PromptCurtain
A LITTLE PRIVACY. A LOT OF PEACE OF MIND.

Keep the context.
Protect the personal.

A portable, offline tool for reviewing, protecting and restoring everyday AI prompts—with Markdown support and no installation. Paste your prompt below, then bring the AI's reply back to restore matching details.

Good prompts.
Fewer personal details.
TRY A FICTIONAL EXAMPLE
Protect your prompt
Mask replaces the whole value.alex.morgan@example.test → [EMAIL_1]
Markdown supported

Select a detail the highlights missed, then choose Protect selection. Manual selections clear when you edit the prompt.

0 characters

02Protected prompt

Awaiting your text
A little less personal. Just as useful.
Your protected prompt will appear here,
ready for your next conversation.
Only you can see your text
Customize what gets protected All categories are on by default. Credentials are always masked.
WHAT SHOULD WE PROTECT?Choose the details to look for

Paths with spaces? Wrap them in quotes: "\\server\Shared Files\report.xlsx". Add custom phrases for student IDs, employee IDs, or other internal details.

Your text stays in this browser. Nothing is uploaded.
A helpful layer, not a guarantee. Detection can miss details, especially names, international addresses, and unusual formats. Review the result and add custom phrases before sharing.
After your AI replies
No prompt mapping yet

Copy the protected prompt above first. Paste the AI’s reply below to restore matching details from your last copied prompt. Details the AI left out stay out.

Markdown supported
0 characters

04Restored reply

Awaiting a reply
Your reply, with original details back in place.
Matching details are restored locally
Original details are restored only on this device.

Your text stays yours

Processed in your browser. Never sent to
a server, saved, or used to train a model.

Keep the meaning intact

Consistent placeholders preserve context,
so your AI can still connect the dots.

Made for any AI

Copy your protected prompt into ChatGPT,
Claude, Gemini, or wherever you think next.