Schema.org Product Markup Generator
Free schema.org product markup generator that turns product attributes into valid Product JSON-LD in your browser. No login, no upload, instant output.
This schema.org product markup generator turns your product attributes — title, brand, GTIN/MPN, price, availability, and ratings — into valid Product JSON-LD that search engines and AI answer engines can parse. Paste in one product or a row of fields and copy structured markup you can drop straight into a page template.
Schema.org Product Markup Generator
The interactive version of this tool is coming soon. It will run entirely in your browser — no login, no upload limits.
Planned tool: schema.org product markup generator
Need this now? Talk to ClaroWhat it checks
The generator builds a Product object and validates the inputs as you fill them in. Specifically, it:
- Maps your fields to the correct Schema.org properties —
name,brand,sku,gtin/gtin13/mpn,description,image,category, andadditionalPropertyfor spec attributes. - Builds a nested
offersblock withprice,priceCurrency(ISO 4217),availability(anItemAvailabilityURL such asInStockorOutOfStock), and optionalpriceValidUntil. - Constructs
aggregateRatingandreviewonly when you supply a rating value and a review count, so you never emit ratings markup with no underlying data. - Flags missing recommended properties that AI search and rich results lean on — for example a product with a price but no
availability, or no image URL. - Validates identifier formats — checks that a GTIN is 8, 12, 13, or 14 digits and warns when both
gtinandmpnare absent, since AI agents use those to match a SKU to a canonical product. - Outputs ready-to-paste JSON-LD wrapped in a
<script type="application/ld+json">tag, plus a plain-language summary of what each block does.
How the markup generator works
Schema.org Product is the shared vocabulary that Google, Bing, and large language model answer engines read to understand a product page. JSON-LD is the recommended serialization: a single JSON block in the page <head> or <body> that describes the product independently of your visible HTML. A vague title like “Heavy Duty Pump 2HP” is hard to disambiguate, but Product markup with a brand, an mpn, and structured additionalProperty entries (flow rate, voltage, port size) gives a machine an unambiguous record.
The same pattern applies across categories. A CPG item carries a gtin13 and net weight, an industrial MRO part carries an mpn and material spec, a furniture SKU carries dimensions and finish, and each maps cleanly onto Product plus offers. The generator follows the published Schema.org property names and Google’s documented recommendations for product structured data — it does not invent properties or guess at values you have not entered.
Generating markup for one product is straightforward. Generating it correctly across tens of thousands of SKUs — where missing GTINs, inconsistent units, and stale availability quietly break the markup — is a data problem, not a templating one. That is where a canonical product-data layer matters: Claro’s AI search and GEO capability keeps the underlying attributes complete, deduplicated, and validated so the markup your templates emit is accurate at scale.
Related resources
Glossary
What Is Schema.org Product Structured Data?
The vocabulary behind this tool and why AI answer engines depend on it.
Tool
Schema.org Product Markup Validator
Already have markup? Check existing JSON-LD for errors and missing recommended fields.
Playbook
Generate Schema.org Product Markup at Scale
Move from one-off generation to automated, template-driven markup across your full catalog.
Guide
Product Data Requirements for AI Search Visibility
What attributes AI search engines need before they will cite your products.
Tool
Product Data Completeness Scorer
Score how complete your attributes are before you generate markup from them.
FAQ
What is Schema.org Product markup?
Schema.org Product markup is structured data that describes a product — its name, brand, identifiers, price, and availability — using a shared vocabulary that search engines and AI answer engines understand. It is most commonly added as JSON-LD, a single script block on the product page that lets machines read the product as a record rather than guessing from page text.
Do I need GTIN or MPN in my product markup?
They are strongly recommended whenever a global identifier exists. A GTIN (the number encoded in a UPC or EAN barcode) or manufacturer part number lets engines match your listing to a canonical product across the web, which improves both rich result eligibility and how reliably AI agents can cite your specific SKU. For unbranded or custom items without a GTIN, supply brand plus mpn instead.
Is JSON-LD or Microdata better for product markup?
JSON-LD is the format Google explicitly recommends and the one this generator outputs. It lives in a self-contained script block, so it does not entangle structured data with your visible HTML and is far easier to template and maintain across a large catalog. Microdata and RDFa are still valid Schema.org syntaxes but are harder to keep correct at scale.
Why does my generated markup show a warning about availability?
The offers block should include an availability value — a Schema.org ItemAvailability URL such as InStock, OutOfStock, or PreOrder. If you enter a price but no availability, AI search and rich results may treat the offer as incomplete or stale. The generator flags this so you can supply current stock status before publishing.
Does adding Product markup guarantee rich results or AI citations?
No. Valid markup makes a product eligible for rich results and easier for AI engines to parse and cite, but eligibility is not a guarantee — engines apply their own ranking and quality criteria. Accurate, complete underlying data and a clean feed matter just as much as the markup syntax itself.