Tailwind Config Builder
Build tailwind.config.js visually with custom colors, spacing, fonts, and breakpoints. All processing runs client-side.
About This Tool
The Tailwind Config Builder is a free, browser-based tool that
helps you visually create and customize your tailwind.config.js
file without writing any code manually. Instead of remembering the
exact configuration syntax, you fill in form fields for colors,
spacing values, font families, and breakpoints, and the tool
generates a ready-to-use configuration file instantly.
You can choose between extend mode (which keeps all default Tailwind CSS values and adds your custom values on top) and override mode (which replaces defaults entirely so only your custom values are available). This distinction is one of the most commonly misunderstood parts of the Tailwind configuration, and the builder makes it clear with a single toggle.
The General tab lets you set the dark mode strategy (class or
media) and optionally add a class prefix to avoid conflicts
when integrating Tailwind into an existing project. Every change
you make is reflected in the output immediately, so you can
iterate rapidly.
All processing happens entirely in your browser. No data is sent
to any server and no account is required. Once you are satisfied
with your configuration, click Copy to put it on your
clipboard, or Download to save tailwind.config.js directly
to your machine.
This tool pairs well with the Tailwind CSS Playground for testing utility classes in real time, the Tailwind CSS Converter for migrating existing CSS to Tailwind, and the CSS Variable Generator for building design token systems that complement Tailwind themes.
How to Use
- Open the Colors tab and click Add Color to define custom theme colors. Enter a name (e.g.,
primary) and pick or type a HEX value. - Switch to the Spacing tab to add custom spacing values. Enter a key (e.g.,
72) and a CSS value (e.g.,18rem). - In the Fonts tab, add font families by specifying a name (e.g.,
sans) and a comma-separated list of font families. - Use the Breakpoints tab to define custom screen sizes such as
xs: 475pxor3xl: 1920px. - Go to the General tab to choose between Extend (add to defaults) or Override (replace defaults), set the dark mode strategy, and optionally add a class prefix.
- Review the generated
tailwind.config.jsin the output panel on the right (or below on mobile). - Click Copy or press Ctrl+Shift+C to copy the config to your clipboard. Click Download to save the file directly.
Popular Tailwind Config Guides
FAQ
Is my data safe when using this tool?
Yes. All processing runs entirely in your browser using JavaScript. No data is sent to any server. Your configuration is generated locally and never transmitted anywhere.
What is the difference between Extend and Override mode?
Extend mode adds your custom values on top of Tailwind's built-in defaults. For example, adding a 'primary' color keeps all existing Tailwind colors available. Override mode replaces defaults entirely, meaning only the values you define will be available in your project.
Does this support Tailwind CSS v4?
The generated config uses the module.exports format compatible with Tailwind CSS v2 and v3. For Tailwind v4, configuration has moved to CSS-based configuration. You can use the output as a reference when migrating to the new format.
Can I add color shades like blue-50, blue-100, blue-200?
You can add individual color values with any name, including shade names like 'blue-50' or nested objects by editing the generated output. The visual builder focuses on flat key-value color pairs for simplicity.
What does the class prefix do?
A prefix like 'tw-' prepends to all Tailwind utility class names. Instead of 'bg-blue-500' you would use 'tw-bg-blue-500'. This is useful when integrating Tailwind into a project that already has CSS class names that might conflict.
Should I use class or media for dark mode?
Use 'class' when you want manual control over dark mode (toggling via a button). Use 'media' when you want dark mode to automatically follow the user's operating system preference via the prefers-color-scheme media query.
Can I import an existing tailwind.config.js?
Currently the tool does not support importing an existing config file. You can manually enter your existing values into the form fields. Future updates may add import functionality.
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