Quick Comparison
| Tailwind CSS | CSS Modules | |
|---|---|---|
| Approach | Utility classes in HTML | Scoped CSS files |
| Bundle size | Small (purges unused) | Depends on your CSS |
| Learning curve | Learn the class names | Just CSS |
| Customization | tailwind.config.js | Standard CSS |
| Design consistency | Built-in design system | You build your own |
When to Use Tailwind
- You want rapid prototyping
- You like seeing styles right in the markup
- You want a built-in design system (spacing, colors, breakpoints)
- You’re building a component-based app
When to Use CSS Modules
- You prefer separation of concerns (CSS separate from HTML)
- You want full CSS power (animations, complex selectors)
- Your team is strong in CSS
- You’re working on a design-heavy project
Key Differences
Workflow: Tailwind means you rarely leave your component file — styles are right there. CSS Modules means switching between component and CSS files.
Reusability: Tailwind reuses utility classes. CSS Modules reuses CSS classes. With Tailwind, you extract components. With CSS Modules, you extract CSS classes.
Bundle: Tailwind purges unused classes automatically, resulting in tiny CSS bundles. CSS Modules ship whatever you write.
Verdict
Tailwind for speed and consistency. CSS Modules for full CSS control. Most teams in 2026 are choosing Tailwind, but CSS Modules is a perfectly valid choice.