JSON-LD in source
Inspect the signal in the rendered page.
Practical guide · Free in Chrome
How to Validate JSON-LD Added by JavaScript
Search Toolbox helps you prove which structured data exists in the final rendered document, directly on the live page. The goal is one rendered entity graph that matches the visible content and page type, without hiding the evidence behind one overall score.
developers and SEOs working with tag managers, React or headless CMSs
Learn SEO / GEO the practical way
Audit a page, tab by tab.
A guided route from first observation to verification. Open the lesson to learn the method, or jump to its tool and inspect the active page.
- Step 01
Open the page and establish the baseline
Start on the live URL and record the final URL, HTTP response and indexability.
- Step 02
Check Overview, metadata and canonical
Resolve noindex, title, description, robots and canonical conflicts first.
- Step 03
Audit headings, links and images
Read the hierarchy, follow internal anchors and fix repeated image-template errors.
- Step 04
Validate schema and entity relationships
Inspect the rendered JSON-LD graph, required properties and conflicting entities.
- Step 05
Verify hreflang and localized URLs
Test reciprocity, language codes, canonicals and HTTP status across the cluster.
- Step 06
Trace redirects and URL variants
Follow every hop and confirm the final URL is indexable and self-canonical.
- Step 07
Understand SSR, CSR and the rendering risk
Learn what the server sends, what JavaScript adds and which differences deserve investigation.
- Step 08
Investigate source HTML and rendered DOM if needed
Use this deeper check only when simpler panels reveal a JavaScript-related contradiction.
- Step 09
Prioritize, export, fix and retest
Turn evidence into an ordered plan, change one thing, then rerun the same checks.
What you can verify
Blocks added after render
Compare source code with the browser output.
Duplicate entity identifiers
Find contradictions that block indexation.
Visible content consistency
Export evidence your team can act on.
The observable problem
Client rendering can add the right block twice, remove it on navigation or leave stale product values.
The useful outcome
one rendered entity graph that matches the visible content and page type
The note written after the third coffee
“JavaScript can inject immaculate JSON-LD five seconds after the crawler has already left the room. “It appears on my laptop” is evidence, but not yet the closing argument.”
Evidence on the real page
validate JavaScript JSON-LD
A verifiable workflow, not a decorative score
Open the real page
Check the validate JavaScript JSON-LD in the real session, staging environment or localhost — preferably the troublesome page, not the perfectly groomed demo.
Inspect the evidence
Check json-ld in source, blocks added after render, duplicate entity identifiers, visible content consistency and connect signals that contradict each other.
Fix and retest
Aim for one rendered entity graph that matches the visible content and page type. 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 validate JavaScript JSON-LD, 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 validate JavaScript JSON-LD check?
It covers json-ld in source, blocks added after render, duplicate entity identifiers, visible content consistency to deliver one rendered entity graph that matches the visible content and page type.
Is the validate JavaScript JSON-LD free?
Manual checks for the validate JavaScript JSON-LD are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.
Does it work on staging and localhost?
Yes. The validate JavaScript JSON-LD check runs on the page you are viewing, including logged-in sessions and non-public environments.
Is it a full SEO crawler?
For the validate JavaScript JSON-LD, 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 validate JavaScript JSON-LD are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.