Fontes, licenças e inspirações dos dados e das ferramentas usados aqui (em inglês).

Credits

Inspiration

• Fallback Font Generator by Brian Louis Ramirez — live preview of adjusted fallback fonts.
• Font Fallback Stack Generator by Aback Tools — curated stack presets.
• CSS Font Stack — font availability per operating system.
• Everything Fonts — font inspector ideas: @font-face syntax and browser support, licenses and specifications, colour and background previews, waterfall, glyph viewer, Unicode map and glyph coverage.
• Wakamai Fondue by Roel Nieskens — the idea of a font details panel: OpenType features with live samples, variable axes, supported languages and copyable CSS.

Data

Source	Used for	License
@capsizecss/metrics	System and Google Fonts metrics	MIT
adrg/os-font-list	Seed of fonts per OS version	MIT
Modern Font Stacks	Presets, availability cross-check	CC0-1.0
Browserslist	Audience queries	MIT
caniuse-lite / Can I use	Browser usage data	CC BY 4.0
Baseline icons (baseline-icon.js)	Baseline logo next to every mention of Baseline	Apache-2.0
baseline-browser-mapping	Baseline queries	Apache-2.0
Microsoft Learn: Windows 10 and 11 font lists	Font availability on Windows (preinstalled vs Feature on Demand)	Microsoft documentation, facts only
Apple: System Fonts	Font availability on current macOS and iOS	Apple documentation, facts only
AOSP fonts.xml (tags android-10 to android-16)	Fonts shipped with Android	Apache-2.0
Chromium OS chromeos-fonts ebuild	Font packages installed on ChromeOS	Package names only (BSD-3-Clause)
Ubuntu desktop ISO manifests (20.04, 22.04, 24.04, 26.04)	Font packages installed by default on Ubuntu desktop	Package names only
Debian GNOME live image package lists (12.15.0, 13.6.0)	Font packages installed by default on Debian desktop	Package names only
Font files read to extract metrics (nothing is redistributed): google/fonts (Roboto, Noto Sans, Noto Serif, Lato, Arimo, Tinos, Cousine, Carlito, Caladea: OFL-1.1; Ubuntu, Ubuntu Mono: UFL-1.0), DejaVu fonts 2.37 (Bitstream Vera licence), Liberation fonts 2.1.5 (OFL-1.1), Droid Sans Mono from AOSP (Apache-2.0), and the Microsoft fonts installed with Windows	Vertical metrics and glyph advances in src/modules/os-fonts/data/metrics.json	Facts about the fonts; font files are not committed
modern-font-stacks (Dan Klammer, MIT)	Inspiration for the preset categories (neo-grotesque, humanist, transitional, …); the stacks are our own selection	Ideas only, no code copied
Google Fonts metadata and CSS API	Family catalog (names, categories, subsets, styles) and, at run time, the user-chosen font download	Catalog facts; fonts are OFL/Apache/UFL and are not redistributed
Fontsource API (api.fontsource.org) and jsDelivr	Catalog of the non-Google open fonts (names, categories, weights, styles, subsets) and, at run time, the user-chosen font download from cdn.jsdelivr.net/fontsource/fonts/	Catalog facts; fonts are OFL-1.1 (a few CC0, Apache-2.0, MIT, Unlicense) and are not redistributed
Google Fonts CSS API subset unicode-range values	Definitions of the named subsets (latin, cyrillic, greek, …)	Facts (numeric ranges)
Unicode Character Database Blocks.txt	Block names and ranges for the glyph coverage table and map	Unicode License v3
Unicode CLDR (cldr-misc-full exemplar characters, via cldr-json)	Standard letters per language, to list the languages a font covers (scripts/build-languages.mjs)	Unicode License v3
MDN browser-compat-data	@font-face descriptor support	CC0-1.0
StatCounter Global Stats via Wikipedia: Usage share of operating systems	Default desktop OS split (worldwide desktop, June 2026: Windows 62.16%, macOS 14.58%, Linux 3.09%, ChromeOS 1.42%, unknown 18.75% redistributed proportionally)	CC BY-SA 3.0
Capsize unpack 4.0.1	English/Latin frequency weights, sampled from English Wikinews abstracts	MIT; underlying Wikinews content CC BY 2.5
UD Russian GSD by Ryan McDonald, Vitaly Nikolaev and Olga Lyashevskaya	Cyrillic character counts derived from 3,850 training sentences; corpus text is not shipped	CC BY-SA 4.0

Tooling

• Paraglide JS by inlang — message compilation and i18n routing (MIT).
• Dependabot — automated dependency update PRs (GitHub, config only).
• Cloudflare Workers static assets headers and Astro Content Security Policy — _headers delivery and hashed CSP; MDN CSP and Permissions-Policy — policy design.
• browserslist-ga, browserslist-ga-export, browserslist-plausible and the custom usage data format — linked from the statistics import (MIT).
• git-cliff — changelog generation from Conventional Commits (MIT OR Apache-2.0).
• fontkitten — local font parsing in a Web Worker (MIT).
• fontkitten test fonts — Source Sans Pro (Adobe), Fira Sans (Carrois Corporate / bBox Type) and Mada (Khaled Hosny) fixtures (SIL OFL 1.1; licenses included in tests/fixtures/fonts).

Methodology

• FEOD — Fractal Entity Oriented Design — project architecture.
• Vite Web Workers — bundling dedicated module workers.
• MDN Worker.terminate — watchdog cancellation of parsing.
• FontTools — independent fixture metric checks (MIT).
• OpenType OS/2 specification — legacy table lengths and vertical metric fields.
• CSS Fonts Level 5 — scaling metric overrides and nonnegative descriptors.
• Capsize core (MIT) and Fontaine (MIT) — fit formulas; frozen Capsize 4.1.3 reference outputs with metrics 4.3.0.
• FreeType SFNT metrics selection — explicit freetype vertical metric policy (FreeType License / GPLv2).
• CSSOM string serialization — CSS string escaping, extended to escape < for HTML style embedding.
• CSS Fonts Level 4 and Level 5 — quoted family/local names and metric descriptors.
• WCAG 2.2 non-text contrast and relative luminance — independent control-boundary contrast checks alongside axe.
• Biome suppressions — narrowly scoped exceptions for keyboard focus on tab panels and scrollable code.
• WAI-ARIA Tabs Pattern — tab semantics and roving keyboard focus.
• Preact hooks — stable server/client IDs and local component state.
• MDN light-dark and forced colors — theme and system-color handling.
• MDN Clipboard.writeText — explicit copy actions with accessible failure feedback.
• Simple Icons (CC0 1.0) — brand marks for browsers, systems, GitHub, Google Fonts, CSS, HTML, Tailwind CSS, Next.js, Nuxt and Astro in public/brands.svg. The marks belong to their owners.
• Font Awesome Free brands (icons under CC BY 4.0, Fonticons, Inc.) — the Windows and Edge marks and the save, share, download, copy and forget action icons in public/brands.svg.
• Browserslist logo by Anton Popov (MIT) — the Browserslist mark in public/brands.svg.
• WAI-ARIA APG select-only combobox — keyboard and ARIA model of the custom dropdown.
• Google Translate — machine translation used while developing as a second opinion on the Arabic messages (back-translation to English and a forward comparison); no output is shipped verbatim.
• Shiki (MIT) — syntax highlighting of the export code: the JavaScript regex engine and the CSS, HTML, JavaScript, TypeScript and Markdown grammars with a CSS-variables theme, rendered as class names.
• WordPress theme.json font library reference and Fontaine README (MIT) — the fontFamilies/fontFace structure and the FontaineTransform.vite options used by the export formats.