Monospace · Mad Simple

Illinois Mono

Q: Is Illinois Mono free for commercial use?

Yes. Illinois Mono is under the SIL Open Font License 1.1, which allows commercial use at any scale, logos, websites, apps and PDFs included.

Your words – they follow you round the site

Case

Size72 px

Weight400 Regular

Letter spacing0 em

Line height1.10

Find the font. Find its kind.

CSSfont-family: 'Illinois Mono', monospace; font-weight: 400; font-style: normal; line-height: 1.1;

Illinois Mono is a free monospace font by Mad Simple, from its maker’s repository on GitHub. Among the 99 monospaced fonts on FontKind, Illinois Mono has an average x-height, is narrower than 62% and, at its regular weight, is lighter than 68%. Its thickest strokes are 1.2 times its thinnest: nearly even strokes.

Compare with Atkinson Hyperlegible Mono →Compare with another font

01 / Light table

Laid on top of Atkinson Hyperlegible Mono

Illinois Mono on one light table with its two closest fonts, Atkinson Hyperlegible Mono (80 out of 100) and Lab Mono (80). Atkinson Hyperlegible Mono is 5% wider; Lab Mono is 7% wider, with an x-height 4% taller.

Layout

Letters

Show

Size auto

Ink shared with Illinois MonoAtkinson Hyperlegible Mono…

Most different letters first; the figure is the share of ink the fonts have in common. Where the fonts agree the letters cancel to black: every white sliver is a real difference.

Open in the compare tool →

02 / Letters

The Illinois Mono alphabet

Capitals, lowercase, figures and signs · weight 400

Tap the letters you like, here and in other fonts, to find the fonts whose letters look most like them.

&
?
!
@
%
(
)

03 / Weights

Illinois Mono in 3 weights

3 weights, 400–700, with italics

400 Regular, with its italic
500 Medium, with its italic
700 Bold, with its italic

04 / Facts

Who made Illinois Mono, and can you use it?

Designer: Mad Simple
Kind: Monospace
Styles: 3 weights, 400–700, with italics
From: GitHub
Character sets: latin, latin-ext
Licence: SIL Open Font License 1.1

Can I use it?

Commercial use: Yes.
Logos: Yes.
Websites and apps: Yes. Self-hosted.
PDFs and documents: Yes.
Changes: Yes.
Sharing the files: Yes, but not for sale. With the licence.

Illinois Mono is under the SIL Open Font License 1.1. This is a plain summary, not legal advice: the licence itself decides.

What each licence allows →

Read the licence

Its licence file, in its repository

Already in your apps?

Google Docs: Not verified. Docs adds Google Fonts, and Illinois Mono comes from its maker’s repository on GitHub. Google’s guide
Word, PowerPoint: Not verified. Install it from its maker’s repository on GitHub first. Microsoft’s list
Figma: Not verified. Search its font menu, or install it. Figma’s help
Canva: Not verified. Search its font menu for Illinois Mono, or upload it with Canva Pro. Canva’s help
Cricut: Once installed. Design Space lists Illinois Mono under System. Fonts for Cricut →

From each app’s own font list or help pages.

How each app gets its fonts →

Get Illinois Mono on GitHub

05 / Measurements

Illinois Mono, measured

Taken from the font file's own outlines, regular style

Hxgp in Illinois Mono. Lines at the measured heights, as a share of the em · The parts of a letter, named

x-height: 50.6% of the emlowercase x
Cap height: 68.1% of the emcapitals
x / cap: 0.74lowercase against capitals
Width: 60.0% of the emaverage lowercase
Ink: 36%letter box filled
Contrast: 1.15 : 1nearly even strokes

How we measure →

Where it stands among monospaced fonts

Ranked against all 99 monospaced fonts on FontKind

x-heightNear the middle of monospaced fonts
WidthNarrower than 62% of monospaced fonts
InkLighter than 68% of monospaced fonts
ContrastMore contrast than 61% of monospaced fonts

06 / Similar fonts

Fonts similar to Illinois Mono

Matched letter by letter · its own family apart

All 100 fonts similar to Illinois Mono →Compare side by side →Get Illinois Mono on GitHub

07 / Swap

Swap Illinois Mono without a jump

Running text within 3% of the width, x-height within 5%

Fallback while it loads

Until Illinois Mono loads, this sets Courier New in its place at 99.9% of its size, so running text keeps Illinois Mono’s width and lines keep their height: nothing moves when it arrives.

@font-face {
  font-family: 'Illinois Mono Fallback';
  src: local('Courier New');
  size-adjust: 99.92%;
  ascent-override: 99.30%;
  descent-override: 30.99%;
  line-gap-override: 0.00%;
}

font-family: 'Illinois Mono', 'Illinois Mono Fallback', monospace;

08 / Questions

Questions about Illinois Mono

Answered from its licence, GitHub and each app’s own font list

Is Illinois Mono free for commercial use?

Yes. Illinois Mono is under the SIL Open Font License 1.1 , which allows commercial use at any scale, logos, websites, apps and PDFs included.

How do I download and install Illinois Mono?

Illinois Mono comes free from its maker’s repository on GitHub . On its repository there, choose Code, then Download ZIP, and unzip the file. On Windows or a Mac, double-click each TTF or OTF file and choose Install, then restart any app that was open. The web fonts this page uses load from its repository, through jsDelivr, as does its licence file .

Is Illinois Mono in Google Docs?

Probably not: the More fonts list in Docs draws on Google Fonts, and Illinois Mono comes from its maker’s repository on GitHub. Docs can’t add a font of your own, so set it in an app on your computer, such as Word, instead.

How many weights does Illinois Mono have?

Illinois Mono comes in three weights: Regular (400), Medium (500) and Bold (700), each with an italic.

Who designed Illinois Mono?

Illinois Mono was designed by Mad Simple.

What fonts are similar to Illinois Mono?

The closest in our letter-by-letter match are Atkinson Hyperlegible Mono (80), Lab Mono (80) and Red Hat Mono (78), out of 100. Next to Illinois Mono, Atkinson Hyperlegible Mono is 5% wider. See all 100 fonts like Illinois Mono.