Spline Sans Mono
monospace · Designed by Eben Sorkin, Mirko Velimirović
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Spline Sans Mono is a clean, geometric monospace typeface with a modern technical feel. Its letterforms are consistent and precise, with uniform stroke widths and a neutral character that leans professional rather than quirky. It carries enough personality to feel intentional without drawing too much attention to itself, making it comfortable to read at smaller sizes while still holding its own at display scale. The spacing is well-balanced for a monospace, avoiding the awkward gaps that can make code-style fonts feel clunky in non-code contexts.
This font works well as a UI typeface for developer tools, documentation sites, and SaaS dashboards where a technical aesthetic reinforces the product's identity. It is also a strong choice for code samples and terminal-style interfaces in technical blogs or API documentation. Beyond the tech space, it can serve as a functional accent font in editorial layouts or brand systems that want a restrained, data-driven look without committing fully to a retro typewriter style.
Best suited for: Code editors, developer documentation, SaaS interfaces, technical blogs, API references, and terminal-style displays where a neutral monospace aesthetic supports functionality.
Design considerations: The ten available weights and italics provide flexibility for hierarchy and emphasis within code-heavy layouts. Its geometric construction and consistent stroke widths make it legible at small sizes typical of code blocks while remaining composed at larger display scales.
Pairing guidance: Pair Spline Sans Mono with DM Sans as a humanist sans-serif for body text and UI labels, Source Serif 4 as a serif counterpoint for editorial or documentation headers, and Space Grotesk as a geometric sans-serif for headlines or accent elements that echo the monospace's technical character.
Pairs well with
Spline Sans Mono at a glance
Eben Sorkin, Mirko Velimirović
SIL Open Font License 1.1
March 2022
September 2025
10 (5 weights + italics)
Yes: weight 300–700
Monospace
2
Google Fonts
All 10 Spline Sans Mono styles
| Weight | Name | Upright | Italic |
|---|---|---|---|
| 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 |
Spline Sans Mono character map
Which languages does Spline Sans Mono support?
Spline Sans Mono includes 2 character sets:
- 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
It does not include Cyrillic or Greek characters, so it can't set Russian, Ukrainian or Greek text.
Can I use Spline Sans Mono commercially?
Yes, it's free for personal and commercial use. Spline Sans Mono 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.