Install FontSwap
Monospace font choice is one of the few typography decisions developers make personally and then stare at for eight hours a day. It deserves more than “whatever the editor shipped with.”
The field
| Font | Weights | Variable | Ligatures | Licence |
|---|---|---|---|---|
| JetBrains Mono | 100–800 | Yes | Yes | OFL-1.1 |
| Fira Code | 300–700 | Yes | Yes | OFL-1.1 |
| Geist Mono | 100–900 | Yes | No | OFL-1.1 |
| Source Code Pro | 200–900 | Yes | No | OFL-1.1 |
| Inconsolata | 200–900 | Yes | No | OFL-1.1 |
| Victor Mono | 100–700 | Yes | Yes | OFL-1.1 |
| Fira Mono | 400, 500, 700 | No | No | OFL-1.1 |
| Space Mono | 400, 700 | No | No | OFL-1.1 |
| Ubuntu Mono | 400, 700 | No | No | UFL-1.0 |
| Not Courier Sans | 400, 700 | No | No | GPL-2.0 + font exception |
For writing code
JetBrains Mono is the default recommendation and has been for a while. It was drawn by JetBrains specifically for their IDEs, which means the design brief was “someone will read this for thousands of hours.” Tall x-height, generous 1.2 line spacing baked into the metrics, unambiguous 0/O and 1/l/I, and a large set of programming ligatures you can turn off.
Fira Code is the font that made ligatures mainstream. It extends Mozilla’s Fira Mono with the arrow, comparison and arithmetic ligatures that render =>, !==, <= as single glyphs. If you like ligatures, this is the canonical implementation. Its weight range is the narrowest of the variable options here — 300 to 700.
Source Code Pro is Adobe’s, and it’s the conservative pick. No ligatures, no strong personality, exceptional hinting, and a full 200–900 range. If you work across Windows, macOS and Linux and want identical rendering, this is the one that behaves.
Victor Mono has a specific hook: a semi-connected cursive italic. Comments and keywords set in italic actually look italic — handwritten, distinct, immediately scannable — rather than merely slanted. Some people find it indispensable and others find it distracting. Try it before committing.
For interfaces and design
Geist Mono is Vercel’s, and it’s the best-looking monospace here for non-code use — code blocks in documentation, data tables, version numbers, timestamps, anywhere you want the monospace texture as a design element. Full 100–900 variable range, no ligatures, and a cleaner more contemporary drawing than the editor-first faces.
Space Mono is a display monospace with genuine character — quirky, retro-technical, drawn by Colophon for Google Fonts. Terrible for eight hours of code. Excellent for a headline, a brand accent, or a terminal aesthetic that’s meant to be seen rather than read.
Inconsolata deserves a note beyond its looks: it carries a wdth axis from 50 to 200. That’s the widest width range of any font in our collection, monospace or otherwise. Useful when you need a condensed monospace for a dense table, or a wide one for emphasis.
The rest
Fira Mono is Fira Code without the ligatures — pick it if you specifically don’t want them and don’t want to disable a feature.
Ubuntu Mono is narrower than most, which fits more columns on screen. Note the licence: UFL-1.0, the Ubuntu Font Licence, not OFL. It’s a free licence but it isn’t the one your legal review is expecting, and it has its own modification terms.
Not Courier Sans is an OSP redraw of Courier and the odd one out here in every sense, including licence — GPL-2.0 with a font exception. It’s an art-school font, not a work font, and that’s the point of it.
About ligatures
Programming ligatures replace character sequences with composite glyphs. != becomes a single crossed-equals, => becomes an arrow.
The case for: less visual noise, faster scanning of operator-dense code.
The case against: the glyph no longer maps one-to-one onto the characters. Column positions in error messages can mislead. Selecting text behaves in ways that surprise people. And in code review, the reviewer may be seeing something different from what the author typed.
It’s a genuine preference split, not a right answer. Both JetBrains Mono and Fira Code let you disable them:
.code {
font-family: "JetBrains Mono", monospace;
font-variant-ligatures: none;
}In most editors it’s a setting rather than CSS — VS Code’s editor.fontLigatures, for instance.
What to check before you commit
Set this string in the candidate font at your working size:
Il1| 0OQD {}[]() ,.;: '"` ~-_ 8B 5S 2Z rn/mEvery pair in there is a real confusion that has cost someone real time. If rn looks like m at 13px, or , and . are indistinguishable, the font will hurt you eventually regardless of how good it looks in a specimen.
FAQ
Which free monospace font is closest to SF Mono? Geist Mono for the clean contemporary drawing, Source Code Pro for the proportions and neutrality. SF Mono itself is Apple’s and isn’t licensed for general webfont use.
Do I need a nerd-font patched version?
Only for terminal setups that render icon glyphs — powerline prompts, file-type icons in ls replacements. For an editor or a website, the unpatched font is what you want.
Can I use a monospace font for body text? For short blocks, yes, and it can look great. For paragraphs, no — the uniform character widths remove the word-shape cues that fluent reading depends on, and speed drops noticeably.
Which has the best terminal rendering at small sizes? Source Code Pro has the most thorough hinting and is the safest across platforms. JetBrains Mono is close and has the taller x-height, which usually wins below 12px.