Generator Tools
CSS Font Stack Generator
Generate CSS system font stacks for sans, serif, and monospace. Tailwind v3/v4 defaults, Apple, Segoe UI, Roboto stacks. Live preview, copy CSS or Tailwind.
Filter stacks
Narrow the list to a single CSS generic family.
Choose a stack
Today's go-to stack: system-ui first, then named fallbacks for every major OS, then emoji fonts so emoji render in body text.
Optional preferred font
Prepend a brand font, web font, or Google Font name to the stack.
Leave blank for the system stack alone. Quotes and surrounding whitespace are cleaned automatically.
Stack contents
- system-uiGeneric
- -apple-systemGeneric
- BlinkMacSystemFontGeneric
- "Segoe UI"
- Roboto
- "Helvetica Neue"
- Arial
- sans-serifGeneric
- "Apple Color Emoji"
- "Segoe UI Emoji"
- "Segoe UI Symbol"
Live preview
Rendered with the stack applied directly. Your browser resolves the first font it finds installed on your operating system.
The quick brown fox jumps over the lazy dog
Pack my box with five dozen liquor jugs. Sphinx of black quartz, judge my vow. 0123456789 !?@#&$%
function greet(name) {
return "Hello, " + name + "!";
}Output format
Output
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
Copy output grabs the entire snippet. Copy value grabs just the font-family value so you can drop it into any existing CSS rule.
Why a system stack
- Zero loading time. Nothing to download. The fonts are already on every visitor's device.
- No layout shift. No font swap moment, no FOUT, no FOIT. The text renders in its final shape on the first paint.
- Native look across operating systems. San Francisco on Apple, Segoe UI on Windows, Roboto on Android. The page feels at home everywhere.
- Better long-term reliability. No external CDN to go down. No license renewal. No font hosting bill.
Quoting rules
- Single-word identifiers like
RobotoandArialdo not need quotes. - Multi-word names like
"Helvetica Neue"must be wrapped in double quotes. - Generic keywords like
sans-serif,system-ui,ui-monospacemust stay unquoted. Quoting turns them into custom font names that no system has installed. - The vendor-prefixed
-apple-systemandBlinkMacSystemFontalso stay unquoted. The generator handles this automatically.
How to use
- Filter the picker to sans-serif, serif, or monospace if you already know the family you want, or leave it on All to browse every curated stack.
- Click a stack to load it. The Stack contents panel shows every font in order, with the trailing CSS generic family flagged so you can confirm the fallback is in place.
- Optionally type a preferred font in the Preferred font box. The generator quotes it correctly and prepends it to the chosen system stack.
- Pick an output format: CSS declaration, CSS rule with a selector, CSS variable, Tailwind v4 @theme block, Tailwind config fontFamily entry, or a JavaScript array.
- Click Copy output for the full snippet, or Copy value for the font-family list alone. Paste it into your stylesheet, design system, or Tailwind config.
About this tool
CSS Font Stack Generator builds production-ready font-family declarations using vetted system font stacks, so the text on your site renders instantly with no web font download, no FOUT, and no layout shift. Pick a stack from the curated library (modern system sans, native UI sans, Apple system, Segoe UI, humanist, geometric, grotesque, neo-grotesque Inter-based, transitional serif, old-style serif, didone serif, slab serif, GitHub stack, WordPress block editor stack, Bootstrap 5 stack, iOS and Android system stacks, rounded sans, handwriting casual, classic and modern monospace) or jump to one of the framework defaults (Tailwind v3 font-sans, font-serif, font-mono, Tailwind v4 font-sans, font-serif, font-mono). Each stack ends with the correct CSS generic family so the browser always has a final fallback. Optionally type a preferred font (a brand face, a Google Font name like Inter or Manrope, or a self-hosted face) and the generator prepends it with the right quoting rules applied: multi-word names are wrapped in double quotes, single-word identifiers stay bare, and CSS generic keywords like system-ui, ui-sans-serif, ui-monospace, -apple-system, and BlinkMacSystemFont are never quoted (quoting them would silently turn them into custom font names that no system has installed). The output panel switches between six formats with one click: a plain CSS font-family declaration, a complete CSS rule with an editable selector, a CSS custom property like --font-sans, a Tailwind v4 @theme block, a Tailwind v3 tailwind.config.js fontFamily entry as a typed JSON array, and a JavaScript array suitable for styled-components, Emotion, or React Native StyleSheet. A live preview renders a heading, a body paragraph, and a code block using the resolved stack so you can see the actual typography your visitors will get. Filter the stack list to sans-serif, serif, or monospace to focus the picker, copy either the full snippet or only the font-family value, and ship typography that loads in zero milliseconds because it never has to load at all. Everything runs locally; no fonts, no inputs, and no preferences leave your browser.
Free to use. Works in your browser. No signup, no login.
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