A High-Level Guide to HubSpot UI Extensions — and Why Templates Make All the Difference

HubSpot UI Extensions allow developers to bring custom functionality directly into the HubSpot interface. Whether you're looking to streamline workflows or integrate external tools, these extensions provide a powerful way to enhance the HubSpot experience without leaving the platform.

What Are HubSpot UI Extensions?

UI Extensions are custom-built interfaces created with React and embedded inside HubSpot. You can use them to extend contact records, deals, pipelines, and other core parts of the CRM.

• Enhance records with real-time external data
• Visualize process stages or KPIs
• Create embedded forms or automation triggers

Why Use UI Extensions in HubSpot?

• Stay within HubSpot: No more jumping between tools
• Access CRM data easily: Extensions use built-in context APIs
• Modern stack: Built with React, TypeScript, and serverless functions
• Faster user adoption: Seamless experiences improve usability

Why Templates Are the Smart Way to Build

Building an extension from scratch takes time—and often involves repeating the same setup steps. Templates give you a head start with:

• Preconfigured OAuth and API logic
• Best-practice React code and folder structure
• Error handling, loading states, and caching baked in

Use Cases for HubSpot UI Extensions

• Enrich contact records: Add social profiles, enrichment data
• Show external dashboards: Pull in weather, analytics, or finance data
• Create process indicators: Track deal progress or custom status

Types of HubSpot UI Extension Templates

• CRM Enhancers: Contact cards, property editors, deal progress trackers
• API Integrators: Twitter data, Slack actions, e-commerce summaries
• Custom Input Forms: Collect complex, industry-specific data

How to Get Started

Install the HubSpot CLI and scaffold your first project from a template:

# Install HubSpot CLI
npm install -g @hubspot/cli

# Create new project from template
hs create my-extension --template=ui-extension

# Navigate to project
cd my-extension

# Install dependencies
npm install

Best Practices

• Use React.memo and caching to improve performance
• Secure API keys with env variables
• Validate user input to avoid injection attacks

Conclusion

HubSpot UI Extensions unlock deep customization for your team, but starting from scratch can slow you down. With professional templates, you get a clear head start—complete with documentation, working code, and best practices baked in.

Key Takeaways

• HubSpot UI Extensions embed your tools directly into the CRM
• Templates save weeks of development time
• Modern stack: React, TypeScript, serverless, and OAuth
• Built-in best practices for performance, security, and UX

Start faster, build smarter—explore our ready-to-use HubSpot UI Extension templates.