Someone shared a document with you. Here's what you're looking at.

They made it in about a minute — pasted a draft, marked up the parts worth your attention, and sent you one link. There's no app to install, no account to create, and nothing to pay. The whole document travels inside the link itself; it was never uploaded to any server.

What PassbackAI is

PassbackAI is a free, in-browser tool for marking up text — the comment layer a chat box doesn't have. Most people use it to give an AI answer (from Claude, ChatGPT, Gemini, or Cursor) precise, multi-point feedback in one pass. But it works on any text: a draft, a brief, a contract clause, a paragraph that isn't landing. Whoever shared this link used it to point at specific passages and hand the whole thing to you in one place.

How they made it, in about a minute

1. Pasted the textThey dropped a draft straight into passbackai.com. No upload, no formatting step — paste and it's a document.
2. Highlighted what mattersThey selected passages and attached a note to each — a question, a correction, a "is this right?" — anchored to the exact words.
3. Sent you one linkPassbackAI packed the document and the notes into a single link. That link is what landed in your inbox or chat.

Is it private? Where did my document go?

Nothing was uploaded to any server — the document lives inside the link itself, and your browser unpacks it locally. There is no backend, no database, and no account behind any of this. You can confirm it in your browser's DevTools → Network: opening the link makes no request that carries the document.

The honest caveat: because the document is the link, anyone who has the link can open it. Treat the link the way you'd treat the document. If the sharer needed it truly private, PassbackAI can lock a link with a password — the password is the key, and it's never stored in the link or anywhere else.

How to leave your feedback

Reading is the easy part — just scroll. To respond, select any passage in the document and a comment box appears, anchored to those exact words. Add as many comments as you want, wherever they belong. When you're done, hit Copy comments to bundle everything into one structured block you can paste back — into a reply, an email, or the AI chat you're working in. Your comments stay in your browser too; they don't go anywhere until you copy or re-share them.

Why this beats comments in an email or chat

Feedback typed into a chat or an email thread loses its target. "The second paragraph, the part about pricing — change that" is work to write and work to act on, and by the fifth note everyone has lost the thread. Anchored comments fix that: each point sits on the exact words it's about, all of them travel together, and the next reader — a person or a language model — lands every fix on its target without a round of "which part did you mean?"

Want to make one yourself?

It's the same tool, open to anyone, free. Paste a draft, mark it up, share the link. That's the whole loop.