UD5 Toolkit
CSS Reset Generator - Online Custom Normalize Snippet
Build a custom CSS reset by toggling which elements to normalize. Copy the resulting stylesheet. Lean and clean.
CSS Vendor Prefix Remover - Online Clean Legacy Code
CSS Vendor Prefix Remover
Drop legacy browser prefixes from your CSS in one click. Clean, modern code ready for production.
Input CSS
Cleaned CSS
When checked, all
-webkit-, -moz-, -ms-, and -o- prefixes are removed. Uncheck for a more conservative mode (keeps some necessary legacy rules).
Frequently Asked Questions
It scans your CSS code and removes outdated browser‑specific prefixes (
-webkit-, -moz-, -ms-, -o-) from property names and at-rules, leaving clean standard syntax behind. For example, -webkit-border-radius becomes border-radius.
Modern browsers support the standard properties fully. Keeping old prefixes bloats your stylesheets, makes maintenance harder, and can confuse new developers. Removing them reduces file size and helps you stick to current web standards.
The tool strips prefixes from CSS properties and at-rules that begin with -webkit-, -moz-, -ms-, and -o-. It also converts prefixed at-rules such as
@-webkit-keyframes to @keyframes, @-moz-document to @document, etc.
This version focuses on property/rule prefixes and does not automatically convert legacy value functions. For complex cases (e.g., flexbox, gradients), manual review is recommended. The conservative mode (uncheck “Remove all prefixes”) helps preserve some necessary legacy declarations.
Yes, in most cases. We advise you to test the cleaned CSS across your target browsers. Unsupported very old browsers may require some prefixes, but for modern web development, the output is safe and clean.
Autoprefixer adds prefixes based on browser support data — this tool removes them. Use Autoprefixer when you write pure CSS and want to support older browsers; use our prefix remover when you inherit legacy code and want to modernize it.
CSS Modules Class Name Generator - Online Scoped Styles
Write global CSS and auto‑generate unique, scoped class names with source maps. Understand CSS Modules naming.
Stylelint Config Generator - Online CSS Linter Setup
Set up Stylelint rules for your project by selecting extensions (SCSS, order, etc.). Output a valid .stylelintrc.
LESS to CSS Converter - Online Free Stylesheet Compiler
Compile LESS code to plain CSS in your browser. Check for syntax errors and get clean output. For legacy projects.
CSS Filter Visual Editor - Online Apply & Chain Filters
Add multiple CSS filters (grayscale, blur, hue‑rotate) to an image. See the combined effect. Copy the CSS filter value.
CSS UI Pattern Library - Online Copy‑Paste Components
Browse a collection of common UI components (cards, modals, navbars) built with pure CSS. Preview and copy the HTML/CSS. Fast prototyping.
CSS Font Stack Generator - Online Fallback Fonts
Build a complete font‑stack for your website. Choose a primary font and get the best fallback options for different OS. Copy the CSS.
CSS white‑space Property Demo - Online See Wrapping Behavior
Toggle between normal, nowrap, pre, pre‑wrap, and pre‑line to understand how whitespace is handled. Live text example.
SCSS to CSS Converter - Online Free Sass Compiler
Paste your SCSS or Sass code and compile it to standard CSS. Basic sass.js engine runs in your browser. No server.
CSS Unit Converter - Online PX, REM, EM, VW, % All in One
Convert any length between px, rem, em, vw, vh, %, and pt. Set base size for context. Ultimate frontend helper.
Online Code Minifier - JS & CSS Compression Tool
Minify JavaScript and CSS code to reduce file size for production. Remove whitespace and comments instantly. Run locally, your code stays private.
SCSS to CSS Converter - Online Free Sass Compiler
Compile SCSS code to CSS directly in the browser using the official Sass.js library. Supports variables, mixins, nesting. No server upload required.
font‑palette CSS Playground - Online Color Fonts Explorer
Pick a COLRv1 color font and change its palette with font‑palette. Create custom palettes with @font‑palette‑values.
CSS Button Styler - Online Pure CSS Effects
Design beautiful buttons with gradients, shadows, and hover/active effects. No JavaScript required. Copy the CSS.
Emoji to CSS Content Code - Online ::before Pseudo Generator
Pick an emoji and get the exact CSS content property value with escaped Unicode. For inserting emojis via CSS.
@scope CSS At‑Rule Playground - Online Scoped Styles
Write scoped CSS rules that apply only within a subtree. See the boundary limits and avoid naming conflicts. New browser feature.
REM to PX Converter - Online Root EM Unit Calculator
Convert REM values to pixels and vice versa based on your root font size. Essential for scalable web typography.
File Upload Button Styler - Online Custom Input File
Style the notoriously hard file input. Generate a consistent button with preview. Copy the HTML/CSS.
Text Transform Functions Playground - Online Preview CSS
Type text and instantly see it rendered with text‑transform: uppercase, lowercase, capitalize, and full‑width. Copy CSS.
Inline SVG Optimizer - Online Clean & Minify Embedded SVGs
Take a bloated inline SVG and clean it: remove unnecessary attributes, apply CSS shorthand. Smaller markup. Pure parser.
Custom Focus Ring Styler - Online CSS :focus‑visible Designer
Design a custom focus indicator with outline, offset, and box‑shadow. Preview on interactive elements. Copy the CSS.
Custom Scrollbar CSS Generator - Online Firefox & Webkit
Design a fully styled scrollbar with colors, width, radius, and hover effects. Supports both ::-webkit‑scrollbar and Firefox scrollbar‑width.
SVG Optimizer - Online Minify & Clean Vector File
Strip metadata, comments, and unnecessary precision from SVG files. Reduce file size. Pure browser SVG parser.
SVG to CSS Background - Online Inline Code Generator
Paste or upload an SVG and convert it into a CSS background‑image data URI. Clean and ready to embed.
SVG URI Encoder - Online Optimized for CSS Background
Paste an SVG and get an optimized, URL‑encoded data URI for use in CSS backgrounds. Reduces file size and escapes characters.
Code Syntax Highlighter - Online Beautiful Code Preview
Paste code and get a beautifully highlighted preview with line numbers. Supports many languages. Copy as HTML. Pure frontend.
SVG to CSS Mask Converter - Online Create Mask‑image
Convert an SVG into a data‑URI for mask‑image or mask‑position. Create non‑destructive clipping masks via CSS.
CSS Relative Color Syntax Playground - Online from a Base Color
Write CSS like `oklch(from red l c h)` to modify colors. Preview the output and copy. Modern color manipulation.
Text Decoration CSS Generator - Online Underline & Strike
Style underlines, overlines, and strike-throughs with colors, wavy styles, and thickness. Modern CSS text‑decoration.
CSS Transform Generator - Online Translate Rotate Scale Tool
Visually apply CSS transform functions like rotate, scale, skew, and translate. Obtain the exact CSS code for your elements. No coding needed.