Schema Markup Generator
Generate JSON-LD schema markup free for Person, Organization, Article, FAQ, Product, and more — fill in the...
Open toolFree structured data utility
Schema Markup Tester
Paste JSON-LD to check whether it parses, includes a Schema.org context and has a type. Get quick notes about common fields, right in your browser.
Your markup is checked in this browser and is not sent to a server.
Ready to check
Paste JSON-LD and choose “Check markup”.
How to use the Schema Markup Tester
- Paste your JSON-LD into the large text area (click Load sample first if you want to see the format).
- Click Check markup to parse it: the tool reports whether the JSON is valid, finds every @type, and flags issues like a missing @context or missing name/headline fields.
- Click Format JSON to tidy valid markup into readable, indented code you can review line by line.
- Fix the flagged issues, re-paste, and check again until no warnings remain — then confirm rich-result eligibility in Google's own Rich Results Test.
Why it matters
A single misplaced comma or bracket can silently invalidate every schema block on a page, wiping out eligibility for rich results and the structured signals AI search relies on. Because broken JSON-LD produces no visible error on the page, mistakes often sit unnoticed for months. A quick local syntax test catches parse errors, missing contexts, and absent types before markup ships — turning structured data from a hopeful guess into a verified asset.
Schema Markup Tester FAQs
Does valid JSON mean I will get a rich result?
No. Valid JSON only confirms the data parses correctly. Google separately checks that the markup matches visible page content, uses a supported schema type, and follows its feature guidelines — and it never guarantees a rich result. Use this tester for syntax, then Google's Rich Results Test for feature eligibility.
Is my markup sent to a server?
No. Parsing and the field checks run entirely in your browser. Your code never leaves your device, so you can test client markup, staging pages, and unpublished drafts without privacy concerns or a sign-in, and the check works offline once the page loads.
Which issues does the tester flag?
It reports JSON syntax errors with the parser's message, a @context that does not point to schema.org, missing @type declarations, and common completeness gaps — for example, Article, Organization, Person, Product, or Service blocks missing a name or headline. Anything beyond these basics, like Google's eligibility rules, needs Google's own testing tools.
How is this different from the schema markup generator?
The generator builds new JSON-LD from form fields, while the tester checks markup you already have — pasted from a CMS, a plugin, or hand-written code. Use the generator when creating schema from scratch and the tester when auditing existing pages, third-party plugins, or markup someone else wrote for you.
What this schema checker validates
This browser-based checker parses JSON and looks for common Schema.org fields such as @context and @type. It is a basic syntax and completeness aid, not Google's Rich Results Test. A page may have valid JSON-LD but still be ineligible for a search feature if its markup, visible content or page type does not meet Google's rules.
Common questions
Does valid JSON mean my page will get a rich result?
No. Valid JSON only confirms that the data can be parsed. Google checks whether the markup matches visible content and its feature guidelines, and does not guarantee a rich result.
Is my schema submitted to a server?
No. This tool checks the text in your browser. It does not fetch or publish the page for you.
Which Google result features can this test confirm?
It does not confirm eligibility for a Google feature. Use Google's Rich Results Test for supported rich result types and Search Console reports after publishing.