# What is Nolex?

**Nolex** is a Chrome browser extension that protects your sensitive data when using AI services like ChatGPT, Claude, Gemini, DeepSeek, and others.

## The Problem

Every day, millions of people paste code, configs, and documents into AI chatbots. Often, this data contains:

* API keys and tokens (OpenAI, AWS, Stripe...)
* Passwords and database connection strings
* Personal data (emails, phone numbers, credit cards)
* Private keys and certificates

Once sent, **this data is no longer under your control**. It may be stored, logged, or used for training.

## The Solution

Nolex acts as a **security layer between you and AI**. It automatically scans everything you upload or paste, and if it finds sensitive data, it warns you **before** the data leaves your browser.

```
You paste code with API key
        |
        v
  [Nolex intercepts]
        |
        v
  "AWS key detected!"
        |
   +---------+-----------+
   |         |           |
Cancel   Keep As Is   Replace
   |         |           |
 Nothing   Original   aws_key=****
 sent      sent        sent
```

## Key Principles

| Principle              | What it means                                                             |
| ---------------------- | ------------------------------------------------------------------------- |
| **Local-first**        | All scanning happens in your browser. No data is sent to any server.      |
| **Zero configuration** | Works immediately after installation. No account required.                |
| **Non-blocking**       | You always decide what happens. Nolex never blocks you silently.          |
| **Open source**        | Full source code available on [GitHub](https://github.com/Defyzzz/nolex). |

## What Nolex Protects

Nolex detects **40+ types of sensitive data** out of the box:

* **API Keys** -- OpenAI, Anthropic, Google, AWS, Stripe, GitHub, Slack, Discord, and more
* **Database URLs** -- PostgreSQL, MySQL, MongoDB, Redis connection strings with credentials
* **Authentication** -- JWT tokens, private keys, session tokens
* **Personal Data** -- Emails, phone numbers, credit card numbers
* **Custom Patterns** -- You can add your own detection rules

## Two Protection Layers

### Layer 1: File Upload Scanning

When you drag-and-drop or attach a file to any AI chatbot, Nolex reads the file content **locally**, scans it for sensitive data, and shows you what it found.

### Layer 2: Clipboard Protection

When you paste text (Ctrl+V / Cmd+V) into any input field, Nolex checks the clipboard content before it reaches the page.

***

> **Ready to get started?** Head to [Installation](/nolex-docs/getting-started/installation.md) to add Nolex to your browser in under a minute.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://nolex.gitbook.io/nolex-docs/getting-started/readme.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.