MaskPrompt

by Randel Reyes · Privacy & Security

Manifest V3 in_app

View in Chrome Web Store Data as of 15 Oct 2026

Privacy-focused browser extension that automatically redacts PII from AI prompts before they are sent.

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#351K

#269K among extensions

Version

1.0.2

updated 1 Jul 2026

Users

monthly, 4 months

Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 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 MaskPrompt

Automatically redacts emails, API keys, credit cards, and other PII from your prompts before they reach ChatGPT, Claude, or Gemini. No data leaves your browser. MaskPrompt is a privacy-first browser extension that detects and redacts Personally Identifiable Information (PII) from your AI prompts before they are sent. Every redaction happens entirely on your device — no data is ever transmitted to external servers. What it redacts: - Email addresses - Phone numbers - Credit card numbers - Social Security numbers - IP addresses - API keys (OpenAI, AWS, GitHub, Google, Stripe) Supported platforms: - ChatGPT (Free tier) - Claude (Free tier) - Gemini (Free tier) Free tier: 15 redactions/day on ChatGPT. Pro unlocks unlimited redactions, custom url, and custom regex patterns. Privacy: All PII detection runs locally in your browser. The extension never reads, stores, or transmits your prompt content. Only anonymous usage counters are synced to enforce quota limits.