editGPT

editGPT is a browser extension and web app that layers a Word-style proofreading workflow on top of ChatGPT. Instead of pasting text into ChatGPT and getting a rewritten blob back, you get inline track changes, suggested edits, and a side-by-side diff you can accept or reject one revision at a time. It runs as a Chrome/Edge extension that injects into ChatGPT's interface (and into Google Docs and the WordPress editor on supported tiers), so the editing happens where you're already writing.

The sell is workflow, not model quality: editGPT outsources the LLM to whichever ChatGPT account you already pay for, and concentrates on the editorial UX that ChatGPT itself doesn't ship, namely revision marks, change history, and tone/style presets (academic, business, casual). That makes it most useful for non-native English writers, students polishing essays, and copy editors who want a reviewable diff rather than a black-box rewrite. There's a free tier for basic proofreading and a paid plan that unlocks longer documents, more style modes, and the Google Docs / Word integrations.

The catch is that editGPT is a thin wrapper around ChatGPT, so it inherits ChatGPT's hallucination habits and rate limits, and it stops being useful the moment OpenAI ships a comparable editing UI of their own. It's also not a full Grammarly replacement; there's no real-time underlining as you type, no plagiarism checker, and no team/style-guide features.