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Structured Data Extractor

Inventory JSON-LD, Microdata, and RDFa, then explore entities and relationships in a local report.

100% local processing: the entered HTML is neither sent, stored, nor executed.

1. Paste the markup to inspect

Use the HTML from the page, a fragment, or directly a JSON-LD object or array.

It is only used to resolve relative URLs found in Microdata. No network requests are made.
Limit: 1,000,000 characters, 500 entities, 5,000 properties, and 32 JSON levels.

3. Explore the extracted graph

Select an entity to examine its types, values, and outgoing relations.

JSON-LD

Organization

https://example.com/#organization
name
Exemple Studio
url
https://example.com

Detected types

Article1Organization1

4. Interpret the report correctly

JSON-LD, Microdata, RDFa

The three formats are inventoried. JSON-LD is generally the easiest to maintain, but the tool does not automatically convert one vocabulary into another.

Graph, not a simple table

Nested objects and identifiers become linked entities, which helps to spot an organization, author, or page described multiple times.

Extraction ≠ eligibility

A valid JSON can remain incomplete or misleading. Check the required properties of the relevant type and then test the published page with the official tools.

Source not executed

HTML is parsed in an inert document. Scripts, pixels, images, and links present in the source are not loaded by the tool.

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Extract and Understand Structured Data from a Page

Structured markup describes the entities on a page and their relationships. This extractor locally reads an HTML or JSON-LD document, gathers JSON-LD, Microdata, and RDFa into a common graph, and then produces a verifiable report without loading the page or executing its scripts.

Use Cases

  • Inventory a Page TemplatePaste the rendered HTML to identify declared types, duplicated blocks, and the potential coexistence of multiple markup formats.
  • Understand a JSON-LD GraphExpand @graph, nested objects, and @id references to see how a page, organization, author, or offer are connected.
  • Keep a Diagnostic ProofExport a normalized JSON containing entities, properties, relationships, formats, and diagnostics to compare two versions outside the tool.

Recommended Method

Prefer the actual rendered HTML over a template snippet when the markup is injected client-side. You can also directly paste a JSON-LD object or array to isolate a syntax error.

Provide the public URL as a base only if Microdata contains relative links. This value is used for their local resolution and does not trigger any requests.

First, fix invalid JSON, entities without types, and reached limits. Then check the required properties in the type-specific documentation, and test the published page with an official tool.

Parsed Formats

  • JSON-LDapplication/ld+json scripts, direct JSON documents, @graph, @id, @type, @value, @list, and nested objects are normalized without executing JavaScript.
  • Microdataitemscope, itemtype, itemid, and itemprop attributes are read with the usual value rules of HTML elements. itemref is noted but not developed.
  • RDFatypeof resources and their property, rel, or rev properties are inventoried. This is a practical diagnostic view, not a canonical RDFa 1.1 processor.

Limits and Security

  • The analysis is limited to 1,000,000 characters, 500 entities, 5,000 properties, 32 JSON levels, and 200 diagnostics to prevent a hostile source from permanently blocking the interface.
  • The parser works on an inert document: it does not download images, scripts, or pixels present in the HTML and does not send content to a server.
  • The tool does not apply the detailed requirements of each rich result and does not guarantee eligibility, display in results, or ranking.

Frequently Asked Questions

Which format should be prioritized?
Google supports JSON-LD, Microdata, and RDFa and generally recommends JSON-LD, which is easier to maintain without mixing markup with visible elements. The format should still be consistent with your publishing chain.
Does an error-free report guarantee a rich result?
No. A correct extraction only proves that the structure could be read. The content must represent the visible page, comply with general rules, and contain the required properties for the targeted Google functionality.
Can a URL be analyzed directly?
No. The tool does not crawl any site to preserve privacy and predictability. Copy the rendered HTML or the JSON-LD block from your development tools.

Visible Content Remains the Reference

Do not describe in structured data information that is absent or different from the page. A technically valid graph can still be misleading and lose its eligibility for search features.