!important in Layers Tester - Online Cascade Behavior
Understand how !important behaves inside @layer vs unlayered styles. Interactive example. Avoid common pitfalls.
UD5 Toolkit
Explore how transform-style: preserve-3d works in CSS 3D nesting.
preserve-3d and flat to see the difference.
flat), all children appear as if projected onto the parent's 2D surface.will-change: transform on the parent can help.perspective property set (usually on an ancestor) and that the element itself has transform-style: preserve-3d. Also ensure that all intermediate ancestors don't reset the 3D context.Understand how !important behaves inside @layer vs unlayered styles. Interactive example. Avoid common pitfalls.
Define multiple @layer blocks and see which styles win. Understand layer order and revert‑layer. Modern CSS architecture.
See how grid-auto-flow: row vs column changes item placement. Add and remove items to understand the algorithm. Visual.
Create glowing, neon‑style text effects with multiple text‑shadows. Adjust colors and intensity. Copy the CSS.
Apply the drop‑shadow() filter and compare it with box‑shadow. See how it follows the contour of transparent images. Copy code.
Transform regular text into the mocking SpongeBob‑style alternating case. Copy and paste for hilarious effect.
Paste a CSS rule and sort its declarations alphabetically or by box model grouping. Clean up styles.
Set up first‑line indentation and hanging punctuation. See how they affect reading flow. Copy the CSS.
Paste plain text and turn it into a nested outline using indent levels or Markdown headings. Great for planning.
Enter two names and get a whimsical compatibility score based on vowels, length, etc. Just for fun.
Enter text and see each character's 8‑bit binary laid out in a black‑and‑white grid. Beautiful data art. Local.
Paste your CSS and sort the properties of each rule alphabetically or by concentric groups. Keep your stylesheets consistent without a build step.
Add, remove, push, pop items and watch the data structure change visually. Supports arrays, stacks, and queues. For CS students.
See the complete recursion tree for small Fibonacci or factorial calculations. Understand overlapping subproblems. Educational.
Generate a checklist for traveling with only a carry‑on. Mix‑and‑match outfits. Toiletries rules.
Set tab‑size to any number and see how tabs are displayed in a pre element. Essential for code snippets.
Shrink a PDF file size with configurable image quality and object removal. All processing stays in your browser.
Choose tabular‑nums, diagonal‑fractions, ordinal and see the effect on a numeric list. Elegant data presentation.
Adjust page characteristics (image size, server delay, layout shift) and see the simulated Core Web Vitals scores. Understand what impacts performance.
Create a customizable scrolling marquee banner. Copy the HTML and CSS. For retro web projects or fun.
Obfuscate CSS by mangling class names and removing whitespace for production. Use with caution and export a mapping file to keep references intact.
Easily format, validate, and beautify XML documents. Minify XML data with a single click. All processing happens locally in your browser for maximum privacy.
Plot different Big‑O complexities on a chart. See how O(log n) stays flat while O(2^n) explodes. Educational reference.
Use browser compass and geolocation to show which planets and stars are overhead. Minimal, local only.
Watch classic sorting algorithms step through a randomized bar chart. Adjust speed and array size. Great for learning algorithm efficiency.
Enter a URL and get a quick simulation of First Contentful Paint, LCP, and CLS using browser metrics. Lightweight alternative.
Type a simple sentence and see a rudimentary Reed‑Kellogg diagram. Educational.
Paste lines and convert them into bulleted lists with symbols like •, ‑, or →. Markdown friendly. Quick formatting.
Common tools for solving mystery caches: base conversions, ciphers, coordinate format converter.
Apply dyslexia‑friendly fonts, spacing, and background to any text. Preview and copy the formatted version. Improve readability.