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CSS to Tailwind CSS Converter

開発者文章

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入力

自動処理

出力

クライアント側

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ガイド

CSS to Tailwind CSS Converter

The CSS to Tailwind CSS Converter instantly transforms your vanilla CSS declarations into Tailwind utility classes. Paste any CSS code and get the equivalent Tailwind classes mapped automatically — no guesswork, no memorizing class names. The converter handles spacing, typography, colors, layout, flexbox, grid, borders, shadows, transitions, and more.

使い方

Paste your CSS code into the input area on the left. The converter processes each CSS declaration in real time and maps it to the closest matching Tailwind utility class. Results appear in the output panel on the right. Properties that have a direct Tailwind equivalent are converted automatically, while properties with no match are flagged with a warning. Click the Copy button to grab all the generated Tailwind classes at once.

特徴

リアルタイム変換 – CSS is parsed and converted to Tailwind classes as you type
Comprehensive Property Support – Handles margin, padding, width, height, font-size, font-weight, color, background, border, border-radius, display, flex, grid, position, text-align, opacity, box-shadow, transitions, and many more
Shorthand Expansion – Correctly handles multi-value shorthands like margin: 0 auto converting to mx-auto my-0
Design Token Matching – Rounds pixel and rem values to Tailwind’s design token scale (e.g., 16px becomes text-base)
Color Recognition – Maps common CSS color values to Tailwind’s color palette
Unmapped Property Warnings – Clearly flags CSS properties that have no direct Tailwind equivalent
ワンクリックコピー – Copy all generated Tailwind classes to your clipboard instantly
クライアントサイドのみ – All conversion happens in your browser with no server round-trip

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 よくある質問

What is Tailwind CSS and how does it differ from traditional CSS?

Tailwind CSS is a utility-first CSS framework that provides pre-built, single-purpose classes like p-4, text-center, and bg-blue-500. Instead of writing custom CSS rules in a separate stylesheet, you compose designs by applying utility classes directly in your HTML. This approach reduces context-switching between files and produces more consistent, maintainable designs compared to writing bespoke CSS.
Can all CSS properties be converted to Tailwind utility classes?

Not all CSS properties have a one-to-one Tailwind equivalent. Tailwind covers the most commonly used properties — spacing, typography, colors, layout, flexbox, grid, borders, and effects. Some advanced or niche properties like clip-path, mask, or complex animations may not have direct utility classes and require custom CSS or Tailwind plugins.
How does Tailwind handle responsive design compared to CSS media queries?

Tailwind uses responsive prefixes like sm:, md:, lg:, and xl: that map to mobile-first breakpoints. Instead of writing @media queries in a stylesheet, you add these prefixes directly to utility classes (e.g., md:flex means display: flex at the medium breakpoint and above). This approach keeps responsive logic co-located with the element it affects.
What is the utility-first approach and why is it popular?

The utility-first approach means building interfaces by combining small, single-purpose CSS classes rather than writing semantic class names with custom styles. It is popular because it eliminates naming fatigue, reduces unused CSS in production (with purging), makes refactoring safer since styles are scoped to the element, and provides a consistent design system through constrained design tokens.