UD5 Toolkit
Custom Range Slider CSS Generator - Online Styled Input
Style an `<input type='range'>` with custom track and thumb. Cross‑browser CSS. Preview and copy the code.
Native Accordion Generator - Online HTML & Summary
Native Accordion Generator
Build lightweight, JavaScript-free accordions with <details> and <summary>. Customize items, preview instantly, and copy clean HTML.
Items & Settings
Generated HTML
Live Preview
FAQ / Tips
It’s an accordion built with the
<details> and <summary> elements. It works without any JavaScript – browsers handle the toggle behavior natively.All modern browsers (Chrome, Firefox, Safari, Edge) fully support it. Internet Explorer does not, but can be polyfilled.
Yes, use
summary::-webkit-details-marker or list-style: none and add a custom pseudo-element (like the Font Awesome caret in the preview).The generated code wraps content in a
<div class="content"> and uses max-height transition to animate opening/closing smoothly.Yes, native elements provide keyboard interactivity and are recognized by screen readers. Always provide meaningful summary text.
Absolutely. The generated HTML is pure, lightweight markup that can be styled further with Bootstrap utility classes or custom CSS.
HTML Color Input Explorer - Online Native Picker & Events
Use <input type='color'> and see its change events and value in hex. Understand the native color picker. Quick demo.
Stepped Color Shade Generator - Online Tailwind‑Style Palette
Pick a base color and generate a full palette of 10 shades (50 to 900) like Tailwind CSS. Copy as hex or hsl.
CSS Grid Implicit Tracks Tester - Online Auto‑Rows & Columns
Add grid items beyond defined tracks and see how implicit rows/columns expand. Set sizes interactively. Master the grid.
HTML Color Names - Online Complete List with Hex & Preview
A complete, searchable list of all 140+ named HTML/CSS colors with their hex codes and color previews. Click to copy code. Essential web reference.
color() Display‑P3 Generator - Online Wide Gamut CSS
Pick a color in the Display‑P3 space and get the CSS color() function. See the difference from sRGB. For modern design.
Weather Stripping Selector – Online Gap Size to Material Guide
Match gap size around doors/windows to the correct type of weather stripping (foam, V-strip, door sweep). Save energy.
Named CSS Colors Explorer - Online Preview All 148
Grid of all 148 named CSS colors. Hover to see detail, click to copy the name or hex. Essential frontend reference.
CSS color‑mix() Function Playground - Online Tester
Dynamically blend two colors using the CSS color‑mix() function in different color spaces. Copy the exact CSS snippet. No JS required.
CSS Container Queries Playground - Online Test @container
Experiment with CSS container queries in a live editor. Resize the container and see styles change based on its width/height. Learn modern responsive.
Flexbox Froggy Simulator - Online Learn CSS Flexbox Game
A replica of the famous Flexbox Froggy game: solve alignment puzzles by writing CSS. Progress saved locally. Fun frontend learning.
CSS Variable Theme Switcher - Online Dark/Light Generator
Design a light and dark theme by picking colors for backgrounds, text, and links. Get the CSS for both themes. Local.
Website Color Theme Extractor - Online Grab Palette from CSS
Fetch a website's CSS and extract :root custom properties (‑‑color) to reveal its design token palette. For learning and inspiration.
Paper Snowflake Simulator - Online Fold & Cut Preview
Virtually fold a digital paper and cut out shapes to see a snowflake unfold. Experiment with designs before real scissors. Pure creative fun.
CSS Container Query Tester - Online @container Playground
Experiment with CSS container queries. Resize a container and see the styles change according to its size, not the viewport. Learn the new spec.
contrast‑color() Preview - Online Automatic Text Color
Test the upcoming contrast‑color() CSS function. Get white or black automatically for a given background. See it live.
accent‑color Tester - Online Form Control Styling
Set a custom accent color for checkboxes, radios, range, and progress. See the browser’s rendering. Copy the CSS.
Color Trend Inspector - Online Pick Year & See Palette
See the Pantone Colors of the Year and popular palettes from past years. Get hex codes. Design inspiration.
Random Name Picker - Online Wheel for Raffles & Giveaways
Enter a list of names and spin a wheel to pick a random winner. Remove picked names to avoid duplicates. Perfect for classrooms or contests.
Color Swatch to CSS - Online Palette to Variables
Paste a list of hex colors and generate CSS custom properties for them. Create your design token file instantly.
React Testing Library Skeleton - Online Test Boilerplate
Enter a component name and generate a complete RTL test file with render, screen, and common assertions. Fast testing setup.
Text to Color Palette - Online Emotion to Hex
Type a word like 'sunset' or 'calm' and generate a color palette inspired by that mood. Simple associative mapping.
Grid vs Flexbox Layout Tester - Online Choose the Right Tool
Build the same layout with both Grid and Flexbox side by side. See the code differences and visual results.
HSV Color Picker - Online Traditional Hue Wheel
Classic HSV color wheel with sliders. See hex, RGB, and HSL equivalents. Intuitive for artists. No server interaction.
HDR Color Preview - Online See Wide Gamut Colors
Test if your display supports HDR colors by rendering a gradient in Rec.2020 space. See what you're missing. Canvas based.
Word Scrambler - Online Letter Jumble Game Generator
Scramble letters of any word or sentence to create anagrams. Great for brain teasers and vocabulary games. Simple, fun, and client-side.
Tailwind Color Palette Viewer - Online See All 22 Palettes
Browse every Tailwind default color palette side by side. Click any shade to copy the hex or class. For rapid design.
Random Color Generator - Online Hex & RGB Palette
Generate single random colors or full palettes. Displays hex, RGB, and copy on click. Great for design inspiration.
Color Name to Hex - Online Official CSS Colors
Type a CSS color name like 'tomato' or 'mediumseagreen' and instantly get its hex code and preview. Complete named colors list.
CSS Color Extractor - Online Find All Hex in Stylesheet
Paste a stylesheet and extract every unique color (hex, rgb, hsl) into a palette. Swatches displayed. Copy as JSON.