JSON-LD syntax and types
Inspect the signal in the rendered page.
SEO tool · Free in Chrome
Schema Markup Checker for JSON-LD, Microdata and RDFa
Search Toolbox helps you validate the structured data that exists after the page finishes rendering, directly on the live page. The goal is a readable entity graph and the exact markup that needs correction, without hiding the evidence behind one overall score.
SEOs and developers debugging rich-result eligibility
What you can verify
Required and recommended properties
Compare source code with the browser output.
Duplicate or disconnected entities
Find contradictions that block indexation.
Source versus rendered schema
Export evidence your team can act on.
The observable problem
A CMS can say schema is enabled while the final graph is incomplete, duplicated or attached to the wrong entity.
The useful outcome
a readable entity graph and the exact markup that needs correction
Evidence on the real page
schema markup checker
A verifiable workflow, not a decorative score
Open the real page
Check the schema markup checker in the real session, staging environment or localhost — preferably the troublesome page, not the perfectly groomed demo.
Inspect the evidence
Check json-ld syntax and types, required and recommended properties, duplicate or disconnected entities, source versus rendered schema and connect signals that contradict each other.
Fix and retest
Aim for a readable entity graph and the exact markup that needs correction. Change one rule at a time, then repeat the exact same check so you know what actually moved.
What this page does not pretend to do
For the schema markup checker, Search Toolbox inspects the active URL deeply. It is not a full-site crawler, backlink platform or rank tracker. Test several URLs when the issue comes from a template.
Frequently asked questions
What does the schema markup checker check?
It covers json-ld syntax and types, required and recommended properties, duplicate or disconnected entities, source versus rendered schema to deliver a readable entity graph and the exact markup that needs correction.
Is the schema markup checker free?
Manual checks for the schema markup checker are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.
Does it work on staging and localhost?
Yes. The schema markup checker check runs on the page you are viewing, including logged-in sessions and non-public environments.
Is it a full SEO crawler?
For the schema markup checker, Search Toolbox inspects the active URL deeply. It is not a full-site crawler, backlink platform or rank tracker. Test several URLs when the issue comes from a template.
Verify it on your own page.
Manual checks for the schema markup checker are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.