> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ambientmeta.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Chrome Extension

> Detect and strip PII directly in ChatGPT, Claude, and Gemini

## Overview

**AmbientMeta Privacy Guard** is a Chrome extension that automatically detects PII as you type into LLM chat interfaces. It works on:

* [ChatGPT](https://chatgpt.com)
* [Claude](https://claude.ai)
* [Gemini](https://gemini.google.com)

The extension highlights detected entities inline and lets you sanitize text with one click before sending it to the LLM.

## How It Works

1. **Real-time scanning** — As you type in a chat input, the extension calls the AmbientMeta API to detect PII entities in your text.
2. **Inline highlighting** — Detected entities (names, emails, phone numbers, etc.) are highlighted directly in the input field.
3. **One-click sanitize** — Click the sanitize button to replace all detected PII with safe placeholders before sending your message.

All detection runs through the AmbientMeta backend API (`POST /v1/sanitize`), so detection quality is identical to the API and every scan feeds the learning flywheel.

## Authentication

The extension supports two modes:

### Signed Out (Free)

* Uses a shared extension key
* Limited to **50 sanitizations per day** (detection/highlighting is unlimited)
* No account required

### Signed In (Google)

* Sign in with Google via the extension popup
* The extension authenticates using `POST /v1/auth/google-extension`
* An API key is automatically provisioned for your account
* Unlimited sanitizations on paid plans

## Daily Limits

| Mode                  | Detection (highlighting) | Sanitization             |
| --------------------- | ------------------------ | ------------------------ |
| Signed out            | Unlimited                | 50/day                   |
| Signed in (free plan) | Unlimited                | 50/day (server-enforced) |
| Signed in (Pro)       | Unlimited                | Unlimited                |
| Signed in (Pro Plus)  | Unlimited                | Unlimited                |

<Note>
  Detection calls (for inline highlighting) do **not** count toward the daily limit. Only full sanitization requests are counted.
</Note>

## Configuration

The extension scans for these entity types by default:

* `PERSON` — Names
* `EMAIL_ADDRESS` — Email addresses
* `PHONE_NUMBER` — Phone numbers
* `SSN` — Social Security Numbers
* `CREDIT_CARD` — Credit card numbers
* `LOCATION` — Places and cities
* `ADDRESS` — Physical addresses

## Technical Details

* **Manifest V3** Chrome extension
* Detection debounced at 1.5 seconds after typing stops
* Minimum 10 characters before scanning triggers
* All API calls go through the background service worker
* Credentials stored in `chrome.storage.local`

## Installation

The extension is available from the Chrome Web Store. After installing:

1. Click the AmbientMeta icon in your toolbar
2. (Optional) Sign in with Google for higher limits
3. Navigate to ChatGPT, Claude, or Gemini
4. Start typing — PII will be highlighted automatically