Schema Markup Validator
Schema Markup Validator is a Firefox extension that scans pages for existing JSON-LD and validates it against Schema.org rules. It can generate structured data using OpenAI or Anthropic models and links to external validators for final checks.
Overview
8 featuresSchema Markup Validator is a Structured data & machine readability project. It focuses on validating and creating accurate Schema.org markup without manually inspecting pages or writing JSON-LD. It is built as a B2B product for SEO professionals, web developers, and site owners. It is available for free. It ships for the web and embeddable surfaces.
Behind Schema Markup Validator is georgeneveu, and it first shipped in 2026. Among its 8 catalogued features are JSON-LD validation, deep page scan, and schema generation. The interface is available in 32 languages, including Czech, German, and Greek. It exposes integrations via a public API.
Summary written by a language model from the project’s public pages.
- JSON-LD validation
- Deep page scan
- Schema generation
- OpenAI support
- Claude support
- External validators
- Offline validation
- API key storage
Built with & integrations
- openai
- .openai in the HTML · bgpt- in the HTML
- anthropic
- .anthropic in the HTML · bclaude in the HTML
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
- Indexed15 Sep · 08:58 UTCSchema Markup Validator verified via Firefox Add-onsSource: Firefox Add-ons · Open
Frequently asked questions about Schema Markup Validator
- What is Schema Markup Validator?
- Schema Markup Validator focuses on validating and creating accurate Schema.org markup without manually inspecting pages or writing JSON-LD. It is catalogued under Structured data & machine readability on PulseGate.
- Who should use Schema Markup Validator?
- Schema Markup Validator is a B2B product built for SEO professionals, web developers, and site owners.
- Does Schema Markup Validator have a free plan?
- Yes — Schema Markup Validator is free to use.
- What platforms does Schema Markup Validator run on?
- Schema Markup Validator runs on the web and embeddable surfaces.
- Is Schema Markup Validator still active?
- Unverified. Schema Markup Validator has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- What projects are similar to Schema Markup Validator?
- Similar projects tracked by PulseGate include Schema M12, Free Schema Validator, and JSON-LD Schema Extractor.Schema M12Free Schema ValidatorJSON-LD Schema Extractor
- Who develops Schema Markup Validator?
- Schema Markup Validator is developed by georgeneveu.
- How long has Schema Markup Validator been around?
- Schema Markup Validator first shipped in 2026.
Similar projects
Closest matches by what these projects do