CS-Cart 4.20.1 Release: Collapsible Admin Menu, PWA App, and AI-search Readiness

We’re happy to introduce CS-Cart 4.20.1 — a release focused on improving everyday work in the admin panel, supporting modern mobile shopping experiences, and helping stores stay ready for new trends like AI-powered search.

This update includes a smarter admin interface for smaller screens, a new Progressive Web App option, support of llms.txt to optimize your store for AI search, and multiple quality improvements across the platform.

Here’s what’s new in CS-Cart 4.20.1:

1. Collapsible Side Menu and Better Small-Screen UX

Over the past few years, we’ve updated the CS-Cart interface step by step: the admin panel, the vendor panel, and most recently the storefront with the Nova theme. These updates were mainly focused on visual improvements, and we didn’t aim to address every request or expectation all at once.

Now that all key interface areas have been visually refreshed, we’re moving into the next phase — improving the user experience within each of these areas. Version 4.20.1 marks the start of this phase, introducing targeted improvements that directly affect everyday usability.

This time, we’ve come back to the sidebar as it takes up too much space according to the feedback. This issue is especially noticeable on smaller screens and when working in a split-screen setup, with the admin dashboard open alongside other windows.

With CS-Cart 4.20.1, you can now collapse the admin side menu into a slim bar on the left. The menu becomes dropdown-based — you can still access any section instantly, while freeing more room for the workspace.

You get two menu modes and can switch between them whenever you want.

Extra improvements for small screens and multi-window work:

• The window can now be resized to a smaller width before product, order, and other list pages switch to the mobile view.
• In expanded mode, the menu becomes narrower on small screens.
• The right sidebar (search panel for products/orders/etc.) is now more compact and can auto-collapse to free up space.
• The collapsed sidebar button is now easier to notice and open.
• Additionaly, we fixed an issue where navigating to the admin panel from the storefront via the bottom panel could sometimes result in a 404 error. 

2. Protection From Accidental Feature Deletion

In CS-Cart, product attributes and attribute groups can be assigned to specific categories. This helps content managers and vendors work faster and more accurately: when editing a product, they see only the fields that are relevant to that product type. For example, a wine product shows attributes like grape variety and volume, while electronics display power or engine type. The product form stays clean and easy to understand, without unnecessary fields.

However, this approach has an important nuance. Imagine a common scenario: an administrator moves a product to another category or adjusts attribute settings. If the new category doesn’t support some of the previously assigned attributes, those attributes can disappear from the product—even though no one intended to remove them.

In CS-Cart 4.20.1, we added protection against such situations. If an action may lead to attribute removal, the system now shows a warning in advance, explaining what will happen and suggesting the next steps.

You’ll see warnings in cases like:

• Moving a product to a category where some features aren’t available
• Removing a category from a feature’s category list when products already use that feature
• Adding/removing a feature to/from a feature group (which changes category availability)

3. Progressive Web App (PWA): An Additional Way to Get a Mobile App for Your Website

A mobile app makes it easier for customers to shop and for you to sell more. With an app icon An app makes shopping on a smartphone more convenient: customers can open the store from an icon on their phone and complete orders faster. The key benefit is that it creates another touchpoint with the customer — they see your brand on their device and return to the store more often. In addition, the brand can gain presence in app stores.

CS-Cart already offers a native mobile app for both iOS and Android. It’s a standalone application tailored to each website, published in the app stores, and built on a separate codebase from the core CS-Cart platform. Native apps come with their own considerations, which can make the launch process more complex. To publish the app, you configure it in the CS-Cart admin panel using the Mobile App add-on and submit it to the support team, who handle the app store submission for you. Alternatively, you can release the app on your own. This requires access to the source code, developer accounts in the app stores, and a mobile developer on your team. It’s also important to plan your app store promotion so users can easily discover and install the app. Any new features unique to your website will need to be developed separately for the native application.

Version 4.20.1 introduces an alternative way to create an app for your website — Progressive Web App (PWA). It allows you to use the storefront itself as an app, without the need for development or publication in app stores. Users install the PWA directly from the browser, and it works almost the same as the website.

PWA runs on the existing theme and modules, so any changes on the site are immediately reflected in the “app.” There is no need to maintain a separate mobile interface or go through app store publishing. This is a fast and cost-effective way to get an app for your website.

Important: PWA does not replace the native app — it complements it. The introduction of PWA in version 4.20.1 doesn’t mean we are moving away from the native solution; these are two equally valid options designed for different goals.

• If you need a new marketing channel with presence in the App Store and Google Play, the native app is the right choice.
• If you prioritize fast launch and minimal maintenance costs, PWA is the better option.

Availability: Store Builder Ulitmate (or higher), Multi-Vendor Plus (or higher).

4. llms.txt Support: Preparing Your Store for AI Search

More and more people are discovering products and brands through AI tools, and search engines are increasingly displaying AI-generated answers. That’s why we are gradually adapting CS-Cart to modern search trends.

AI approaches content differently from traditional search engines: instead of simply indexing pages, it tries to understand which materials on a website are truly important and what they are about. As a result, SEO specialists are increasingly recommending the use of an llms.txt file — a text file that helps AI systems identify the most relevant content on a site.

You can use llms.txt in CS-Cart even without updating it: simply place the file in the website root, and AI systems will be able to read it. The only limitation of this manual approach is that the file will be shared across all storefronts.

In CS-Cart 4.20.1, we made working with llms.txt much easier:

• you can edit the file directly from the admin panel (Website → SEO → llms.txt), without accessing the file system;
• multi-store projects can set different llms.txt content for each storefront, allowing more precise descriptions for AI.

CS-Cart doesn’t generate llms.txt automatically because the standard is still evolving and the content always depends on your specific business goals. What we provide is a simple, flexible way to manage it without technical hassle.

Availability: Store Builder Ulitmate (or higher), Multi-Vendor Plus (or higher).

5. Other Important Improvements

• More vendors supported in PayPal Complete Payments (Multiparty). We significantly expanded the list of countries where vendors can connect their PayPal accounts. Previously supported vendor countries included: Australia, Canada, France, Italy, Spain, the UK, and the US. Newly added regions include: Austria, Belgium, Bulgaria, China, Cyprus, Czechia, Denmark, Estonia, Finland, Germany, Greece, Hong Kong, Hungary, Ireland, Japan, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Mexico, Netherlands, Norway, Poland, Portugal, Romania, Singapore, Slovakia, Slovenia, Sweden.
• Image resolution limits added. The maximum image side is now limited to 6000 pixels to reduce server load and prevent oversized uploads. You can change this limit in the config.local.php file located in the CS-Cart root directory:  $config[‘tweaks’][‘max_uploaded_image_dimension’] = 6000; 
• TinyMCE visual editor updated. A maintenance update to keep the editor stable, secure, and compatible with modern browsers.
• Nova Theme enhancements introduced. Fixed visual issues and refined interface elements based on user feedback. 
• Admin panel performance improved. The Users list now loads faster, especially on large databases. Search speed has increased significantly—by 2–3× on average, and up to 5× in some cases when searching for non-existent users.

CS-Cart 4.20.1: More Comfort, More Mobile Options, More Future-Ready SEO

With 4.20.1, we focused on what matters most for daily operations:

• a more handy admin experience on small screens
• a simple way to offer an app-like storefront via PWA
• better safety in catalog management
• better readiness for AI-driven content discovery

All these changesare available in CS-Cart 4.20.1.