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Prompt Defender

Everyday AI, without the exposure

From the websites you visit to the documents you share, AI is part of your everyday life. But not everything you encounter or share is safe. Prompt Defender helps protect you from hidden prompt injections, risky instructions and accidental exposure of sensitive information, so you can use AI with greater confidence.

People relaxing and using AI outdoors, connected to AI assistants

Two things go wrong
when you paste into AI.

Pasting content into an AI assistant quietly opens two doors: one lets attackers in, the other lets your own data out.

Hidden instructions

Web pages and documents can carry text you can't see, written to hijack an AI the moment you paste it in. You'd never spot it; your assistant would obey it.

Leaked secrets

API keys, client names, access tokens: all easy to drop into a chatbot by accident, and impossible to take back once they're sent.

Works where you work

Built for the AI tools you already use.

ChatGPT
Claude Claude
Gemini Gemini
Copilot Copilot
Perplexity Perplexity
Poe Poe
Grok Grok

How the defender works.

It works two ways: step in whenever you want, or let it watch your back automatically.

Add to browser
01Select, import, or let it watch

Highlight text, drop in a PDF or DOCX, or let it scan pages in the background and alert you to hidden instructions on its own.

Select, import, or let it watch
02Review what was flagged

See exactly what was flagged, removed, or masked, and why.

Review what was flagged
03Copy the clean version

Take the reviewed text, with hidden instructions and secrets handled.

Copy the clean version
04Share safely

Send the clean prompt to your AI tool, guarded end to end by the Defender.

Share safely

Good to know.

The questions we hear most about Prompt Defender.

Extension Privacy Policy and Support.