How to Convert an AI Build into HubSpot Modules (Step-by-Step)

AI Build to HubSpot CMS

How to Convert an AI-Built Frontend into HubSpot Modules

An AI builder can hand you a polished component library in an afternoon. What it cannot hand you is something a marketer can edit. If your CRM, email and forms already live in HubSpot, the site belongs there too — and that means turning React components into native HubL modules.
 
HubSpot renders HubL on its own servers, and its CMS is built around modules a marketer can rearrange and personalise against CRM data without opening code. That design is exactly why a React build cannot be dropped in as-is, and it is the translation transjt automates. Here is the full path.
 

Before you start: the one stack requirement

Ask your AI tool for React with Vite, without server-side rendering. HubSpot renders HubL server-side, so a client-rendered frontend is what converts cleanly. Per tool:
 
  • Lovable already produces React with Vite, so there is usually nothing to change.
  • v0 defaults to the Next.js App Router with server components — ask for React and Vite instead.
  • bolt.new, Replit and Rocket scaffold a full stack by default. HubSpot already provides forms, contact records and content storage, so most of what they generate is redundant here.
  • Figma Make and builder.io generate React from a design, which is the input transjt expects.
  • Claude Code honours the constraint if you state it in the first prompt.

Check your subscription first

This is the one hard prerequisite, and it is worth confirming before any design work starts. Uploading a custom theme requires a Content Hub tier that permits custom coded files. Starter tiers restrict this. Beyond that, the output is a standard HubSpot theme with no special requirements.
 

Step 1: Build the frontend in your AI tool

Prompt and refine until the interface is right. The conversion does not ask you to change how you work, only to state the stack constraint early.
 

Step 2: Get the code into GitHub

GitHub is the bridge transjt reads from. Lovable and Replit sync automatically, bolt.new pushes from the editor, v0 and Figma Make export code you commit, and Claude Code is already working inside your repository. Whichever route you take, the commit history becomes a record of which design version produced which theme.
 

Step 3: Connect the repository to transjt

Authorize GitHub in your transjt project and select the repository. transjt reads the component tree and decides which parts become HubL templates and which become editable module fields — the distinction that determines what your marketing team can change later.
 

Step 4: Choose HubSpot and review the preview

Pick HubSpot as the target CMS and check the preview against your original design. Confirm, and transjt writes a native theme: HubL templates and modules with declared editable fields, which you upload through the design manager. The modules then appear in the page editor ready to build with.
 
From a synced repository, this typically completes in up to an hour depending on the number of pages.
 

What editable actually means

This is the difference between converting and embedding. Modules with defined fields let marketers change copy, images and section order in the drag-and-drop editor while spacing, type and colour stay exactly as designed. The design system holds precisely because it is encoded in the modules rather than described in a document.
 
It also unlocks the things that only work when a page is native HubSpot content: personalisation against lifecycle stage or any contact property, page-level reporting, attribution that reaches real deals, and A/B testing. An externally hosted React app gives you none of it without extra instrumentation.
 

Updating after you regenerate

Push updated components to the same repository and re-run transjt to sync the changes into your theme. You keep designing where you prefer to design, and HubSpot keeps serving the pages.
 

When this is the right approach

Convert when marketing already lives in HubSpot and the site sitting elsewhere means stitching two systems together forever; when every campaign page is currently a developer task; when you need personalisation driven by CRM data; or when nobody on the team has a reason to learn a templating language they will use once.
 
HubL is a specialist skill with no second use outside HubSpot. Automating that layer is the point: the expertise you would have had to hire for turns out not to be needed.