CSS font stack generator — system-safe font families with full Win/Mac/Linux/Android/iOS fallback chains, with CJK fallbacks, copy as CSS/Tailwind/SwiftUI.
- Runs locally
- Category Generator
- Best for Starting from a blank page without committing to the first result.
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
What this tool does
A font-stack generator for designers and front-end engineers tired of writing `font-family: "Helvetica Neue", Helvetica, Arial, sans-serif` from memory and getting the order wrong on Linux. Eight curated styles cover every realistic typography choice: sans-serif modern (Inter / Roboto / system-ui), sans-serif classic (Helvetica / Arial), serif (Georgia / Source Serif), serif elegant (Garamond / Times), mono (SF Mono / Consolas), mono retro (Courier), handwriting (Caveat / Brush), and display (Impact / Oswald). Each style ships a real fallback chain in real OS order: macOS first (PingFang, SF Pro), then Windows (Segoe UI, Microsoft YaHei), then Linux (Noto, DejaVu, Liberation), then Android and iOS, ending with `system-ui` and a generic family so a missing font never falls to the browser default Times. CJK is treated as a first-class citizen — pick simplified Chinese, traditional Chinese, Japanese, or Korean and the chain prepends the right OS-native CJK family (PingFang SC / Microsoft YaHei / Source Han Sans / Hiragino Sans / Yu Gothic / Apple SD Gothic Neo / Malgun Gothic) plus a Noto Sans sub-fallback so any platform renders CJK glyphs correctly. A live preview shows four sample lines (English / Chinese / Japanese / Korean) under the chosen stack at a glance. A cross-platform render panel forces the three big OS chains side by side (Win / Mac / Linux) so you can spot where Linux renders Liberation instead of Helvetica. Fallback depth (3 / 5 / 7) trades source clarity for safety. Four copy-ready exports cover every project: CSS `font-family`, Tailwind `theme.extend.fontFamily`, SwiftUI `Font.system(...)`, and SCSS variable. A common-mistake checker warns when the stack is missing a generic-family tail — the silent failure mode where a missing first font drops the user to the browser default serif. 100% client-side, every input round-trips through the URL so a shared link lands your designer on the same eight stacks.
Tool details
- Input
- Structured content
- The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
- Output
- Live result + Copy + Preview
- The result area focuses on usable output, with copy, download, or preview actions when supported.
- Privacy
- Browser-side processing
- The main tool logic does not call an external API, so inputs normally stay in the current tab.
- Save / share
- Shareable URL state
- Key settings are encoded in the URL so another person can reopen the same setup.
- Performance budget
- Initial JS <= 22 KB
- No WASM budget is declared, keeping the tool quick to open on mobile.
- Best fit
- Generator · Designer
- Category and role tags drive related tools, internal links, and quick fit checks.
How to use
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1. Input
Paste or drop your content into the tool panel.
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2. Process
Click the button. All processing is local in your browser.
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3. Copy / Download
Copy the result or download to disk in one click.
How CSS Font Stack Generator fits into your work
Use it to get a strong first draft, starter asset, or structured output that you can edit before publishing.
Generation jobs
- Starting from a blank page without committing to the first result.
- Creating repeatable drafts, names, templates, or placeholder assets.
- Exploring options before choosing the one that fits the job.
Generation checks
- Review generated output before it reaches a customer, page, or document.
- Change defaults when you need a specific brand voice, format, or audience.
- Keep only the parts that match the real task.
Good next steps
These links move the current task into a more complete workflow.
- 1 PX REM EM Converter CSS px ↔ rem ↔ em converter — visual scale, base font size adjustable. Open
- 2 CSS clamp() Fluid Typography Generator CSS clamp() fluid typography generator — min/max font size, viewport range, full type scale (h1-h6 + body), copy CSS / Tailwind. Open
- 3 CSS Shadow Generator Pro CSS shadow generator pro — multi-layer box-shadow + text-shadow + filter:drop-shadow, with Material/Tailwind/Apple shadow presets and dark-mode preview. Open
Real-world use cases
Replace a hand-typed `font-family` line that breaks on Windows
Your CSS has `font-family: "Helvetica Neue", sans-serif` from three years ago when you only tested on Mac. A user opens the site on Windows: Helvetica isn't installed, browser falls to generic sans (Arial-ish on Windows, usually fine; Times on older browsers, not fine). Generate the "sans-serif classic" stack here at depth 5 — you get `"Helvetica Neue", Helvetica, Arial, "Liberation Sans", system-ui, sans-serif`. Paste, commit, Windows users now see Arial (the intended look) and the browser-default-Times regression is gone. Two-minute fix you should have done years ago.
Add Chinese fallback to a bilingual marketing site
Your landing page is mostly English but has a Chinese product name in the hero and a Chinese tagline in the footer. The current stack is `Inter, sans-serif` — Chinese characters fall to the browser's last-resort CJK face, which on Linux is a chunky bitmap. Generate the modern sans-serif stack with CJK set to "simplified Chinese". The output prepends `"PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC"` before your Inter chain. Browsers do per-character font fallback, so English characters still render in Inter, Chinese characters now render in PingFang on Mac, YaHei on Windows, Source Han Sans on Linux. One paste, both languages look right.
Match a Figma spec that says "system font, no Google Fonts"
Designer hands you a Figma file with the note "use the OS system font, no web font loading". You know this means system-ui-first, but you also know `system-ui` alone breaks on older Android and IE. Generate the "sans-serif modern" stack at depth 5 with `system-ui` priority enabled. You get `system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif` — the GitHub-style stack that hits the OS UI font on every modern platform and degrades to Roboto / Arial on the rest. Zero web font loaded, zero CLS, zero billing on Google Fonts. Three minutes from spec to commit.
Ship a Tailwind project with a sane default font-family
Default Tailwind ships `font-sans` as `ui-sans-serif, system-ui, ...` which is fine but doesn't include the PingFang / YaHei prefix your Chinese users want. Generate modern sans-serif with simplified Chinese CJK enabled, switch to the Tailwind export. You get `fontFamily: { sans: [...] }` block ready to paste under `theme.extend`. Your CN users now see PingFang on Mac instead of falling to the Tailwind default ui-sans-serif behavior, which on Mac happens to be SF Pro (no CJK glyphs) and silently relies on the OS for fallback. Now the fallback is explicit and predictable.
Document a brand typography spec in one paste
Brand team needs a one-page typography spec: heading stack, body stack, mono stack, plus the CJK variants. Generate four times (display, modern sans, mono, with/without CJK), copy each CSS line, paste into the brand doc with the labels "Heading: ... / Body: ... / Code: ..." Designers, engineers, and ops all reference one source of truth, and the SwiftUI export covers your iOS app. The shareable URL means any of them can re-open the tool to verify which depth and which CJK was selected.
Audit an old codebase for missing generic-family fallbacks
Inherit a CSS file with 30+ `font-family:` declarations, none ending with `sans-serif` or `serif`. The common-mistake panel in this tool reminds you what the failure mode looks like — missing first font → browser-default Times. Use the stack output here as the canonical 8 stacks, codemod the old file to reference one of 8 CSS variables (`--font-sans`, `--font-serif`, ...), commit. Bundle is smaller (one stack per category instead of 30 ad-hoc lines), regression risk is lower (impossible to forget the generic family), and the next time the brand changes you edit 8 lines, not 30.
Common pitfalls
Forgetting the generic family at the end. `font-family: Inter` alone, with no `sans-serif` fallback, drops to the browser default (often Times) when Inter is missing. Always end with `system-ui, sans-serif` (or `serif` / `monospace`) — this tool enforces it by default.
Putting a CJK font AFTER the Latin font. Modern browsers do per-character fallback, but for CJK characters the chain is walked left-to-right; if your Latin font partially covers CJK with bad glyphs the browser uses those, never reaching the CJK family later. Always put CJK BEFORE Latin for the relevant language.
Quoting single-word names (`"Inter"` instead of `Inter`). Not a functional bug, but adds bytes and confuses linters. CSS only requires quotes for multi-word names like `"Segoe UI"` or `"Helvetica Neue"`. This tool quotes only when needed.
Using `BlinkMacSystemFont` without `-apple-system` first. `-apple-system` is the correct keyword for Safari; `BlinkMacSystemFont` is the Chromium-on-Mac fallback. Both in that order is the GitHub-recommended pattern. Either alone misses half the Mac browser market.
Setting `font-family: 'system-ui'` alone with no other entries. `system-ui` is unsupported in IE and partially supported in older Android browsers. Always pair with `-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto` so modern platforms hit the right OS font and old platforms degrade gracefully.
Putting `Roboto` ahead of `-apple-system` on a SaaS stack. Roboto is the Android/ChromeOS default; if it is installed locally on a Mac (designers often have it), it renders INSTEAD of SF Pro, giving an off "this looks like Android" feel on macOS. Apple system fonts should always come first if you want SF Pro to win.
Privacy
Every choice you make — which style, which CJK language, what fallback depth, which export format — stays in your browser. The tool runs as a static React island on an Astro page; no server endpoint participates in building or copying the stack, no analytics tracks which styles you picked, no telemetry on which export format you copied. The shareable URL carries only the configuration (style key, CJK language, depth) — no user id, no session token, no tracking parameters. Open the tool, pick a stack, copy it, close the tab — nothing leaves your machine. The preview text uses static sample sentences bundled in the tool; no font is loaded from a remote server because the whole point is system-font fallbacks.
FAQ
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