Monospace · Andi Rueckel

Undefined Medium

Your words – they follow you round the site

Case

Size72 px

Weight500 MediumThe only weight it comes in

Letter spacing0 em

Line height1.10

Find the font. Find its kind.

CSSfont-family: 'Undefined Medium', monospace; font-weight: 500; font-style: normal; line-height: 1.1;

Undefined Medium is a free monospace font by Andi Rueckel, from its maker’s repository on GitHub. Among the 99 monospaced fonts on FontKind, Undefined Medium has an x-height shorter than 61%, is of average width and, at its regular weight, is darker than 88%.

Compare with Fusion Pixel 10px Monospaced JP →Compare with another font

01 / Light table

Laid on top of Fusion Pixel 10px Monospaced JP

Undefined Medium on one light table with its two closest fonts, Fusion Pixel 10px Monospaced JP (86 out of 100) and Pixel Code (86). Fusion Pixel 10px Monospaced JP is 17% narrower; Pixel Code is 11% wider, with an x-height 11% taller.

Layout

Letters

Show

Size auto

Ink shared with Undefined MediumFusion Pixel 10px Monospaced JP…

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 Undefined Medium alphabet

Capitals, lowercase, figures and signs · weight 500

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

&
?
!
@
%
(
)

03 / Sizes

Undefined Medium at every size

1 weight (500) · six sizes, in your words

12 px
16 px
24 px
36 px
48 px
72 px

04 / Facts

Who made Undefined Medium, and can you use it?

Designer: Andi Rueckel
Kind: Monospace
Styles: 1 weight (500)
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, under another name. Not as “undefined medium”: the licence reserves the name.
Sharing the files: Yes, but not for sale. With the licence.

Undefined Medium 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 Undefined Medium 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 Undefined Medium, or upload it with Canva Pro. Canva’s help
Cricut: Once installed. Design Space lists Undefined Medium under System. Fonts for Cricut →

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

How each app gets its fonts →

Get Undefined Medium on GitHub

05 / Measurements

Undefined Medium, measured

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

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

x-height: 50.0% of the emlowercase x
Cap height: 70.0% of the emcapitals
x / cap: 0.71lowercase against capitals
Width: 60.0% of the emaverage lowercase
Ink: 43%letter box filled

How we measure →

Where it stands among monospaced fonts

Ranked against all 99 monospaced fonts on FontKind

x-heightSmaller than 61% of monospaced fonts
WidthNear the middle of monospaced fonts
InkDarker than 88% of monospaced fonts

06 / Similar fonts

Fonts similar to Undefined Medium

Matched letter by letter · its own family apart

All 100 fonts similar to Undefined Medium →Compare side by side →Get Undefined Medium on GitHub

07 / Swap

Swap Undefined Medium without a jump

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

Fallback while it loads

Until Undefined Medium loads, this sets Courier New in its place at 100% of its size, so running text keeps Undefined Medium’s width and lines keep their height: nothing moves when it arrives.

@font-face {
  font-family: 'Undefined Medium Fallback';
  src: local('Courier New');
  size-adjust: 99.98%;
  ascent-override: 110.02%;
  descent-override: 30.00%;
  line-gap-override: 20.00%;
}

font-family: 'Undefined Medium', 'Undefined Medium Fallback', monospace;

08 / Questions

Questions about Undefined Medium

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

Is Undefined Medium free for commercial use?

Yes. Undefined Medium is under the SIL Open Font License 1.1 , which allows commercial use at any scale, logos, websites, apps and PDFs included; a changed version may not be called “undefined medium”.

How do I download and install Undefined Medium?

Undefined Medium comes free from its maker’s repository on GitHub . On its repository there, choose Code, then Download ZIP, and unzip the file: the fonts are in its fonts/ttf folder. 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 Undefined Medium in Google Docs?

Probably not: the More fonts list in Docs draws on Google Fonts, and Undefined Medium 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 Undefined Medium have?

Undefined Medium comes in one weight, Medium (500). Ask for bold and most apps thicken the letters themselves: a faux bold, not a drawn one.

Who designed Undefined Medium?

Undefined Medium was designed by Andi Rueckel.

What fonts are similar to Undefined Medium?

The closest in our letter-by-letter match are Fusion Pixel 10px Monospaced JP (86), Pixel Code (86) and Monocraft (85), out of 100. Next to Undefined Medium, Fusion Pixel 10px Monospaced JP is 17% narrower. See all 100 fonts like Undefined Medium.