HubSpot Custom Module Development: A Guide to Building Flexible Sites

HubSpot Custom Module Development: A Guide to Building Flexible Sites

The "Drag-and-Drop" editor is the heart of HubSpot CMS. But for a marketing team to truly be successful, they need more than just standard buttons and image blocks. They need Custom Modules tailored to their specific brand and business needs.

At 2CUBE Studio, we don’t just build pages; we build a "Design System." Here is a deep dive into how custom modules work and why they are the secret to a scalable HubSpot website.

What is a HubSpot Custom Module?

Think of a custom module as a "Lego brick." It is a self-contained piece of code (HTML, CSS, JS, and HubL) that can be dragged into any page.

The magic happens in the Fields. We create easy-to-use inputs, like text boxes, image selectors, or color pickers—so your marketing team can update the content without ever seeing a single line of code.

The 3 Pillars of a Great Module

1. The HubL (HubSpot Markup Language)

HubL is the "brain" of the module. It tells HubSpot where to put the data the user types in. For example, if we create a "Team Member" module, HubL ensures the name, photo, and social links appear in exactly the right place every time.

2. The JSON Schema (fields.json)

This is where we define the user experience for your editors. At 2CUBE, we organize fields into logical groups. We use "repeater groups" so you can add 3, 5, or 10 features to a list simply by clicking a "plus" button.

3. Reusability & Performance

A badly coded module can slow down your site. We build modules that are "lean." We use scoped CSS so that the module’s styling doesn't interfere with the rest of your site, ensuring your design stays consistent no matter where you use it.

Why Custom Modules Save You Money

• No More Developer Requests: Once we build a "Pricing Table" or "Resource Slider" module, your team can use it on 100 different pages without ever calling us to edit the code.
• Consistent Branding: We hard-code your brand's fonts and colors into the modules, so your site stays "on-brand" even if different people are building pages.
• SEO Optimized: We build SEO best practices (like H-tags and alt-text fields) directly into the module's structure.

Ready to Level Up Your HubSpot CMS?

Standard modules are a starting point, but custom modules are where your brand truly shines. Whether you need a complex "Product Comparison" tool or a simple "Dynamic FAQ," we can build it.

Need a custom module built for your HubSpot theme? Contact 2CUBE Studio and let’s start building!