editGPT
editGPT adds proofreading and tracked-changes functionality to ChatGPT, highlighting insertions and deletions just like a word processor.
About
editGPT is a browser extension that sits on top of ChatGPT and turns it into a collaborative editing environment. Ask ChatGPT to proofread or revise your text and editGPT will display the changes with tracked insertions and deletions, letting you accept or reject each one the way you would in Microsoft Word. It supports more than 20 languages, allows custom editing prompts, and can import and export Word documents while preserving the tracked-change markup. A free tier is available, with Pro and Elite plans offering expanded usage.