By capability · Structured data

Extract structured data from a website into typed JSON

The short answer

To extract structured data from a website, send the page URL and a schema of the fields you want, and get typed JSON back instead of writing a parser. ClawEngine renders the page so JavaScript content is present, maps it to your schema, and returns a consistent record: name and price for a product, title and date for an article, or any shape you define. There are no CSS selectors to maintain. It runs on public, permitted pages only, reads robots.txt and honors crawl-delay. Plans start at $39 a month.

Clean markdown & JSON · JavaScript rendered · robots.txt respected

Last updated August 2026

Live Extraction

Endpoint · POST /v1/extract

POST

try:

Hit Extract to turn this page into clean, LLM-ready data.

robots.txt respected · public data only

Markdown · JSON · structured fields, from one API call. Crawling, rendering and extracting ...

To extract structured data from a website, you normally write a brittle parser, maintain selectors that break on every redesign, and add a headless browser for the JavaScript pages. ClawEngine collapses all of that into one API call: it renders the page, then maps it to a schema you define and returns typed JSON.

Name the fields you want and ClawEngine fills them, whether that is products with price and rating, articles with author and date, or any other shape you describe. The output is consistent and ready for a database or a pipeline. It runs only on public, permitted pages, respects robots.txt and site Terms of Service, and honors crawl-delay.

CRAWL RENDER JS EXTRACT MARKDOWN JSON

Any URL in LLM-ready data out

robots.txt respected public data only

Why it works

What you get with Structured data

No brittle selectors

Describe the data you want and ClawEngine maps the page to it, so you stop maintaining CSS selectors that break the next time a site is redesigned.

Consistent typed records

Every page comes back in the same schema with the same types, so downstream code can rely on a stable, predictable structure.

JavaScript included

Pages that build their content with scripts are rendered first, so structured extraction works on modern sites, not just static HTML.

What it handles

Any URL in, clean structured data out

Point ClawEngine at a public page and it crawls, renders the JavaScript and extracts clean markdown or typed JSON in one call. Define a schema for structured fields, and respect robots.txt and Terms of Service by default.

Maps any public page to a schema you define
Returns consistent typed records
Replaces brittle custom parsers
Renders JavaScript before mapping fields
Drops straight into databases and pipelines
Respects robots.txt, ToS and crawl-delay

POST /v1/extract extraction result

200 · JSON

{
  "url": "https://example.com/products/atlas",
  "title": "Atlas Field Notebook",
  "markdown": "# Atlas Field Notebook\n\nDurable...",
  "data": {
    "name": "Atlas Field Notebook",
    "price": 24.00,
    "currency": "USD",
    "rating": 4.7
  },
  "links": [ "/products", "/cart" ],
  "metadata": { "rendered": true }
}

JS rendered · boilerplate stripped ✓ robots.txt respected

Why ClawEngine

One API that crawls, renders and extracts

Not a raw HTML dump, not a headless browser fleet to run, and not a brittle parser to maintain. One call crawls a public page, renders its JavaScript and returns clean markdown or typed JSON, built for RAG pipelines and AI agents.

LLM-ready output

Clean markdown or typed JSON with the boilerplate stripped, so the data drops straight into a vector store, a prompt or an agent without a cleanup step.

JavaScript rendered

Each page loads in a real browser environment before extraction, so single-page apps and client-rendered content come back complete, not as an empty shell.

Compliance-first

ClawEngine works on public, permitted data only. It respects robots.txt and site Terms of Service and honors crawl-delay, so responsible scraping is the default.

Extract structured data from a website: the questions buyers ask

How do I extract structured data from a website?

Define the fields you want as a schema, then send the page URL and that schema to an extraction API. It renders the page, locates each value and returns typed JSON in the shape you asked for. The alternative, writing CSS or XPath selectors per site, breaks every time a page is redesigned. ClawEngine maps the rendered page to your schema, so you maintain a field list instead of a parser, and it works on public pages only.

What is the difference between structured and unstructured web data?

Unstructured data is the page as-is: prose, markup and layout with no defined fields. Structured data is that content mapped to named, typed fields you can query, like price as a number or published_at as a date. Models and databases work far better with structure, so the extraction step converts the messy page into records. ClawEngine returns both, cleaned markdown for the whole page and typed JSON for the fields you name.

Can I extract data without writing CSS selectors?

Yes, and that is the point of a schema-based extractor. Instead of pinning a selector to a specific element that moves when the page changes, you describe the field you want and let the service find it on the rendered page. That survives redesigns far better than hand-written selectors. ClawEngine maps each page to your schema and returns the same typed shape every time, so downstream code stays stable.

Does structured extraction work on dynamic, JavaScript-rendered pages?

It does when the tool renders the page first. Content that a site builds client-side is absent from the raw HTML, so a parser that reads only HTML returns empty fields. ClawEngine loads each page in a real browser environment and waits for the content to build before it extracts, so data injected after load is captured just like static markup. This is the most common reason extraction returns blanks.

How do I keep structured data consistent across different websites?

Define one schema and apply it to every source, so each site maps to the same field names and types regardless of its layout. That is what makes a multi-site feed usable: every record has the same shape whether it came from a store, a directory or a marketplace. ClawEngine returns typed JSON against your schema on every page, so your database and downstream code never branch per site.

Good questions

Questions about Structured data

It is typed JSON shaped to the schema you define. For a product page that might be name, price, currency and rating; for an article, title, author and published date. Every page maps to the same structure, so your downstream code stays simple.

Yes. ClawEngine renders the page first, so content injected by scripts is available to extract. It only works on public, permitted pages and respects robots.txt and Terms of Service.

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Stop wrangling raw HTML. Get LLM-ready data.

Point ClawEngine at a public page and one call crawls, renders the JavaScript and extracts clean markdown or typed JSON, ready for your RAG pipeline or AI agent. Public, permitted data only.

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Crawl · render JS · extract markdown & JSON · robots.txt respected, public data only