1Type or paste as usual
Write in ChatGPT or Claude, or attach a PDF, Word or text file.
Catch leaks before
you hit send.
- Spots sensitive data
- Warns you
- Swaps in safe data
- Free for personal use
- No sign-up
- Prompts never leave your browser
Before anything leaves your browser, Preflight checks for Aadhaar numbers PAN GSTIN bank accounts & IFSC phone numbers API keys passwords private keys database URLs .env files pasted source code and words only you know are private
How it works
Nothing new to learn. Keep using AI the way you already do.
2Preflight checks first
When you hit send, it scans the message and attachments on your device, in a blink.
3You decide
Swap in safe placeholders, send anyway, or close it and edit. Preflight never blocks you.
4The AI still helps
Your prompt keeps its meaning. Only the real values are gone.
Same prompt. None of the risk.
One click turns what you pasted into something safe to send.
Draft a payment reminder for our client.
His PAN is ABCDE1234F and payments go to Account Number: 50100234567890, IFSC HDFC0001234.
Use our key sk-proj-a81F…kQ2 to test the invoice API.
- Tax ID that can be misused for fraud
- Bank details stored on someone else's server
- A live key anyone could run up bills on
Draft a payment reminder for our client.
His PAN is [SYNTHETIC_PAN] and payments go to Account Number: [SYNTHETIC_BANK_ACCOUNT], IFSC [SYNTHETIC_IFSC].
Use our key [REDACTED_OPENAI_KEY] to test the invoice API.
- The AI can still write the reminder
- Placeholders make it obvious what was removed
- You review the result before it goes
Private by design.
A privacy tool shouldn't need your data. Preflight doesn't.
Runs on your device
Every check happens inside Chrome. No servers, no AI calls, nothing uploaded.
No account
Install it and you're protected. No email, no sign-up, no tracking.
Only on AI sites
It runs on ChatGPT and Claude and nowhere else. It can't see your other tabs.
Only counts are kept
Preflight notes what type of data it caught and when, never the text. Clear it anytime, or uninstall and it's gone.
Two ways in.
Free for you. Enterprise when your whole team needs it.
Free
For you
₹0 forever
- Every detector, on your device
- PDF, Word and text attachments
- One-click safe replacements
- Pause it, turn it off per site, choose what it checks
- A weekly count of what it caught
Enterprise
For your company
Custom for your team size
- Everything in Free
- Private keyword lists for code names, clients and projects
- Admin dashboard: counts and types, never prompt text
- Full history with CSV and JSON export
- AI checks for contracts, financials and strategy docs
Coming soon
- Admin rules: warn or block by data type
- Roll out to every laptop through Google Admin
- Alerts when something critical is caught
Questions, answered.
Does Preflight read my chats?
It only looks at the message you're about to send, at the moment you hit send, and it does that on your own computer. On the free plan nothing is sent to anyone, including us.
Which sites does it work on?
ChatGPT (chatgpt.com and chat.openai.com) and Claude (claude.ai). More AI tools are on the way.
Will it stop me from sending?
Never. It shows you what it found and you choose: replace with safe data, send anyway, or go back and edit. If anything goes wrong on our side, your message goes through as normal.
What does "Replace with Safe Data" do?
It swaps each sensitive value for a clear placeholder like [SYNTHETIC_PAN] or [REDACTED_OPENAI_KEY]. You see the edited prompt before it's sent, and the AI can still do the task.
Does it check files I attach?
Yes. PDF, Word (.docx) and text files are read on your device and checked the same way as typed text.
Can I pause it or turn it off?
Yes. Click the Preflight icon to pause it for an hour, turn it off on one site, or switch off checks you don't need. If it flags something that isn't sensitive, mark it "Not sensitive" and it won't warn you about that value again.
Can I add my own words to watch for?
Private keywords are part of Enterprise. Your company sets lists like project code names and client names, and Preflight warns before any of them are pasted.
How do companies roll it out?
An admin shares a company access token, which each person enters in the Preflight popup. Rolling out through Google Admin is coming soon. Admins see how often and what type of data was caught, never what anyone typed.
Does it catch everything?
No tool can. Preflight is a safety net for the mistakes that happen most: IDs, financial details, keys and passwords, plus your company's private terms on Enterprise. It's not a reason to stop thinking before you paste.
Free · No sign-up · Runs on your device
Use AI without the oops.
Install Preflight once. It quietly checks every prompt from then on.
Add to Chrome, it's free