How to Build a Web Scraping API Like Firecrawl

Tired of Messy Data and Expensive Scraping Tools?

Let’s be honest. Getting clean content from a website is a pain.

You’re either wrestling with complex code, dealing with blocked requests, or paying high monthly fees for a web scraping API.

What if I told you that you could build your own powerful, serverless API—just like Firecrawl—in the next 5 minutes? And it’s practically free.

Sound good? Let’s dive in.

Why Build Your Own Web Scraping API?

You might be thinking, “Why not just use an off-the-shelf tool?”

Control. Speed. Cost.

When you build your own web scraping API, you have 100% control. No rate limits you don’t set yourself. No surprise bills.

And by using Cloudflare Workers, you’re running your code on a global network, which means it’s incredibly fast. The best part? Cloudflare’s free tier is so generous you can likely run this for zero cost.

The Secret Weapon: Cloudflare Workers

Cloudflare Workers lets you run JavaScript code on the edge, which means it’s serverless. No servers to manage, no infrastructure to worry about.

You just upload your code, and it works. Instantly.

We’re going to deploy a small but mighty script that can:

• Fetch any webpage.
• Clean all the junk out (ads, nav bars, footers).
• Convert the content into useful formats.

This is exactly what you need to turn any webpage into clean data for your projects.

What Your New API Will Do

This isn’t just a simple scraper. It’s a versatile tool designed to convert any webpage to LLM-ready formats.

Here’s a quick look at what you’ll be able to do:

• Convert any webpage to MD: Instantly get clean Markdown, perfect for knowledge bases or feeding into an AI model.
• Turn any webpage to JSON: Extract the title, description, and content in a structured JSON format.
• Get clean HTML: Strip out all the unnecessary scripts and tags, leaving you with just the core content.
• Extract all links: Instantly pull every link from a page to create a simple feed.

Ready to build it?

How to Build Your Web Scraping API in 3 Simple Steps

You don’t need to be a coding genius to do this. Just follow these steps, and you’ll have a live API endpoint in minutes.

Step 1: Grab the Code

Someone has already done the hard work for you. The complete Cloudflare Worker code is ready to go.

You can find the verified code on this GitHub Gist:
Cloudflare Web to Markdown/JSON Worker Script

Open that link and copy the entire script to your clipboard.

Step 2: Create a New Cloudflare Worker

Now, let’s get it deployed.

1. Log in to your Cloudflare dashboard. (If you don’t have an account, it’s free to create one).
2. In the left sidebar, navigate to Workers & Pages.
3. Click on Create Application, then Create Worker.
4. Give your Worker a unique name (e.g., my-web-scraper) and click Deploy.

You’re almost there!

Step 3: Paste and Deploy the Code

Cloudflare will show you a default “Hello World” script. We need to replace that.

1. Click Edit code.
2. Delete all the boilerplate code in the editor.
3. Now, paste the code you copied from the GitHub Gist.
4. Hit the blue Save and Deploy button.

That’s it! Your API is now live on the internet. Cloudflare will give you the URL for your new Worker.

How to Use Your New Web Scraping API

Using your API is as simple as building it. All you need to do is structure a URL with the right parameters.

Your base URL will look something like this: https://my-web-scraper.your-name.workers.dev

How to Convert a Webpage to MD

Want the content of a blog post in clean Markdown? Just add the url parameter.

?url=https://example.com/blog-post

By default, the API returns Markdown (format=md) and aggressively cleans the page (clean=aggressive). This gives you just the core article content.

Getting Clean JSON Data from a Webpage

If you need structured data, just ask for it. The webpage to json functionality is perfect for feeding data into another application.

Set the format to json:

?url=https://example.com/blog-post&format=json

The output will give you the title, description, language, and the full content in Markdown.

Extracting Links from a URL

Need to quickly see all the links on a page? Use the feed parameter.

?url=https://example.com&feed=true

This will return a simple list of all the <a href> links found on the page. Super useful for discovery or analysis.

Unlocking the Real Power: From Webpage to LLM

So you have this amazing tool that turns any webpage into clean data. Now what?

The real magic happens when you connect this to an AI model. This is the core idea behind webpage to LLM pipelines.

You can use this API to:

• Build a custom knowledge base: Scrape your company’s documentation and feed it into a retrieval-augmented generation (RAG) system.
• Create research agents: Give an AI agent the ability to “read” web pages by calling your API to get clean content.
• Automate content summaries: Pipe the Markdown output directly into a GPT model to get instant summaries.

The code even has a reserved summary=true parameter for future AI summarization features. You built a future-proof tool without even realizing it!

Conclusion

You did it.

In just a few clicks, you now have a personal, serverless, and powerful web scraping API. You can turn any messy webpage into clean Markdown, structured JSON, or simple HTML—instantly.

No more paying for expensive services or wrestling with complex libraries. You now have full control to get the data you need, exactly how you need it.

So, what’s the first website you’re going to scrape?