Proofmark - Grammar & Spelling Checker

Check grammar and spelling in any text box with one shortcut. Fix mistakes in many languages. No account needed.

✍️ Proofmark Typo in an email you already sent? A social post with "their" where "there" belongs? Proofmark checks your text before it goes out. Select some text or click in a text box, press Alt+G, and you get a list of the mistakes with a short reason for each. Click Apply on the fixes you want, or Apply all. It works in the language you write in: English, Portuguese, Spanish, French, German, Italian and many more. No account, no sign-up, and Proofmark never runs in the background. 📋 How it works 1. Write in any text box: email, social post, form, chat, comment or document. 2. Press Alt+G, or right-click and choose "Check with Proofmark". 3. Review the list. Each fix shows the old words, the new words and why. 4. Click Apply on a fix, or Apply all. Ctrl+Z undoes it like normal typing. Example: "thanks for you're email, I will send it tomorow" becomes "thanks for your email, I will send it tomorrow", with two fixes you can accept one by one. ⚡ Features 🔤 Spelling, grammar, punctuation and missing accents 🌍 Checks text in the language it is written in, keeping US or UK spelling and other regional variants 🎯 Select part of a text to check only that part ✅ Apply fixes one at a time or all at once, without losing bold, links or other formatting ↩️ Undo any fix with Ctrl+Z 📋 Text you can't edit on a web page? Copy the corrected version instead ⌨️ Works with Alt+G, the right-click menu or the toolbar button 🧘 Only flags real mistakes. Your style and word choices stay yours. 🎯 Single purpose: Proofmark checks the spelling and grammar of text you choose and lets you apply the fixes. 💰 Pricing Free: 20 checks a day, up to 5,000 characters each. Proofmark Pro: - 500 checks a day - Texts up to 20,000 characters - Rewrite: make a text clearer, more formal, friendlier or shorter, in one click - Monthly: $5/month - Yearly: $50/year (two months free) Payments are handled by Stripe on a secure page outside the extension. 🌟 Popular ways to use it - Work email: check a reply before sending it to a client. - Social posts: catch the typo before your network does. - Writing in a second language: see what to fix and why, in plain words. - Support and sales teams: keep messages clean across many tools. - Forms and applications: proofread before you submit. 🔒 Privacy Proofmark only reads text when you ask it to, and only the text you selected or the text box you are in. That text is sent over an encrypted connection to our server, which uses OpenAI's API to find mistakes and returns the result. We don't store your text or write it to logs, and OpenAI does not use API data to train its models. Don't check passwords or payment details. We send a few anonymous usage counts (for example "a check was run") with no text or page addresses, and you can turn them off in the popup. We never sell or share data. GDPR and LGPD requests: support@chpx.io. Privacy policy: https://proofmark.chpx.app/privacy.html