Source Serif 4
serif · Designed by Frank Grießhammer
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Snippet updates automatically to match whichever weight you select above.
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Source Serif 4 is a classical serif typeface with a warm, grounded presence. It draws from the tradition of 16th-century type design but has been refined for modern screen use, featuring sturdy serifs, moderate contrast between thick and thin strokes, and open letterforms that hold up well at both small and large sizes. It reads as authoritative without being stiff, and its optical sizing variants make it genuinely flexible across a range of contexts. The overall feel is trustworthy and readable, leaning toward the literary and editorial rather than the corporate or sterile.
Source Serif 4 works well as a body text font for long-form editorial content, such as online magazines, news sites, or digital publications where sustained reading comfort is a priority. It also suits branding for professional services firms, publishers, or educational institutions that want a classic look without feeling dated. As a heading font at larger sizes, it brings a refined but approachable tone to landing pages or product sites that want to distinguish themselves from the overused sans-serif defaults common in tech and startup design.
Best suited for: Long-form editorial content, professional service branding, digital publications, and refined landing pages where readable body text and authoritative presence are priorities.
Design considerations: The extensive weight range from 200 to 900, plus matching italics, supports flexible typographic hierarchies across editorial and branding applications. Optical refinement for screen display makes it suitable for both extended reading and display contexts without requiring size-specific variants.
Pairing guidance: Pair Source Serif 4 with Raleway or Source Sans 3 to establish clear contrast between serif body text and clean sans-serif headers, or combine it with Playfair Display when a more decorative serif heading complements the body's classical restraint.
Pairs well with
Source Serif 4 at a glance
Frank Grießhammer
SIL Open Font License 1.1
November 2021
September 2025
16 (8 weights + italics)
Yes: optical size 8–60, weight 200–900
Serif
6
Google Fonts
All 16 Source Serif 4 styles
| Weight | Name | Upright | Italic |
|---|---|---|---|
| 200 | ExtraLight | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 300 | Light | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 400 | Regular | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 500 | Medium | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 600 | SemiBold | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 700 | Bold | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 800 | ExtraBold | Aa Bb Gg 123 | Aa Bb Gg 123 |
| 900 | Black | Aa Bb Gg 123 | Aa Bb Gg 123 |
Source Serif 4 character map
Which languages does Source Serif 4 support?
Source Serif 4 includes 6 character sets:
- Cyrillic: Russian, Ukrainian, Bulgarian, Serbian and other Cyrillic-script languages
- Cyrillic Extended: additional Cyrillic letters used in languages such as Kazakh, Tatar and Bashkir
- Greek: modern Greek
- Latin: English, Spanish, French, German, Italian, Portuguese and other Western European languages
- Latin Extended: Central and Eastern European languages such as Polish, Czech, Turkish, Romanian and Hungarian
- Vietnamese: Vietnamese, including its stacked tone marks
Can I use Source Serif 4 commercially?
Yes, it's free for personal and commercial use. Source Serif 4 is released under the SIL Open Font License 1.1. You can use it in logos, websites, apps, videos, printed products and merchandise without paying or asking permission. The one thing you can't do is sell the font file on its own.