Compare Stylesheets and Spot Visual Changes
Diff design system tokens, framework stylesheets, and component CSS side by side. Catch property changes and specificity issues before they break your UI.
Compare CSS NowCSS changes are uniquely dangerous because they affect visual output in ways that are hard to predict. A changed selector specificity, a removed media query, or an overridden custom property can break layouts across dozens of pages. Design system updates, framework migrations from Bootstrap to Tailwind, and theme refactoring all produce CSS diffs that need careful visual review. You need to see every selector, property, and value change clearly.
Why Design Teams Choose PowerDiff for CSS
Selector-Aware Diffs
CSS syntax highlighting distinguishes selectors, properties, values, and media queries. Spot a specificity change or overridden rule without reading raw text.
Design System Auditing
Compare design token files, theme stylesheets, and component CSS to catch drift between design specs and implementation.
Brand Assets Stay Private
Your design system, brand colors, and proprietary styling never leave the browser. Safe for comparing client deliverables and unreleased themes.
Framework Migration Clarity
Compare CSS output before and after a Tailwind config change, SCSS refactor, or PostCSS plugin update to verify the generated styles match expectations.
Frequently Asked Questions
Can PowerDiff compare SCSS or LESS files?
Yes. PowerDiff works with any CSS-like syntax including SCSS, LESS, and PostCSS. While syntax highlighting is optimized for standard CSS, preprocessor syntax is still clearly readable in the diff view.
Does it detect changes in CSS custom properties (variables)?
Yes. PowerDiff highlights every line-level change including CSS custom property definitions (--variable-name) and their usages via var(). This makes it easy to track design token changes across your stylesheet.
Can I compare compiled CSS output from different builds?
Absolutely. Paste the CSS output from two different builds to see what changed. This is useful for verifying that a Tailwind config change, PostCSS plugin update, or SCSS variable modification produced the expected CSS output.
Is my CSS kept private when comparing?
Yes. PowerDiff runs entirely in your browser. Your stylesheets, design tokens, and brand-specific CSS are never sent to any server.
Ready to Diff Your Stylesheets?
Paste your CSS and see every property change instantly.
Compare CSS Now