JSON-LD Structured Data (Schema.org) for OpenCart Products


Automatically inject valid schema.org Product JSON-LD markup into your OpenCart product pages — the format Google actually reads to display rich results in search: star ratings, price, availability, delivery time, and more.

1 hour of free support included with every purchase.

▸ Live Product Example
▸ Test in Google Rich Results Tool

Fixes Google Search Console Warnings

If your store shows warnings like these in Google Search Console → Shopping → Structured Data:

Missing field "shippingDetails" (in "offers")
Missing field "hasMerchantReturnPolicy" (in "offers")

This extension resolves both. Configure your shipping cost, free shipping threshold, handling and transit times, and return policy once — and the correct structured data is automatically added to every product page.

These warnings appear because Google expects merchants to declare shipping and return information inside product structured data. Without it, your products may be ineligible for enhanced shopping listings in Google Search.



Why Rich Snippets Matter for Your OpenCart Store

Google displays enhanced search results for products with valid structured data. Instead of a plain blue link, your OpenCart listings can show rating stars, review count, price, stock status, delivery estimate, and return policy — directly in search results, before anyone clicks.

The numbers speak for themselves:

Rich results achieve up to 30% higher click-through rate compared to standard listings
Websites with schema markup receive 4× more rich snippets than those without
Product schema delivers 4.2× higher Google Shopping visibility
Rich results attract more qualified traffic — visitors who already see your price and rating are more likely to buy

For OpenCart stores competing in crowded niches, structured data is one of the highest-ROI SEO investments available — no paid traffic, no redesign, just better signals to Google. Every product page without valid JSON-LD is a missed opportunity to outrank competitors who have it.

Official reference: Google Product Structured Data Guidelines

What's Included in the Markup

Product Name, Description & URL — core identification
BreadcrumbList — site navigation context for Google
Price & Availability — triggers price and stock display in rich results
Sale / Strikethrough Pricing — when a special price is active, both the sale price and original (crossed-out) price are declared using priceSpecification, matching Google's February 2025 format
Multiple Product Images — all additional product images are passed to Google, not just the main thumbnail
Aggregate Rating & Star Reviews — enables star ratings in search results, with bestRating correctly declared
Seller Information — store name added to the Offer block
Product Identifiers — SKU, MPN, ISBN, and smart GTIN detection: EAN / UPC / JAN values are automatically mapped to the correct gtin8, gtin12, gtin13, or gtin14 field based on digit count

Shipping Details (Fixes GSC Warning)

Adds a shippingDetails block to the Offer — the data Google needs to display delivery cost and estimated arrival times in search results.



Configurable from the admin panel:

Flat-rate shipping cost with currency
Free shipping threshold — when set, orders above the threshold are automatically marked as free shipping
Destination country (and optional region for US / AU / JP)
Handling time range (min / max days)
Transit time range (min / max days)

Return Policy (Fixes GSC Warning)

Adds a hasMerchantReturnPolicy block to the Offer — eliminates the most common Google Search Console structured data warning for OpenCart product pages.



Configurable from the admin panel:

Applicable country
Return window type: Finite (fixed days), Unlimited, No Returns, or Unspecified
Return method: By Mail, In Store, or At Kiosk
Return fees: Free Return, Original Shipping Fees, Restocking Fees, or Return Shipping Fees (with specific cost)
Refund type: Full Refund, Store Credit, or Exchange
Return label source: Downloadable, In the Box, or Not Provided
Item condition requirement (optional)

Setup & Compatibility

Install via Extension Installer — no core file edits required. Works through OpenCart's native event system.

✔ OpenCart 4.x
✔ Works with default OpenCart themes
✔ Designed to be theme-independent
✔ Custom theme adjustments provided free of charge if needed

Validate Your Pages

After installation, test any product page using Google's official tool:
Google Rich Results Test

Note: Adult-related products are not supported by this extension.



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