ByteCheck

Serverless grammar highlighter for any text box. Local-only. No storage. No network.

ByteCheck – Private, Offline Grammar and Spell Checker ByteCheck is a lightweight, privacy-first grammar and spell highlighter that runs entirely on your computer — no servers, no tracking, no data collection. It automatically scans text boxes and highlights potential grammar or spelling issues as you type, working offline in real time. ByteCheck never sends your words anywhere — all processing happens locally inside your browser. ✨ Features Detects grammar and spelling issues instantly Works automatically in any website text box (Google Docs, Gmail, chat boxes, etc.) Powered by a built-in 4,800-word U.S. English dictionary (works offline) No internet connection required — everything runs locally Zero data collection, zero tracking, zero cloud calls Lightweight and fast — under 1 MB in size 🔒 Privacy ByteCheck processes everything on-device. Your text never leaves your browser — no servers, no analytics, no logs, and no accounts. It’s grammar and spell checking designed for true privacy. 💡 How to Use Install the extension. Open any page with a text box. Start typing — ByteCheck will highlight grammar and spelling issues automatically. 🧩 Perfect For Writers, students, editors, teachers, developers, and professionals who need fast, accurate grammar feedback without sacrificing privacy or speed. Serverless. Local-only. Private by design. Powered by a 4,800-word offline dictionary.