What it does

A complete blog for OpenCart 4.1: posts, categories, tags and authors with SEO addresses per store and language, the OpenCart editor, featured images, products inside posts, related posts, a From the blog block on product pages, scheduled publishing in the shop time zone, Article and breadcrumb markup, an RSS feed, an XML sitemap and comments with moderation and spam protection. Imports the built-in OpenCart blog. No OCMOD.

What it changes for your store

A blog that sells. Write guides and news in the editor you already know, add the products you mention, and the post shows real product cards under the article while the product page links back to the post.
Know the limits. This version does not send e-mails (no comment notifications), has no threaded replies and no comment ratings. Tags and categories are flat (no sub-categories). OpenCart 4.1 only. Posts need a title in each language you use; a post is not shown in a language it has no text for.

Features

Content

Posts with categories, tags, a featured image, an excerpt, meta tags and an SEO address per store and language
Authors with a photo, job title, biography, a byline, an author box and an author page
Table of contents from your headings, reading time, featured posts, a view counter, search and pagination
Related posts chosen by hand or filled from the same category or tag
Layout modules for latest, popular or featured posts and for categories, placed with the layout editor
Import of the articles, topics, authors, tags and comments of OpenCart's built-in blog in one click

Shop integration

Choose products in the editor: product cards with price, tax, add to cart and wishlist under the post
A "From the blog" block on every product page that is featured in a post (a number you set, or off)

Search engines

Article and BreadcrumbList JSON-LD with author, dates, word count and publisher; canonical links; meta title and description
XML sitemap of posts, categories and authors; RSS 2.0 feed with a discovery link in every page head
Scheduled posts appear at the minute you set, in your shop time zone, without a cron job

Comments without the spam

Moderation queue with approve, spam and delete; optional automatic approval after a first approved comment
Hidden honeypot field, signed form token with a minimum fill time, rate limit per visitor, duplicate check, link limit
Comments are stored as plain text and escaped on output; the visitor address is stored only as a hash

Safe and fast

Post content is cleaned on save with an allowlist (no scripts, handlers or unsafe links); featured, author and category images only from your image folder (a post body may link to http(s) images)
Lists are cached and cleared by every change; list queries use indexes (the search box scans titles)
Events and a layout of its own: no OCMOD, no core edits. Uninstalling keeps your content; "Remove all data" deletes it on purpose

What you get

Download & installOne installer package (.ocmod.zip) for OpenCart 4.1.0.0 – 4.1.x. There is no OpenCart 3 edition. Download it from My licenses right after payment.
12 months of updates & supportNew versions and help for 12 months (24 or 36 months at checkout). After that the extension keeps working; renew anytime at 50%.
License for your storeOne production domain with all its subdomains; staging and local development hosts are free. How licensing works
30-day refundFull refund within 30 days of your first purchase, no reason needed. Refund policy
Tested buildsOpenCart 4.1.0.4. Tested on OpenCart 4.1.0.4.
Documentation & supportFull guide (Installation, Configuration, Usage, FAQ) on this page. Tickets from your account, first reply within 1 business day.

Compatibility

Blog Pro works with OpenCart 4.1.0.4.

We list the builds we install and test on. “Tested” means the test plan ran on that build; “Supported” means the build is inside the supported range.

Compatibility
Version	Range	Runs on	Status
OpenCart 4.1.0.x	4.1.0.0 – 4.1.0.4	PHP 8.1 – 8.3	Tested on 4.1.0.4

1.0.0

Nov 7, 2026

Latest

First release.

How do I install the extension?

Upload. Extensions > Installer: upload the .ocmod.zip. It is for OpenCart 4 (4.1.0.0 to 4.1.x).
Install and enable. Extensions > Extensions > Modules: install, open the settings and switch it on. Events register themselves; nothing is patched.
Enter the license key. Paste the key from My licenses. Subdomains, staging and local hosts are included; you have 14 days to do it.

The Documentation tab covers the settings and every screen.

Which OpenCart versions does it work with?

OpenCart 4.1.0.4. Tested on OpenCart 4.1.0.4. The Compatibility tab lists every version range.

Do the extensions change core files?

No. They work through OpenCart events and standard extension types (modules, order totals, themes). No core file edits, no OCMOD patches, no theme template edits, so OpenCart updates and other extensions keep working.

What does the license cover?

One production store domain with every subdomain (www, shop., staging.), plus local development hosts such as localhost, *.local and *.test. A store on another domain needs its own license; a second-store license is 40% off. You have 14 days after installing to enter the key. 12 months of updates and support are included; after that the extension keeps working and renewals are 50% off. How licensing works

Can I get a refund?

Yes. Ask for a full refund within 30 days of your first purchase, no reason needed: open a ticket or write to [email protected] with your order number. The money goes back to the card or bank account you paid with within 5 business days of approval. Refund policy

How do I get help?

Open a ticket from your account, so your license details are attached. We answer Monday to Friday: bug reports within 1 business day, how-to questions within 2. Support policy. Not a customer yet? Ask a pre-sales question.

11 more answers about setup and daily use in the Documentation tab.

Overview

A complete blog for OpenCart 4.1: posts, categories, tags and authors with SEO addresses, the OpenCart editor, featured images, products inside posts, related posts, comments with moderation and spam protection, scheduled publishing, an RSS feed, an XML sitemap and Article markup. It works in every store and language of your installation.

Posts, categories, tags, authors: each has its own page and SEO address per store and language. Authors get a byline, an author box and an author page
Rich editor and featured images: the editor that ships with OpenCart and the OpenCart image manager. Post content is cleaned when you save it: no scripts, no event handlers, no unsafe links
Shoppable posts: choose products in the editor and the post shows real product cards (price, tax, cart, wishlist) under the article. Product pages show the posts that feature them ("From the blog")
Related posts: chosen by hand, or filled automatically from the same category or tag
Search engines: Article and BreadcrumbList JSON-LD, canonical links, meta title and description per post, an XML sitemap and an RSS 2.0 feed with a discovery link in every page head
Table of contents and reading time: built from your H2 and H3 headings
Comments: moderation queue, honeypot, minimum fill time, rate limit per visitor, duplicate and link checks. Comments are stored as plain text and the visitor's address is stored only as a hash
Scheduled publishing: set a publish time in your shop time zone; the post appears at that minute without a cron job
Layout modules: "Posts" (latest, popular or featured, optionally one category) and "Categories" for any layout position
Fast: lists are cached and invalidated by every change; list queries use indexes (the search box scans titles)
Import the articles, topics and comments of OpenCart's built-in blog in one click
No OCMOD and no core file changes: OpenCart events and a layout of its own. OpenCart 4.1.0.x

Installation

Requirements: OpenCart 4.1.0.x, PHP 8.1 or newer. Back up your store first.

In the admin go to Extensions > Installer, upload kv_blog_pro.ocmod.zip and click Install on the new row.
Go to Extensions > Extensions, choose Modules in the type list and click the green Install button next to Blog Pro. Then do the same for the two layout modules Blog Pro: Posts and Blog Pro: Categories if you want them.
Click the pencil next to Blog Pro, switch Status on, save. A Blog entry appears in the admin menu (below Catalog).
Enter your licence key on the License tab (the extension also runs without a key for 14 days). Development hosts such as localhost and *.test work with any valid key.

The blog is at index.php?route=extension/kv_blog_pro/page/blog. With SEO URLs switched on it is at /blog or, when your store already uses that address for OpenCart's built-in blog, at /journal. Change it in Design > SEO URL (search for the route extension/kv_blog_pro/page/blog).

Updating

OpenCart 4 updates an extension by uninstalling and installing it again. Blog Pro keeps its data on uninstall: posts, comments, categories, authors, tags, SEO addresses, settings and the licence state stay in the database. Update steps: Extensions > Extensions > Modules > Uninstall, Extensions > Installer > Uninstall and Delete, upload the new zip, Install, and install the module again. Open the settings page once afterwards.

If you installed a release made before data-keeping updates existed, replace the folder extension/kv_blog_pro/ with the new files over FTP instead and open the settings page once.

Uninstalling and removing data

Uninstalling never deletes your content. To delete everything (posts, comments, authors, categories, tags, SEO addresses), use Blog > Settings > Remove all data and type DELETE. This also switches the module off and disables its events (the storefront keeps working); turn it on again in the settings to start with an empty blog.

Using it next to the built-in blog

OpenCart 4.1 includes a basic blog (CMS > Articles). Blog Pro does not change it. Use Blog > Settings > Import from the built-in blog to copy its articles, topics, tags and comments into Blog Pro, then stop linking to the built-in blog. Importing twice never creates duplicates.

Configuration

Open Blog > Settings.

General

Setting	What it does
Status	Switches the blog on or off for visitors. The admin keeps working
Blog title and description	Per language. Used for the heading, the page title and the RSS feed
Posts per page	List size of the blog, category, tag, author and search pages (default 9)
RSS feed	Publishes the feed and the discovery link in every page head
Cache storefront lists	Keeps lists in the OpenCart cache. Every change in the admin clears it (a newly approved comment only refreshes the comments of its post). Search results are never cached and carry noindex. A scheduled post still appears at its minute

The page also shows the public addresses of the blog, the RSS feed and the XML sitemap. Add the sitemap address to Google Search Console or your robots.txt.

Display

Excerpt length, author, reading time, table of contents (shown from three headings), view counter, the number of related posts under a post and the number of posts on a product page (0 switches the product page block off).

Comments

Setting	What it does
Comments	Switch comments on or off everywhere. Single posts can also close their comments
Guests may comment	Off: only signed-in customers
Moderation	Hold every comment, approve automatically after a first approved comment from the same signed-in customer (guests: the same e-mail, name and address), or publish immediately. The spam checks always apply
Comments per visitor in 10 minutes	Rate limit by a hashed address; every attempt counts, including those caught by the hidden field, and one form token can send at most two comments. Behind a proxy or CDN that does not pass the visitor address to PHP (REMOTE_ADDR), all visitors share one limit: enable real-IP forwarding on the server
Minimum seconds to fill the form	Faster submissions are refused
Links allowed	More links than this and the comment is filed as spam
Maximum length	Characters

Scheduling and time zones

Publish times are shop times (System > Settings > Option > Timezone). A published post with a time in the future is shown as Scheduled and goes live at that minute. No cron job is needed.

SEO addresses

Every post, category and author has an SEO keyword field per store and language. Leave it empty and Blog Pro creates one from the title. A keyword already used by something else is refused. The blog home, the feed and the sitemap have their own keywords in Design > SEO URL.

Layout modules

Add Blog Pro: Posts (source: latest, popular or featured; optional category; limit; images) and Blog Pro: Categories under Extensions > Modules, then place them in Design > Layouts. The layout called Blog is used by every blog page in every store (it is created for each store when you install or save the settings).

Usage

Write a post

Blog > Posts > Add. One tab per language:

General: title, content (the OpenCart editor), excerpt (made from the content when empty) and tags per language. Separate tags with commas
Data: featured image, author, categories, stores, publish time, status, featured and comments on or off
Links: products shown under the article, and related posts chosen by hand (otherwise posts of the same category or tag are used)
SEO: meta title, meta description, meta keywords and the SEO keyword per store and language

Set the Publish at time and keep the status on to schedule a post. Content is cleaned when you save: scripts, event handlers, forms, unknown tags and links that are not http, https, mailto or tel are removed. YouTube and Vimeo embeds are kept.

Categories, authors and tags

Blog > Categories and Blog > Authors work like posts: name, description, image, SEO keyword per store and language. Tags are created from the tags field of a post and get an SEO address automatically.

Moderate comments

Blog > Comments lists every comment with a status filter. Select rows and click Approve, Mark as spam or Delete selected. The menu shows how many comments wait.

For visitors

The blog page lists posts as cards with search and pagination. A post shows its categories, byline, reading time, a table of contents, the content, tags, the author box, products, related posts and comments. Product pages show "From the blog" when posts feature the product.

Import from the built-in blog

Blog > Settings > Import from the built-in blog copies articles (with their author names, tags and images), topics (as categories) and comments. The built-in blog is not changed. Imported items get new SEO keywords (the built-in blog keeps its own, so both serve the text until you hide the built-in one). Reply threads of the built-in comments become flat comments; use the SEO Suite redirects or your web server to forward old addresses.

FAQ

OpenCart 4.1 already has a blog. Why Blog Pro?

The built-in blog has articles, topics and comments. Blog Pro adds authors with pages and author boxes, tags, products inside posts, related posts, posts on product pages, scheduled publishing, Article and breadcrumb markup, an RSS feed, an XML sitemap, a table of contents, reading time, layout modules, spam protection for comments and an import of your existing articles.

Which versions does it support?

OpenCart 4.1.0.x (tested on 4.1.0.4), PHP 8.1 or newer. There is no OpenCart 3 edition.

Why does the blog start at /journal and not /blog?

OpenCart's built-in blog already owns the address blog. Blog Pro picks the first free keyword. Change it in Design > SEO URL. The keyword is chosen per language: a language whose blog address is free uses /blog, another one may use /journal.

Is a visitor's comment safe to display?

Comments are stored as plain text (tags are stripped) and escaped when shown. Names too. The e-mail address is never shown.

What spam protection is included?

A hidden field that real visitors never fill, a signed form token with a minimum fill time, a rate limit per visitor (hidden-field hits count too), duplicate detection per post and visitor, a link limit and optional moderation. Visitor addresses are stored only as a hash.

Does a scheduled post need a cron job?

No. Lists compare the publish time with the shop time on every request, and the cache expires at the minute the next post goes live.

Does it work with several stores and languages?

Yes. Posts, categories and authors choose their stores; texts and SEO keywords exist per language. Posts without text in the current language are not shown in it.

Can I use my own theme?

Yes. The pages use the standard OpenCart layout (breadcrumb, columns, content) and Bootstrap classes. The stylesheet catalog/view/stylesheet/kvblog.css uses Bootstrap colour variables and is easy to override.

What happens to my data when I uninstall or update?

Nothing is deleted. Use Remove all data in the settings to delete it on purpose.

Does it send e-mails?

No. Comment notifications are not sent in this version.

What does it do to the product page?

An event adds a "From the blog" block under the product details when posts feature the product. Set the number to 0 to switch it off.