Bulma

Overview

Bulma is a free, open-source CSS framework built on Flexbox and Sass. It provides ready-to-use frontend components that developers combine to build responsive web interfaces without writing CSS.

The framework is designed mobile-first, uses modern CSS features like Flexbox, Grid, and CSS Variables, and does not include any JavaScript. This makes Bulma a CSS-only alternative to frameworks like Bootstrap and Tailwind CSS that integrate into any JavaScript environment.

Key Benefits

• 100% responsive out of the box with a mobile-first design approach
• CSS-only framework with no JavaScript included, so it imposes no JS opinions or dependencies
• Fully modular — use only the Sass components you need and leave out the rest
• Easy to customize by setting Sass variables before importing Bulma
• Free and open source on GitHub with no licensing costs
• Works with any JS framework including React, Vue, Svelte, Elixir Phoenix LiveView, and vanilla JavaScript

How It Works

You download Bulma or install it via npm, then include the bulma.css file in your HTML project. You compose pages by applying Bulma's CSS class names to HTML elements — for example, adding class="columns and class="column creates a responsive Flexbox grid that automatically resizes.

To customize the design, you set your own Sass variables (colors, fonts, spacing) in a Sass file before importing Bulma, then compile with Dart Sass. The result is a production-ready CSS file that matches your brand.

Use Cases

• Rails developers who need a frontend framework that integrates without fighting asset pipelines
• Elixir Phoenix LiveView developers building server-rendered interfaces with minimal JavaScript
• Freelance web developers prototyping responsive sites quickly from scratch
• Students and self-taught developers learning CSS layout with a low-friction, well-documented framework
• Frontend teams migrating from Bootstrap or Foundation who want a cleaner syntax and no JS opinions
• Ghost blog authors who want a minimal, design-focused CSS layer paired with a lightweight CMS

Why Choose This Product

Bulma is best suited for developers who want a CSS-only, class-based framework with readable syntax and no JavaScript lock-in. It integrates into any tech stack and is free for all use cases under an open-source license.