Validate, visualize, generate and convert structured data on your web page

isSemantic.net is a structured data testing tool that allows you to validate schema markup, rich snippets, Open Graph and Twitter Cards tags, visualize, generate and convert schema markup and structured data


Schema markup validator

Test and validate schema markup and structured data against Schema.org, Google, Twitter and Open graph and diagnose and fix issues with schema markup code and rich snippets

Check schema code


Schema markup generator

Create, edit and extend any schema markup or Schema.org example and Google rich snippet, Twitter Cards and Facebook Open Graph tags, as well as to search and browse Schema.org types list

Schema markup generator


RDF graph visualization

Visualize linked data as an RDF graph and analyze your web page from knowledge management and semantic web perspective (any RDF serializatoin format is supported, as well as RDF-star formats)

Visualize RDF graph


RDF converter

Convert schema markup to any RDF format that suits or is native to your technology environment, such as JSON-LD, Microdata, RDFa, RDF/XML, Turtle/N3, N-Triples and others, as well as RDF-star formats

Convert RDF

All in one structured data testing tool

isSemantic.net brings together in one place almost all features concerning the structured data: validator, generator, visualizer and converter. Many features allow you to inspect and analyze structured data from different perspectives and domains, starting from rich snippets, to visualizing RDF graph.

isSemantic.net's main features also have supplementary features. For example, validator also offers hierarchical visualization, generator offers Schema.org viewer and snippet import, visualizer offers triples datatable and tree visualization and so on.

This tool is useful if you wish to aproach structured data from a broad context, which is in a way one of the fundamental ideas of structured data - linking data from different domains.

How to validate rich snippets?

You can validate these types of rich snippets: Google rich snippets, Schema.org markup, Twitter Cards, Facebook Open Graph.

  • Go to Schema markup validator
  • Enter web page address and submit, or if you have a code, enter it into the form and submit.

How to create rich snippets?

You can create multiple rich snippets: Google rich snippets, Schema.org markup, Twitter Cards, Facebook Open Graph, from scratch or by selecting some of the examples.

  • Go to Schema markup generator
  • Select some of the examples of the type of rich snippet you wish to create.
  • You can search Schema.org types and select them. The form will be automatically populated.
  • You can enter your own snippet in the form, and the generator will fill it into an editable form.

How to convert RDF data?

You can convert RDF data to many serialization formats: JSON-LD, Microdata, TriG, RDF/XML, Turtle, N3, N-Triples, as well as RDF-star formats.

  • Go to RDF converter
  • Enter web page address and submit, or if you have a code, enter it into the form and submit.
  • The RDF converter tool can also auto-detect input format, if you don't know it.

How to visualize an RDF graph?

You can visualize RDF graph data triples as a directed graph.

  • Go to RDF visualizer
  • Enter web page address and submit, or if you have a code, enter it into the form and submit.
  • The RDF visualizer tool will also list triples in a subject-predicate-object table, as well as tree visualization