar Checker
Paste your text below and get instant AI-powered grammar corrections. Free, no signup required.
Want grammar checking in every Mac app?
FlowWrite lives in your menu bar. Select any text in any app, press Tab, and get instant corrections. No copy-paste, no switching windows.
How Our Grammar Checker Works
FlowWrite's grammar checker uses advanced AI to analyze your text for grammar errors, spelling mistakes, punctuation issues, and style improvements. Unlike rule-based checkers, our AI understands context — so it catches errors that traditional tools miss.
What We Check
- Grammar errors — subject-verb agreement, tense consistency, article usage
- Spelling mistakes — common misspellings and typos
- Punctuation — commas, semicolons, apostrophes, quotation marks
- Style improvements — wordiness, passive voice, clarity
- Word choice — commonly confused words (affect/effect, their/there/they're)
Free vs Mac App
This online grammar checker is free with a 500-character limit and 3 checks per day. For unlimited grammar checking that works in every Mac app — Mail, Slack, VS Code, Notes, browsers, and more — download the FlowWrite Mac app. It's free with 10 corrections per day.
Frequently Asked Questions
Is this grammar checker really free?
Yes. The online grammar checker is completely free with no signup required — 3 checks per day, up to 500 characters each. The Mac app also has a free tier with 10 corrections per day.
Is my text stored or shared?
No. Your text is sent to our AI for correction and immediately discarded. We never store, log, or use your text for any purpose.
What languages are supported?
The grammar checker supports all major languages including English, Spanish, French, German, Portuguese, Chinese, Japanese, Korean, and more.