How to fix seo variant urls in sitemap on OpenCart

Steps for OpenCart

1. OpenCart does not include a built-in XML sitemap generator — you are likely using an extension. Go to Extensions → Extensions → choose type 'SEO' or search the extension list for your sitemap extension → Edit its settings.
2. In the sitemap extension settings, look for an option to exclude product option or variant query-parameter URLs and enable it.
3. Verify canonical tags: in your product.twig (or product.tpl in older versions) template, ensure a canonical tag is output pointing to the clean product URL without query parameters.
4. Regenerate the sitemap from the extension interface and resubmit in Google Search Console.

<link rel="canonical" href="https://www.yourstore.com/products/blue-t-shirt" />

What is seo variant urls in sitemap?

When shoppers choose a color, size, or other option on a product page, many ecommerce platforms generate a new URL with a query parameter — for example, `/products/blue-t-shirt?variant=12345`. These variant URLs display the same product page with slightly different state; they are not separate, standalone pages. An XML sitemap is a file you submit to Google that lists the pages you want indexed. If variant URLs appear in that sitemap alongside the main product URL, you are effectively telling Google that each variant is its own unique page — which it isn't.

Submitting variant URLs in your sitemap wastes Google's crawl budget — the limited time Googlebot spends on your site — on duplicate or near-duplicate content instead of discovering and re-indexing your real product and category pages. It signals to Google that you may have a thin-content or duplicate-content problem, which can suppress your organic rankings. Google may also split ranking signals (links, engagement data) across the variant URLs instead of concentrating them on the single canonical product URL, weakening your page authority. Cleaning this up focuses all SEO value on one authoritative URL per product and keeps your sitemap lean and trustworthy in Google's eyes.

See the complete Seo variant urls in sitemap guide for every platform and the full background.