Skip to main content

Documentation Index

Fetch the complete documentation index at: https://mintlify.com/shrinathsnayak/cloudflare-experiments/llms.txt

Use this file to discover all available pages before exploring further.

Analyze all external resources and dependencies loaded by any webpage. Discover scripts, stylesheets, images, fonts, and iframes to understand a site’s external dependencies and third-party integrations.

​
API Endpoint

​
GET /analyze

Analyze all external dependencies of a webpage by providing its URL.
​
url
string
required
The URL of the webpage to analyze. Must be a valid HTTP or HTTPS URL.

​
Example Request

curl "https://your-worker.workers.dev/analyze?url=https://www.cloudflare.com"

​
Response Structure

​
success
boolean
Indicates if the request was successful
​
data
object
The analyzed dependencies from the webpage
​
data.scripts
string[]
Array of unique absolute URLs of JavaScript files loaded via <script src="...">. Includes all external scripts referenced in the HTML.
​
data.stylesheets
string[]
Array of unique absolute URLs of CSS files loaded via <link rel="stylesheet" href="...">. Includes all external stylesheets.
​
data.images
string[]
Array of unique absolute URLs of images. Extracts from both <img src="..."> and <source src="..."> tags.
​
data.fonts
string[]
Array of unique absolute URLs of font files. Extracts from:
  • <link rel="preload" as="font" href="...">
  • CSS url() declarations for .woff, .woff2, .ttf, .otf, and .eot files
​
data.iframes
string[]
Array of unique absolute URLs of embedded iframes via <iframe src="...">. Useful for identifying third-party embeds.

​
Example Response

{
  "success": true,
  "data": {
    "scripts": [
      "https://www.cloudflare.com/js/main.bundle.js",
      "https://www.googletagmanager.com/gtag/js?id=UA-12345678",
      "https://static.cloudflareinsights.com/beacon.min.js",
      "https://ajax.cloudflare.com/cdn-cgi/scripts/analytics.js"
    ],
    "stylesheets": [
      "https://www.cloudflare.com/css/main.css",
      "https://www.cloudflare.com/css/responsive.css",
      "https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700"
    ],
    "images": [
      "https://www.cloudflare.com/img/logo.svg",
      "https://www.cloudflare.com/img/hero-background.jpg",
      "https://imagedelivery.net/abc123/hero.png/public"
    ],
    "fonts": [
      "https://www.cloudflare.com/fonts/inter-regular.woff2",
      "https://www.cloudflare.com/fonts/inter-bold.woff2",
      "https://fonts.gstatic.com/s/inter/v12/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7.woff2"
    ],
    "iframes": [
      "https://www.youtube.com/embed/dQw4w9WgXcQ",
      "https://player.vimeo.com/video/123456789"
    ]
  }
}

​
Error Responses

​
Invalid URL

{
  "success": false,
  "error": "Missing or invalid query parameter: url",
  "code": "INVALID_URL"
}

​
Fetch Error

{
  "success": false,
  "error": "HTTP 404",
  "code": "FETCH_ERROR"
}

​
Deployment

1

Clone the repository

git clone https://github.com/your-org/cloudflare-experiments
cd cloudflare-experiments/experiments/dependency-analyzer
2

Install dependencies

npm install
3

Test locally

npm run dev
The API will be available at http://localhost:8787
4

Deploy to Cloudflare Workers

npm run deploy

​
Use Cases

  • Dependency Audits: Identify all third-party dependencies and external resources
  • Performance Analysis: Discover resource-heavy pages loading too many external files
  • Security Reviews: Find all external scripts and potential security risks
  • Privacy Compliance: Identify third-party trackers and analytics scripts
  • License Compliance: Discover all fonts and resources that may require licensing
  • CDN Optimization: Identify candidates for CDN migration or consolidation
  • Competitive Analysis: Understand what services and tools competitors use

​
Technical Details

  • Built with Hono framework
  • Runs on Cloudflare Workers
  • Regex-based HTML parsing for fast extraction
  • Automatically resolves relative URLs to absolute URLs
  • Deduplicates all resource URLs
  • Extracts fonts from both link tags and CSS url() declarations

​
Extraction Details

​
Scripts

  • Extracted from <script src="..."> tags
  • Includes inline and external JavaScript references
  • Does not include inline script content

​
Stylesheets

  • Extracted from <link rel="stylesheet" href="...">
  • Includes both standard and alternate stylesheets
  • Matches various ordering of rel and href attributes

​
Images

  • Extracted from <img src="..."> tags
  • Also extracts from <source src="..."> for responsive images
  • All formats supported (jpg, png, svg, gif, webp, etc.)

​
Fonts

  • Extracted from <link rel="preload" as="font"> or <link rel="stylesheet" as="font">
  • Also extracts from CSS url() declarations matching font extensions:
    • .woff and .woff2 (Web Open Font Format)
    • .ttf (TrueType Font)
    • .otf (OpenType Font)
    • .eot (Embedded OpenType)

​
Iframes

  • Extracted from <iframe src="..."> tags
  • Useful for identifying embeds from YouTube, Vimeo, Google Maps, etc.
  • Includes both same-origin and cross-origin iframes

​
Notes

  • All resource URLs are deduplicated across each category
  • Relative URLs are resolved using the base URL of the page
  • The tool fetches and analyzes the initial HTML only (does not execute JavaScript)
  • Resources loaded dynamically after page load are not captured

Build docs developers (and LLMs) love

Get started for freeTalk to us