Wappalyzer

Wappalyzer identifies technologies on websites, such as CMS, web frameworks, ecommerce platforms, JavaScript libraries, analytics tools and more.

Prerequisites

• Git
• Node.js version 14 or higher
• Yarn

Quick start

git clone https://github.com/wappalyzer/wappalyzer.git
cd wappalyzer
yarn install

Usage

Chrome extension

• Go to about:extensions
• Enable 'Developer mode'
• Click 'Load unpacked'
• Select src

Firefox extension

• Go to about:debugging#/runtime/this-firefox
• Click 'Load Temporary Add-on'
• Select src/manifest.json

Specification

A long list of regular expressions is used to identify technologies on web pages. Wappalyzer inspects HTML code, as well as JavaScript variables, response headers and more.

Patterns (regular expressions) are kept in src/technologies/. The following is an example of an application fingerprint.

Example

"Example": {
  "description": "A short description of the technology.",
  "cats": [
    "1"
  ],
  "cookies": {
    "cookie_name": "Example"
  },
  "dom": {
    "#example-id": {
      "exists": "",
      "attributes": {
        "class": "example-class"
      },
      "properties": {
        "example-property": ""
      },
      "text": "Example text content"
    }
  },
  "dns": {
    "MX": [
      "example\\.com"
    ]
  },
  "js": {
    "Example.method": ""
  },
  "excludes": "Example",
  "headers": {
    "X-Powered-By": "Example"
  },
  "text": "\bexample\b",
  "css": "\\.example-class",
  "robots": "Disallow: /unique-path/",
  "implies": "PHP\\;confidence:50",
  "requires": "WordPress",
  "requiresCategory": "Ecommerce",
  "meta": {
    "generator": "(?:Example|Another Example)"
  },
  "probe": {
    "/path": ""
  },
  "scriptSrc": "example-([0-9.]+)\\.js\\;confidence:50\\;version:\\1",
  "scripts": "function webpackJsonpCallback\\(data\\) {",
  "url": "example\\.com",
  "xhr": "example\\.com",
  "oss": true,
  "saas": true,
  "pricing": ["mid", "freemium", "recurring"],
  "website": "https://example.com",
}

JSON fields

Find the JSON schema at schema.json.

Required properties

Optional properties

One of:

Plus any of:

Implies, requires and excludes (optional)

Patterns (optional)

Patterns

Patterns are essentially JavaScript regular expressions written as strings, but with some additions.

Quirks and pitfalls

• Because of the string format, the escape character itself must be escaped when using special characters such as the dot (\\.). Double quotes must be escaped only once (\"). Slashes do not need to be escaped (/).
• Flags are not supported. Regular expressions are treated as case-insensitive.
• Capture groups (()) are used for version detection. In other cases, use non-capturing groups ((?:)).
• Use start and end of string anchors (^ and $) where possible for optimal performance.
• Short or generic patterns can cause applications to be identified incorrectly. Try to find unique strings to match.

Tags

Tags (a non-standard syntax) can be appended to patterns (and implies and excludes, separated by \\;) to store additional information.

Version syntax

Application version information can be obtained from a pattern using a capture group. A condition can be evaluated using the ternary operator (?:).