Free tool

Product JSON-LD field checker

Direct answer. Paste the Product JSON-LD from a product page (the contents of its application/ld+json script) or lines such as title: Merino Wool Beanie and gtin: 4006381333931. The page shows which fields that Google’s merchant listing documentation and Merchant Center product data specification list as required or recommended are present or missing, each with a question to check. It does not decide eligibility for any search feature or AI agent. It runs in your browser and sends nothing anywhere.

This is a reading aid, not what any app checks. To check llms.txt and robots.txt rules for GPTBot, ClaudeBot and PerplexityBot, audit Product JSON-LD and Open Graph completeness on live product pages, and review policy, shipping, tax, domain and product data in one readiness score, try Agentic Catalog by momiji (Shopify App Store).

Install Agentic Catalog by momiji

Paste your product JSON-LD or data

Product JSON-LD or product data

Install Agentic Catalog by momiji → JSON-LD and Open Graph audit

Where the checks come from

The rows follow Google Search Central’s merchant listing structured data documentation (Product: name, image and offers required; description, brand.name, gtin, mpn and sku recommended; Offer: price and priceCurrency required, price above zero for merchant listings; availability, itemCondition, shippingDetails and hasMerchantReturnPolicy recommended, with store-wide shipping and return policies suggested under Organization markup), Google Merchant Center’s product data specification (title up to 150 characters, brand for new products, valid GTIN check digits, MPN when there is no GTIN, no “N/A” or “Generic” brands) and the schema.org Product and Offer types.

The page reads one Product (or the first variant of a ProductGroup) from what you paste. It cannot see your live page, your feed settings or what Google or any AI agent actually does with the data, and requirements differ by country and product category. Read the guides on Product JSON-LD and Open Graph completeness and GTIN and barcodes for AI shopping.

Install Agentic Catalog by momiji on the Shopify App Store

What this page is not

Not legal advice and not a statement that a product is or is not eligible for any listing.
Not what Agentic Catalog by momiji matches or checks; the app is what counts.
Not a check of your live page, crawler rules or Merchant Center account, and not a promise that any search engine or AI agent will show the product.
Not a data collector: text you paste stays in this browser tab. Nothing is sent or stored.