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OpenCart Extensions, OpenCart Modules. Explore OpenCart extensions and modules for adding features, custom functionality, and third-party integrations to your store.

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Extensions

101 ARTICLES
Opencart extensions free download · 7 min read

Free Shipping Progress Bar for OpenCart 4: “Spend $12 More for Free Shipping” in the Cart, With Products That Close the Gap (Free Extension)

Raise average order value in OpenCart 4.1 with a free shipping progress bar in the cart page and mini-cart. It reads the Free Shipping…OCT 28, 2026 Opencart extensions free download · 6 min read

AI Alt Text for OpenCart Product Images: Describe Every Photo in Every Language With Claude (Free Extension)

OpenCart 4 uses the product name as the alt text of every product image. This free extension has Claude look at each image and…OCT 26, 2026 Opencart extensions free download · 6 min read

Get OpenCart Products Into ChatGPT and AI Shopping Agents: An OpenAI-Format Product Feed (Free Extension)

AI assistants now recommend products from merchant feeds. What changed in 2026 (ChatGPT shopping, the Agentic Commerce Protocol, Google's UCP), the fields the OpenAI…OCT 26, 2026 Opencart · 7 min read

Add an AI Shopping Assistant to OpenCart 4 That Searches Your Real Catalog (Free Extension Using Claude)

A chat assistant for OpenCart 4 that answers shoppers by searching your actual products with Claude tool use: no invented products or prices, read-only…OCT 26, 2026 Opencart extensions free download · 6 min read

Multi-Language SEO for OpenCart 4: hreflang, x-default, Canonical Tags and Duplicate Content (Free Extension)

OpenCart 4 serves every language at its own URL but tells Google nothing about how they relate. Add hreflang and x-default, fill in missing…OCT 26, 2026 OpenCart Guide · 7 min read

Google Merchant Center and Free Listings for OpenCart: Product Feed, GTINs, Shipping and the 2026 Merchant API Change

Get OpenCart products into Google Shopping's free listings: Merchant Center setup, the required feed attributes, GTIN and MPN in OpenCart 4.1's new product identifiers,…OCT 26, 2026 Opencart extensions free download · 6 min read

GA4 Ecommerce Tracking in OpenCart 4: view_item, add_to_cart, begin_checkout and purchase Without Editing Your Theme (Free Extension)

Send Google Analytics 4 ecommerce events from OpenCart 4.1: view_item_list, view_item, add_to_cart, view_cart, begin_checkout and purchase with items, value, tax and shipping. Free extension…OCT 26, 2026 Opencart extensions free download · 7 min read

Webhooks for OpenCart 4: Send New Orders, Status Changes and Customers to Slack, Zapier, n8n or Your ERP (Free Extension)

OpenCart 4 can't notify other systems when an order is placed. This free extension sends signed JSON webhooks (Standard Webhooks format) on order.created, order.status_changed…OCT 26, 2026 Opencart extensions free download · 7 min read

Loyalty in OpenCart 4: Reward Points That Add Themselves, and Wishlist Price-Drop and Back-in-Stock Emails (Free Extension)

Build a simple loyalty program with OpenCart 4's reward points, fix the manual step that stops points being credited, and turn wishlists into sales…OCT 26, 2026 Opencart · 7 min read

Build a Multi-Vendor Marketplace on OpenCart: What You Need, Extensions Compared, Commissions, Payouts and Tax Reporting

OpenCart has no built-in seller accounts. What a marketplace really needs, how the main OpenCart multi-vendor extensions compare, how to pay sellers with Stripe…OCT 26, 2026 Opencart extensions free download · 7 min read

Bulk Update Prices and Stock in OpenCart 4 with CSV: Export, Edit in Excel, Preview and Import (Free Extension)

Update hundreds of OpenCart 4 prices, quantities and statuses at once from a spreadsheet. Free extension: export to CSV, edit in Excel or Google…OCT 26, 2026 Opencart · 11 min read

Stripe in OpenCart 4: Checkout vs Payment Element, Webhooks and PCI Scope (with a Developer Walkthrough)

How to accept Stripe payments in OpenCart 4.1: hosted Checkout or embedded Payment Element, keeping card data off your server, verifying webhooks, zero-decimal currencies,…OCT 26, 2026 Opencart extensions free download · 10 min read

Back-in-Stock Notifications in OpenCart 4: Let Customers Ask to Be Emailed When a Product Returns (Free Extension)

OpenCart 4 shows "Out Of Stock" and stops there. Add a "Notify me when it's back" form, email waiting customers automatically when stock returns,…OCT 23, 2026 Opencart extensions free download · 10 min read

Automated Review Request Emails in OpenCart 4: Ask for a Review X Days After an Order Is Complete (Free Extension)

Most OpenCart stores have almost no product reviews because nobody asks. Send an automatic review request a few days after each order, with one-click…OCT 23, 2026 Opencart extensions free download · 9 min read

Serve WebP (and AVIF) Images in OpenCart 4 Automatically: Faster Pages Without Re-uploading Your Catalog (Free Extension)

OpenCart 4 resizes your product images but keeps them as JPEG and PNG. Serve WebP or AVIF versions automatically, cut image weight by more…OCT 23, 2026