● Covered by 1 source · 1 reportLow impact1 neutral
PISIGuard Browser Extension Protects Sensitive Information in AI Chats
Key points
- PISIGuard masks sensitive data in AI chat inputs.
- It replaces PISI with placeholders before sending to AI.
- Original values are restored in the AI's response.
- All data processing happens locally in the browser.
Introduction of PISIGuard
PISIGuard is a new browser extension designed to protect users' personally identifiable and sensitive information (PISI) when interacting with AI chat models. The tool aims to prevent sensitive data from being transmitted to AI servers by masking it before submission.
How PISIGuard Works
The extension identifies common sensitive information, including names, email addresses, phone numbers, credit card numbers, passwords, and API keys, within user inputs. Before the message is sent to the AI, PISIGuard replaces these identified pieces of data with unique placeholders. After the AI generates a response, the extension automatically restores the original sensitive values into the AI's reply, making the process largely invisible to the user.
Local Processing and Privacy
A key feature of PISIGuard is that all detection, masking, and restoration processes occur entirely within the user's browser. No data is sent to external servers or services, ensuring that sensitive information remains on the user's device. This local processing model means that only the user and the AI (which only sees placeholders) interact with the sensitive data.
Compatibility and Customization
PISIGuard is compatible with popular AI chat platforms such as ChatGPT, Claude, and DeepSeek. It is available for various browser families, including Chrome-based browsers (Edge, Opera) and Mozilla Firefox. For advanced users, the extension offers configurability, allowing for the provision of custom rules to detect specific sensitive information.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
The daily brief
One email each morning: the day's tech stories, clustered across outlets and summarized. No account needed.
One email a day. Unsubscribe in one click, any time.
Today's brief
Spend a few minutes, get the whole day. Every topic's top stories in one hands-free rundown — listen, watch, or read the transcript.
▶ Play today's brief
New every morning, and the back catalogue is archived by date.
Primary sources
GitHub cmc_internal/api GitHub github/collect GitHub mohamed--abdel-maksoud/pisiguard GitHub _private/browser GitHub get-started/accessibility GitHub open-source/sponsorsReporting from
PISIGuard, a new browser extension, automatically detects and masks personally identifiable and sensitive information (PISI) before it is sent to AI chat platforms like ChatGPT, Claude, and DeepSeek. This tool addresses privacy concerns by ensuring sensitive data, such as names, emails, and API keys, is replaced with placeholders during AI interaction and restored in the AI's response, with all processing occurring locally in the browser.