Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Custom Colors
Custom Fonts
Custom Spacing
Custom Screens
Plugins
Generated Config
tailwind.config.js output.What format does the generated config use?
The output is a CommonJS module.exports format compatible with Tailwind CSS v3. For v4 ESM format, replace module.exports with export default.
How do I add shades of a color (e.g. 50–900)?
You can add each shade as a separate color entry with names like brand-50, brand-100, etc. Or define a color object directly in your config file for nested shades.
Can I add custom keyframes or animations?
This generator covers the most common config sections. For animations and keyframes, use the Tailwind Animation Generator tool.
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