Wappalyzer

Wappalyzer identifies technologies on websites, including content management systems, ecommerce platforms, JavaScript frameworks, analytics tools and much more.

• wappalyzer on NPM
• wappalyzer-core on NPM
• Chrome extension
• Firefox add-on
• Edge extension
• Wappalyzer REST APIs

Prerequisites

• Git
• Node.js version 12 or higher
• Yarn

Quick start

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

Usage

Command line

node src/drivers/npm/cli.js https://example.com

Chrome extension

• Go go about:extensions
• Enable 'Developer mode'
• Click 'Load unpacked'
• Select src/drivers/webextension

Firefox extension

• Go go about:debugging#/runtime/this-firefox
• Click 'Load Temporary Add-on'
• Select src/drivers/webextension/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.json. 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": {
      "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"
  },
  "html": "<link[^>]example\\.css",
  "css": "\\.example-class",
  "robots": "Disallow: /unique-path/",
  "implies": "PHP\\;confidence:50",
  "meta": {
    "generator": "(?:Example|Another Example)"
  },
  "script": "example-([0-9.]+)\\.js\\;confidence:50\\;version:\\1",
  "url": ".+\\.example\\.com",
  "website": "https://example.com",
}

JSON fields

Find the JSON schema at schema.json.

Required properties

Field	Type	Description	Example
cats	Array	One or more category IDs.	[1, 6]
website	String	URL of the application's website.	"https://example.com"

Optional properties

Field	Type	Description	Example
description	String	A short description of the technology in British English (max. 250 characters). Write in a neutral, factual tone; not like an ad.	"A short description."
icon	String	Application icon filename.	"WordPress.svg"
cpe	String	The CPE is a structured naming scheme for applications, see the specification.	"cpe:/a:apache:http_server"

Implies and excludes (optional)

Field	Type	Description	Example
implies	String | Array	The presence of one application can imply the presence of another, e.g. WordpPress means PHP is also in use.	"PHP"
excludes	String | Array	Opposite of implies. The presence of one application can exclude the presence of another.	"Apache"

Patterns (optional)

Field	Type	Description	Example
cookies	Object	Cookies.	{ "cookie_name": "Cookie value" }
dom	Object	Uses a query selector to inspect element properties, attributes and text content.	{ "#example-id": { "property": { "example-prop": "" } } }
dns	Object	DNS records: supports MX, TXT, SOA and NS (NPM driver only).	{ "MX": "example\\.com" }
js	Object	JavaScript properties (case sensitive). Avoid short property names to prevent matching minified code.	{ "jQuery.fn.jquery": "" }
headers	Object	HTTP response headers.	{ "X-Powered-By": "^WordPress$" }
html	String | Array	HTML source code. Patterns must include an HTML opening tag to avoid matching plain text. For performance reasons, avoid html where possible and use dom instead.	"<a [^>]*href=\"index.html"
css	String | Array	CSS rules. Unavailable when a website enforces a same-origin policy. For performance reasons, only a portion of the available CSS rules are used to find matches.	"\\.example-class"
robots	String | Array	Robots.txt contents.	"Disallow: /unique-path/"
url	String	Full URL of the page.	"^https?//.+\\.wordpress\\.com"
meta	Object	HTML meta tags, e.g. generator.	{ "generator": "^WordPress$" }
scripts	String | Array	URLs of JavaScript files included on the page.	"jquery\\.js"

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.

Tag	Description	Example
confidence	Indicates a less reliable pattern that may cause false positives. The aim is to achieve a combined confidence of 100%. Defaults to 100% if not specified.	"js": { "Mage": "\\;confidence:50" }
version	Gets the version number from a pattern match using a special syntax.	"scripts": "jquery-([0-9.]+)\.js\\;version:\\1"

Version syntax

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

Example	Description
\\1	Returns the first match.
\\1?a:	Returns a if the first match contains a value, nothing otherwise.
\\1?a:b	Returns a if the first match contains a value, b otherwise.
\\1?:b	Returns nothing if the first match contains a value, b otherwise.
foo\\1	Returns foo with the first match appended.