Detect and mask sensitive information locally before your prompts leave the browser.
Users
11
0 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
4
0 in 30 days
Store rank
#184K
#153K among extensions
Version
0.2.0
updated 17 Jun 2026
Users
monthly, 4 months
Latest, 15 Oct 2026:11 usersMove the mouse over the chart for any month
Ratings count
monthly, 4 months
Latest, 15 Oct 2026:4 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 Atrium Browser Lite
# 🔒 Atrium Browser Lite
Atrium Browser Lite automatically detects and masks sensitive information before prompts are sent to AI assistants and chat platforms.
Whether you're a developer, consultant, founder, analyst, or everyday AI user, accidental data exposure can happen in seconds. Atrium reduces that risk by protecting information before it leaves your browser — locally, with zero telemetry.
# 🌍 Choose What You Protect
Pick the regions and privacy regimes you care about (GDPR, HIPAA, UU PDP, PDPA, Privacy Act) — or simply enable Global mode. Only the detectors you choose will run.
**Global**
• API keys & tokens
• Email addresses
• Phone numbers
• Credit cards
• Personal names
**Indonesia**
• NIK
• NPWP
• Addresses
• Company & legal document numbers
**Singapore**
• NRIC
• FIN
• UEN
• Passport numbers
**Australia**
• Medicare
• TFN
• ABN
• ACN
**United States**
• SSN
• EIN
• Driver license numbers
• Routing & bank account numbers
• Health identifiers
**Malaysia, Thailand, Vietnam**
• National identification numbers
**Custom Dictionary**
• Exact match terms
• Case-insensitive terms
• Regular expressions (Regex)
# ⚙️ How It Works
Atrium inspects outgoing prompts on supported AI platforms and replaces sensitive values with safe placeholders before submission.
Examples:
[john@example.com](mailto:john@example.com) → [[EMAIL_1]]
081234567890 → [[PHONE_1]]
sk-proj-xxxxxxxx → [[API_KEY_1]]
Optionally, original values can be restored inside the AI response so the model remains useful while the platform never receives your actual data.
# 🛡️ Privacy First
✓ Runs entirely inside your browser
✓ No backend
✓ No account required
✓ No telemetry
✓ Never stores your original prompt values
✓ Activity history is automatically removed after 7 days
✓ Open source (MIT License)
# 📊 More Than Masking
Atrium provides additional controls for everyday AI usage:
• Activity log with searchable history (type, platform, time — never the actual value)
• Export activity logs to JSON or CSV
• Per-site controls to enable or pause protection
• Per-detector toggles
• Regional privacy presets
# 🚀 Built for the AI Era
As AI becomes part of everyday work, protecting sensitive information should be automatic.
Atrium adds a lightweight privacy layer between your data and AI systems, helping individuals and organizations use AI with greater confidence.
Built in Jakarta • Open Source • Privacy First