Themerson
Overview
Themerson is a visual compiler for WordPress block themes.
It allows designers and developers to configure a robust theme foundation—colors, fluid typography, and spacing scales—visually, without writing a single line of theme.json. It exports a native, installable WordPress Full-Site Editing (FSE) theme with no extra runtime and no vendor lock-in.
It is built for the kind of repeated setup work that slows down real WordPress production: translating design decisions into code, keeping foundations consistent, and avoiding the same technical decisions on every new project.
Why I’m building this
After years of building WordPress websites, I realized how much time is lost on repetitive technical tasks. I wanted a tool that handles the math and the boilerplate, generating standard WordPress code. This way, agencies, designers, and developers can skip the busywork and immediately start building layouts using the native Site Editor, instead of fighting proprietary page builders.
How it works
The workflow is designed to be simple and standard:
- Configure the foundation: Define your visual system in Themerson. The engine maps everything 1:1 to native WordPress core properties.
- Export a native theme: Download a clean, installable ZIP containing your
theme.json, styles, and templates. - Build natively: Install the theme on WordPress and build the website using the native Site Editor.
It’s not a page builder. It doesn’t change the native editing experience or ship proprietary runtime CSS. If you stop using Themerson, your theme keeps working without any dependencies.
Current Stage & What’s Next
The core engine that handles the mathematical generation of theme.json and fluid typography is actively being refined. The focus right now is on ensuring that the exported foundations are flawless and adhere perfectly to the latest WordPress FSE standards.
The next step is implementing more features like patterns, pages, cloud, and more, giving agencies, designers, and developers a tool they can rely on to build stronger WordPress FSE website foundations.