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Opencart 4.

OpenCart 4 (4.0 and 4.1) documentation, tutorials and free extensions: the complete user manual, the events system, OCMOD, extension and theme development, the API, GA4 and conversion tracking, Stripe payments, tax and VAT, security, speed and SEO. Try features first on the live OpenCart 4 demo store.

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Opencart 4

173 ARTICLES
Opencart extensions free download · 25 min read

Free Social Share Module for OpenCart 4: Share Buttons and Open Graph Tags Without Third-Party Scripts

A free OpenCart 4 extension that adds share buttons for 11 networks and the Open Graph tags that make shared links show the right…NOV 11, 2026 Opencart extensions free download · 10 min read

“Only 3 Left in Stock”: Add a Low-Stock Message to OpenCart 4 Product Pages (Free Extension)

A small OpenCart 4 extension that replaces the Availability text with "Only X left in stock" when a product's quantity drops below a threshold…NOV 11, 2026 Opencart extensions free download · 14 min read

Show Related Products Automatically by Category in OpenCart 4 (Free Extension, No Core Edits)

A small OpenCart 4 extension that fills the Related Products block with items from the product's own category whenever you haven't picked related products…NOV 11, 2026 OpenCart Tips and Tricks · 10 min read

Google Ads Enhanced Conversions for OpenCart 4: Purchase Tracking With First-Party Data, Consent Mode and a Server-Side Backup

Recover Google Ads purchases that cookies miss. Set up enhanced conversions in OpenCart 4: the purchase conversion tag with transaction_id, user_data from the order,…OCT 28, 2026 OpenCart Guide · 14 min read

Typo-Tolerant Product Search for OpenCart 4 With Meilisearch or Typesense: Indexing, Instant Results and a Safe Fallback

OpenCart's built-in search uses SQL LIKE, so "iphnoe" finds nothing. Add typo-tolerant, relevance-ranked product search to OpenCart 4.1 with Meilisearch (or Typesense): running the…OCT 28, 2026 Opencart 4 tutorial · 9 min read

Connect OpenCart 4 to Klaviyo: Onsite Tracking, Placed Order Events and the Flows That Earn Money (with Code)

Klaviyo has no official OpenCart integration. How to connect OpenCart 4 yourself: klaviyo.js and the klaviyo object, Viewed Product, Added to Cart and Started…OCT 28, 2026 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 · 8 min read

SMS and WhatsApp Order Notifications for OpenCart 4: Twilio, the WhatsApp Cloud API, Consent, 10DLC and 2026 Pricing

Send order confirmations, shipping and pickup updates from OpenCart 4 by SMS or WhatsApp. Which messages to send, consent and opt-out, US 10DLC registration,…OCT 28, 2026 Tools · 11 min read

Cloudflare OWASP Core Ruleset Explained: Anomaly Score Threshold, Paranoia Level, Action and Managed Rulesets (2026 Configuration Guide)

How Cloudflare's OWASP Core Ruleset works and how to configure it: what managed rulesets are and which plans get them, how the anomaly score…OCT 28, 2026 OpenCart Guide · 10 min read

Tax and VAT Setup in OpenCart 4: Geo Zones, Tax Classes, EU OSS, UK VAT and US Sales Tax Nexus (2026)

Set up taxes correctly in OpenCart 4.1: how geo zones, tax rates, tax classes and the tax address settings work together, destination VAT for…OCT 28, 2026 Opencart · 8 min read

Meta Conversions API for OpenCart 4: Server-Side Purchase Events, Deduplication With the Pixel, and Hashing Done Right

Browser-only Meta Pixel tracking misses purchases. Send Purchase events from the OpenCart 4 server with the Conversions API: capturing fbp and fbc at checkout,…OCT 26, 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 4 tutorial · 7 min read

AI Coding Tools for OpenCart Extension Development: Claude Code, Cursor and Copilot Setup, Prompts and a Review Checklist

Make Claude Code, Cursor and GitHub Copilot write OpenCart 4 extensions that follow OpenCart's conventions: one shared instruction file (CLAUDE.md, AGENTS.md, Cursor rules, copilot-instructions.md),…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