hidef — hide & define

by Dandy Lau · Privacy & Security

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Hides confidential details from ChatGPT, Claude, and Gemini before you send. Everything runs on your device.

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#357K

#272K among extensions

Version

0.1.0

updated 9 Jul 2026

Users

monthly, 3 months

Latest, 15 Oct 2026: 2 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About hidef — hide & define

Hides names, emails, and business details from ChatGPT, Claude, and Gemini before you send — restored locally after. hidef protects what you type into ChatGPT, Claude, and Gemini — before it ever leaves your browser. As you type, hidef quietly checks your message for things like names, emails, phone numbers, ID numbers, and company-confidential details. If it finds any, a review sheet shows you exactly what it caught before your message sends, so you decide what stays hidden and what's fine to share. Nothing sends until you say so. When the reply comes back, hidef restores the real names and details locally in your browser — the AI never saw them, but you still get a complete, readable answer. WHY IT'S DIFFERENT • Everything happens on your own computer. The extension only ever talks to a small companion program (hidef) running on your machine — never to any server we operate. We couldn't see your data if we wanted to. • No account, no sign-up, no telemetry, no analytics. • Open source and auditable — the code, the detection rules, and the security write-up are all public on GitHub. • Works on chatgpt.com, claude.ai, and gemini.google.com. BEFORE YOU INSTALL This extension needs the free hidef companion program running on your computer to work — it's the part that actually recognizes sensitive details and remembers how to restore them. Setup takes about five minutes; instructions are in the extension's popup and at the GitHub link above. This extension is under active development. Bug reports and feedback are welcome on GitHub.