Wappalyzer

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

If you don't have time to configure, host, debug and maintain your own infrastructure to analyse websites at scale, we offer a SaaS solution that has all the same capabilities and a lot more. Our apps and APIs not only reveal the technology stack a website uses but also company and contact details, social media profiles, keywords and metadata.

Prerequisites

Git
Node.js version 14 or higher
Yarn

Quick start

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

Usage

Command line

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

Chrome extension

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

Firefox extension

Go to 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/. 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"
  },
  "html": "<link[^>]example\\.css",
  "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

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	CPE is a structured naming scheme for technologies. To check if a CPE is valid and exists (using v2.3), use the search).	`"cpe:2.3:a:apache:http_server` `::::::::"`
`saas`	Boolean	The technology is offered as a Software-as-a-Service (SaaS), i.e. hosted or cloud-based.	`true`
`oss`	Boolean	The technology has an open-source license.	`true`
`pricing`	Array	Cost indicator (based on a typical plan or average monthly price) and available pricing models. For paid products only. One of: `low`Less than US $100 / mo `mid`Between US $100 - $1,000 / mo `high`More than US $1,000 / mo Plus any of: `freemium` Free plan available `onetime` One-time payments accepted `recurring` Subscriptions available `poa` Price on asking `payg` Pay as you go (e.g. commissions or usage-based fees)	`["low", "freemium"]`

Implies, requires and excludes (optional)

Field	Type	Description	Example
`implies`	String \| Array	The presence of one application can imply the presence of another, e.g. WordPress means PHP is also in use.	`"PHP"`
`requires`	String \| Array	Similar to implies but detection only runs if the required technology has been identified. Useful for themes for a specific CMS.	`"WordPress"`
`requiresCategory`	String \| Array	Similar to requires; detection only runs if a technology in the required category has been identified.	`"Ecommerce"`
`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`	String \| Array \| 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$" }`
`html`	String \| Array	HTML source code. Patterns must include an HTML opening tag to avoid matching plain text. For performance reasons, avoid `html` where possible and use `dom` instead.	`"<a [^>]*href=\"index.html"`
`text`	String \| Array	Matches plain text. Should only be used in very specific cases where other methods can't be used.	`\bexample\b`
`css`	String \| Array	CSS rules. Unavailable when a website enforces a same-origin policy. For performance reasons, only a portion of the available CSS rules are used to find matches.	`"\\.example-class"`
`probe`	Object	Request a URL to test for its existence or match text content (NPM driver only).	`{ "/path": "Example text" }`
`robots`	String \| Array	Robots.txt contents.	`"Disallow: /unique-path/"`
`url`	String \| Array	Full URL of the page.	`"^https?//.+\\.wordpress\\.com"`
`xhr`	String \| Array	Hostnames of XHR requests.	`"cdn\\.netlify\\.com"`
`meta`	Object	HTML meta tags, e.g. generator.	`{ "generator": "^WordPress$" }`
`scriptSrc`	String \| Array	URLs of JavaScript files included on the page.	`"jquery\\.js"`
`scripts`	String \| Array	JavaScript source code. Inspects inline and external scripts. For performance reasons, avoid `scripts` where possible and use `js` instead.	`"function webpackJsonpCallback\$data\$ {"`

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.

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.	`"scriptSrc": "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.

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