About

AI writing assistants are getting better every day. Millions of people now ask ChatGPT, Claude, or Gemini to rewrite their emails, cover letters, contracts, and articles. But once the AI rewrites your text, how do you know exactly what changed?

Re-reading the entire document takes time and leaves room for error. Copying both versions into a developer tool like git diff is out of reach for most people. What AI Done was built to fill that gap.

Paste your original text and the AI-edited version. Click compare. See every addition, deletion, and moved paragraph highlighted side by side — instantly, without any sign-up, and without sending your text to any server.

The diff runs entirely in your browser using a Myers difference algorithm — the same family of algorithms used in Git and VS Code. It compares paragraphs first, then drills down to individual words for modified sections.

• Green — text added by the AI
• Red — text removed by the AI
• Yellow — paragraphs moved to a different position
• Unchanged text is shown in full so you keep context

You can also restore individual changes you don't want to keep, then copy the final version with one click.

Your documents never leave your device. The extraction and comparison algorithms run as JavaScript in your browser tab. No text is stored, indexed, or transmitted.

The only optional feature that contacts a server is AI analysis — when you ask for an AI-generated summary of the changes. Even then, only a compact diff representation (not your full document) is sent to the server.

• Plain text (.txt) — paste directly or drop a file
• Word documents (.docx) — text is extracted locally via mammoth.js
• PDF files (.pdf) — native PDFs only; scanned pages are not supported

The core diff tool is and will always be free. No account, no paywall, no ads on the diff itself. The project is sustained by optional AI analysis credits and unobtrusive display advertising.