UD5 Toolkit
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 Font Stack Generator - Online Fallback Fonts
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CSS Font Stack Generator
Build robust font-family stacks with intelligent fallbacks. Preview, customize, and copy ready-to-use CSS.
Popular Presets
Font Library
Your Font Stack
0 fonts + generic
Click fonts from the library or choose a preset above
Generic family:
Live Preview
32px
The quick brown fox jumps over the lazy dog.
CSS Output
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
Frequently Asked Questions
What is a CSS font stack?
A font stack is a list of fonts in the font-family CSS property, ordered by preference. The browser tries each font in sequence until it finds one installed on the user's system, ensuring text always renders—even if the preferred font is unavailable.
Why do I need fallback fonts?
Not all fonts are installed on every device. Without fallbacks, if your primary font is missing, the browser defaults to a generic font—which may ruin your design. A well-crafted stack preserves your typographic intent across platforms.
What are web-safe fonts?
Web-safe fonts are those commonly installed across most operating systems—like Arial, Georgia, Verdana, and Times New Roman. They're reliable fallbacks but limited in variety. Modern stacks often combine web-safe fonts with system-ui and Google Fonts for broader coverage.
What does system-ui mean?
The system-ui generic family tells the browser to use the operating system's native UI font—SF Pro on macOS/iOS, Segoe UI on Windows, Roboto on Android. It provides a native look and excellent performance since no font files need to be downloaded.
How many fallback fonts should I include?
Typically 3–5 fonts plus a generic family is ideal. Too few and you risk poor fallback; too many adds unnecessary CSS bloat. Focus on fonts with similar x-height and character width for seamless fallback transitions.
Should I use Google Fonts or system fonts?
It depends on your priorities. System fonts load instantly and feel native, while Google Fonts offer more creative choices but add HTTP requests and potentially impact performance. Many developers use Google Fonts as the primary with system font fallbacks.
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.
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.
Local Font Viewer & Preview - Online Test Styles
Browse the fonts installed on your system and type a custom phrase to see how it looks. Uses Local Font Access API where available.
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.
Text Decoration CSS Generator - Online Underline & Strike
Style underlines, overlines, and strike-throughs with colors, wavy styles, and thickness. Modern CSS text‑decoration.
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 Button Styler - Online Pure CSS Effects
Design beautiful buttons with gradients, shadows, and hover/active effects. No JavaScript required. Copy the CSS.
Stylelint Config Generator - Online CSS Linter Setup
Set up Stylelint rules for your project by selecting extensions (SCSS, order, etc.). Output a valid .stylelintrc.
Print CSS Generator - Online @media print Builder
Toggle common print styles: remove backgrounds, hide elements, set page margins, and add page breaks. Get the complete @media print block.
CSS Multi‑Column Layout Generator - Online Newspaper Style
Set column‑count, gap, and rule, and see a multi‑column text layout. Copy the minimal CSS. For magazine designs.
Default Wi‑Fi Password Calculator - Online ISP Router Keygen
Enter a router's MAC address or serial and generate the common default WPA passphrase for major ISP brands. Educational purpose only.
CSS Subgrid Layout Builder - Online Align Nested Grids
Design a layout where nested grids share track sizes with their parent via subgrid. Copy the complete CSS.
Shadcn/UI Theme Builder - Online Custom CSS Variables
Pick colors for the shadcn/ui design system and generate the complete CSS variable theme file. Copy into your project.
CSS Compatibility Linter - Online Check Browser Support
Paste your CSS and see warnings for properties that have limited browser support. Links to CanIUse. Modernize safely.
Text to Anki CSV - Online Flashcard Converter
Format a list of Q&A pairs and export as a CSV ready for Anki import. Simple line‑based template. Local.
Random Medieval Profession - Online RPG Background
Generate a random medieval occupation with a short description. For NPCs or historical curiosity. Local list.
Noir Plot Generator - Online Hardboiled Story
Generate a hardboiled film noir plot with a detective, a dame, and a McGuffin. Great for creative writing prompts.
Fancy Title Generator - Online Royal & Noble Names
Generate a grand, aristocratic title like 'Duke of Waffleshire'. Perfect for silly fun or RPG characters. Local.
CSS Glow Hover Effect - Online Animated Box Shadow
Design a button or card that glows on hover. Adjust shadow color, spread, and transition. Copy the CSS. Rich UI.
Font Fallback Checker - Online See Missing Glyphs
Type any character and see how it renders in different font stacks. Detect missing glyphs and fallback behavior.
CSS Letterpress Text Effect - Online Inset Typography
Create a realistic letterpress (debossed) text effect using CSS text‑shadow and background. Adjust depth and light direction. Copy code.
Random Dinosaur Name Generator - Online Prehistoric Fun
Generate a realistic‑sounding dinosaur name and see a fun description. Perfect for kids and writers.
Fuzzy Data Generator - Online Create Random Records
Generate random but realistic‑looking data arrays (users, products, orders) with typos and missing fields. For test robustness.
CSS Checkerboard Pattern - Online Background Generator
Create a customizable checkerboard or grid background using pure CSS gradients. Adjust cell size and colors. Copy the code.
CSS Progress Bar Generator - Online Animated & Styled
Create a custom HTML/CSS progress bar with percentage, colors, and animation. Copy the code. Modern UI element.
Resignation Letter Builder - Online Professional Generator
Fill in a few details and get a polished resignation letter. No data stored. Instant copy or print.
Text Outline Generator - Online Structured Hierarchical View
Paste plain text and turn it into a nested outline using indent levels or Markdown headings. Great for planning.
Image to CSS Grid Layout - Online Pixel‑Based Generator
Upload a small pixel art image and get a CSS grid layout that recreates it using divs. Novelty developer tool.
Text to Braille Image - Online Embossable PNG Generator
Convert short text into a black‑and‑white Braille bump image ready for embossing. Educational and inclusive.