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Source Sans 3
About Source Sans 3
- Source
- Google Fonts ↗
- Classification
- sans-serif
- Weights
- Variable (100-900)
- Features
- Variable, Italics
Free to use, modify, and distribute. Can be used commercially without attribution.
What's allowed?
- ✓ Client work
- ✓ SaaS / Web apps
- ✓ YouTube / Video
- ✓ Sell products
- ✓ Print materials
Note: Derivative fonts must use the same license.
Full license guide →Source Sans 3 is an open-source sans-serif typeface designed by Paul D. Hunt for Adobe. Originally released in 2012 as Source Sans Pro, it was Adobe's first open-source type family and has undergone significant revisions, with the version 3 update adding variable font support, expanded language coverage, and refined letterforms.
History and Design
Paul D. Hunt designed Source Sans Pro as part of Adobe's commitment to open-source typography. The typeface draws on the American gothic tradition while incorporating humanist characteristics that enhance readability at text sizes. The Source Sans 3 update brought variable font axes, broader Unicode coverage, and improvements to spacing and kerning.
Why Source Sans 3 is Popular
Source Sans 3 occupies a sweet spot between neutrality and warmth. It is readable enough for long-form text yet characterful enough for UI and branding. Adobe uses it extensively in their own products and documentation, giving it proven track record in complex interface environments.
Technical Features
- Variable font: Weight axis from ExtraLight (200) to Black (900)
- Comprehensive italic family: All weights include true italics
- Broad language support: Latin, Cyrillic, Greek, Vietnamese, and extended character sets
- Part of a superfamily: Pairs with Source Serif Pro and Source Code Pro
- OpenType features: Small caps, tabular figures, fractions, case-sensitive forms
Best Use Cases
Source Sans 3 excels in:
- Documentation and technical writing: Clean, highly readable at small sizes
- Enterprise applications: Neutral tone for internal tools and dashboards
- Government and healthcare: Accessible, trustworthy, and legible
- Web applications: Excellent rendering with hinting for screen display
Usage Tips
For body text, use weight 400 at 14-16px. For UI labels and navigation, 500-600 provides emphasis without heaviness. Source Sans 3 pairs naturally with Source Serif Pro for editorial layouts and Source Code Pro for technical documentation, creating a cohesive typographic system across content types.
Legacy
Source Sans was the first family in Adobe's open-source type library, which grew to include Source Serif and Source Code. Its success helped establish that professional typefaces could thrive under open-source licensing.
Is Source Sans 3 on Google Fonts?
Yes, Source Sans 3 is available for free on Google Fonts. Get Source Sans 3 on Google Fonts ↗
Alternative For (47)
Source Sans 3 is a free alternative to the following premium fonts:
Adobe's clean humanist workhorse with a full variable weight range
Enterprise-grade alternative with strong hinting and proven cross-platform rendering
Broader language support with similar humanist grotesque balance
Adobe's professional sans with strong hinting and broad language coverage
Adobe's workhorse sans with excellent hinting and variable font support
Reliable workhorse with broader language support and strong hinting
Adobe's professional sans with strong hinting and extensive language coverage
Adobe's workhorse sans with proven enterprise reliability and broad language support
Enterprise alternative with broader language support and proven reliability
Adobe's workhorse sans with exceptional hinting and broad platform support
Adobe's workhorse sans with strong hinting and proven enterprise reliability
Adobe's workhorse sans with strong hinting and broad language coverage
Reliable workhorse with broader language support and enterprise-grade optimization
Adobe's workhorse sans with broad language support and strong hinting
Adobe's workhorse sans with broad language support and strong hinting
Highly readable workhorse with open shapes and excellent hinting for screen display
Adobe's workhorse sans with excellent cross-platform rendering and variable support
Adobe's workhorse sans with broad language support and proven enterprise reliability
Adobe's workhorse sans with broad language support and proven reliability at scale
Adobe's systematic workhorse with proven institutional reliability
Adobe's enterprise workhorse with proven institutional reliability and broad language support
Versatile humanist sans with clear, legible construction
Adobe humanist sans with similar legibility and warmth
Adobe's open-source UI sans; humanist warmth over Arial's neutrality.
Adobe's open-source UI sans, humanist where Aptos is grotesque-with-warmth.
Clean humanist sans for Optima's professional, understated roles
Clean neo-grotesque with comparable professional utility
Adobe's humanist sans with comparable neutrality and readability
Adobe's open-source counterpart with similar design philosophy
Adobe's humanist sans with excellent readability
Adobe's open-source alternative with comparable weight range and clarity
Shares emphasis on digital legibility with humanist proportions
Professional sans-serif with readable proportions for editorial contexts
Adobe's humanist sans offers comparable professional versatility
Adobe's humanist sans shares similar open proportions and professional character
Professional sans-serif with similar editorial and corporate utility
Compare Source Sans 3
See how Source Sans 3 compares to other fonts side by side.
Variable Font Axes
Source Sans 3 is a variable font with 1 axis you can fine-tune.
| Axis | Min | Default | Max |
|---|---|---|---|
| wght | 200 | 400 | 900 |
Font Pairings
Fonts that pair well with Source Sans 3 based on contrast and complementary design characteristics.
Performance
Key metrics for evaluating Source Sans 3 in production.
- Score
- 59 /100 Average
- File Size
- 380.1 KB Heavy
- Weights
- 9 (variable) + Italics
- Languages
- 7 groups CDN delivery
Font Metrics
- x-Height Ratio
- 0.486
- Cap Height Ratio
- 0.66
- Ascender
- 1024
- Descender
- -400
Fallback CSS Overrides
Apply these overrides to Arial to minimize layout shift when loading Source Sans 3.
@font-face {
font-family: 'Source Sans 3 Fallback';
src: local('Arial');
ascent-override: 102.4%;
descent-override: 40%;
line-gap-override: 0%;
size-adjust: 93.72%;
}How to Use Source Sans 3
Copy these code snippets to quickly add Source Sans 3 to your project.
CSS code for Source Sans 3
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@100..900&display=swap');HTML code for Source Sans 3
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@100..900&display=swap" rel="stylesheet">Tailwind code for Source Sans 3
// tailwind.config.js
module.exports = {
theme: {
extend: {
fontFamily: {
'source-sans-3': ['"Source Sans 3"', 'sans-serif'],
},
},
},
}
// Usage in HTML:
// <p class="font-source-sans-3">Your text here</p>Next.js code for Source Sans 3
// Using next/font (Next.js 13+)
import { Source_Sans_3 } from 'next/font/google';
const source_sans_3 = Source_Sans_3({
subsets: ['latin'],
weight: ['100', '200', '300', '400', '500', '600', '700', '800', '900'],
});
export default function Component() {
return (
<p className={source_sans_3.className}>
Your text here
</p>
);
}
// Or using inline styles with Google Fonts link:
// <p style={{ fontFamily: '"Source Sans 3"' }}>Your text</p>Expo and React Native code for Source Sans 3
// Install: npx expo install @expo-google-fonts/source-sans-3 expo-font
import { useFonts, Source_Sans_3_400Regular } from '@expo-google-fonts/source-sans-3';
export default function App() {
const [fontsLoaded] = useFonts({
Source_Sans_3_400Regular,
});
if (!fontsLoaded) return null;
return (
<Text style={{ fontFamily: 'Source_Sans_3_400Regular' }}>
Your text here
</Text>
);
}