43% of Employees Leak Sensitive Data to AI — Are You One of Them?Source: National Cybersecurity Alliance, 2025–2026
Stop Confidential Data From Reaching AI Chatbots
Names, credit cards, medical records, client files — once it's sent to ChatGPT, Claude, or Gemini, it's stored, trained on, and potentially exposed. PiiBlocker catches it before it leaves your browser.
Your message
Sent to AI (masked)
Does This Look Familiar?
Every time you paste personal information into an AI chatbot, you're handing it over to a third-party server, permanently logged and potentially used for model training.
“I have type 2 diabetes and my doctor prescribed metformin 500mg twice daily. Can you help me understand the side effects?”
AI services store your prompts. Your health data isn't yours anymore.
“My credit card 4532-1234-5678-9012, account number 8839201-44, expires next month. What's the best way to dispute a charge?”
One data breach exposes everything you've shared.
“My OpenAI key is sk-proj-Tx8m... Can you help me debug why my API calls are failing with a 401 error?”
AI training data can be extracted. Your secrets aren't secret.
43% of workers share sensitive data with AI tools every day.
This Isn't Hypothetical — It Already Happened
Real incidents from 2025–2026 that show why AI privacy protection isn't optional.
7 Million Users’ AI Chats Sold to Data Brokers
A Chrome extension with Google’s ‘Featured’ badge was discovered silently harvesting users’ AI conversations and selling them to data brokers. The extension had a 4.7-star rating and claimed to protect user privacy.
Source: Malwarebytes Research
Healthcare Workers’ Patient Data Found in Commercial Database
Researchers discovered that healthcare workers had been pasting real patient data — including names, dates of birth, and medical record numbers — into AI chatbots. This data was found in a searchable commercial database sold to third parties.
Source: The Register
Government Contractor Exposed Flood Relief Applicants’ Data
A government contractor accidentally pasted names, addresses, contact details, and health data of flood-relief applicants into ChatGPT. The incident triggered a government investigation and public outcry.
Source: redact.tools incident report
900,000 Users Hit by Fake AI Privacy Extensions
Two Chrome extensions posing as AI productivity tools were found exfiltrating users’ ChatGPT and DeepSeek conversations to attacker-controlled servers, capturing complete chat histories, browsing data, and authentication tokens.
Source: Dataprise Security Advisory
Watch PiiBlocker In Action
See how PiiBlocker detects and masks personal data in real-time, directly inside ChatGPT, Claude, and Gemini.
Privacy Shouldn't Be a Luxury
Enterprise privacy tools cost hundreds per month and require IT teams to deploy. PiiBlocker is free, runs entirely in your browser, and takes 10 seconds to install.
Free Forever
Core protection is free. Always. We’ll never put basic safety behind a paywall.
Your Device, Your Data
Zero servers. Zero data collection. We physically cannot see your information.
For Everyone
Freelancers, students, doctors, lawyers, developers — anyone who uses AI with real data deserves protection.
Three Steps to Privacy
Simple protection that works in the background
Type Normally
Write your prompt as you always do. PiiBlocker watches in the background and highlights personal data: names, addresses, credit cards, SSNs, API keys, and 15+ other types.
Review & Mask
Before your message is sent, a simple dialog shows what was detected. Critical data is auto-protected. You choose what else to mask.
- Credit card: 4111 ****
- API key: sk-abc***
- Name: Sarah Johnson
- Address: 42 Elm Street
AI Gets Placeholders
The AI sees [PERSON_A] instead of your real name. When it responds, PiiBlocker swaps placeholders back so you see your real data, seamlessly.
Hi, [PERSON_A] lives at [ADDRESS_1].
Hi, Sarah Johnson lives at 42 Elm Street.
15+ Types of Personal Data, Caught Automatically
PiiBlocker classifies every detection by risk level so you always know what's critical and what's optional.
Always masked. No choice needed.
Detected and flagged. Your call.
Missed something? Right-click any text > ‘Mask with PiiBlocker’ to catch what automation misses. Teach it your name, and it remembers. See all features >
We Can't See Your Data. By Design.
PiiBlocker is built on a simple principle: the safest server is no server. Your data stays on your device, encrypted, and under your control.
100% Local Processing
Everything runs in your browser. We don't have servers. We don't collect data. There's nothing to breach.
AES-256 Encryption
Mapping data is encrypted with military-grade encryption. Keys live only in memory, lost when you close the browser.
Auto-Expiring Data
Encrypted mappings expire after 4 hours. Or click one button to wipe everything instantly.
No Analytics, No Tracking
Zero third-party scripts. Zero telemetry. Zero cookies. We don't know who you are.
Free Forever. Pro When You're Ready.
Start protecting your data for free. Upgrade when you want automation and advanced features.
| Feature | Free $0 forever | ProSoon $4.99/mo |
|---|---|---|
| Detect 15+ PII types | ✅ | ✅ |
| Auto-mask critical data | ✅ | ✅ |
| Mask soft data | Manual per item | Fully automatic |
| ChatGPT + Claude + Gemini | ✅ | ✅ |
| Response unmasking | ✅ | ✅ |
| Right-click mask | ✅ | ✅ |
| Personal dictionary | ✅ | ✅ |
| Smart masking strategies | — | ✅ |
| Privacy dashboard | — | ✅ |
| Perplexity + more platforms | — | ✅ |
| Per-site rules | — | ✅ |
Free forever
- Detect 15+ PII types
- Auto-mask critical data
- ChatGPT + Claude + Gemini
- Response unmasking
- Right-click mask
- Personal dictionary
per month
- Everything in Free
- Fully automatic soft-PII masking
- Smart masking strategies
- Privacy dashboard
- Perplexity + more platforms
- Per-site rules
Pro launching soon. $4.99/month
Frequently Asked Questions
[PERSON_A]), and PiiBlocker automatically swaps them back to your real data. You see the full, natural response.