Ioskeley Mono

Ioskeley Mono

A free, open-source monospace font crafted to match Berkeley Mono's aesthetic. Built by configuring Iosevka. Two widths, ten weights, italic variants, and Nerd Font support. Iosevka + Berkeley = Ioskeley.

Download Fonts GitHub Repository
Open source · SIL OFL 1.1 — Browse on GitHub →
10 Weights
2 Widths
∞ Italic Variants
1000+ Glyphs

Comparison with Berkeley Mono

Ioskeley Mono vs Berkeley Mono — Character Forms
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Ioskeley Mono vs Berkeley Mono — Pixel Overlay
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Ioskeley Mono vs Berkeley Mono — Real Code
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Live Text Comparison Slider
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Courier New 
const specimen = {
  zeroes: [0xFC82, 100_000, 0.0],
  glyphs: "g k r y  Q @ $",
  ops: ["!=", "==", "===", "<=", ">=", "=>", "->", "::", "&|"],
  nested: "{ ( [ ] ) }  * ^ -",
};
export const render = (q: Map<string, number>) => {
  if (q.size != 0 && q.get("gkry") >= 0.0) return `Q::$${q.get("@$")}`;
  return specimen.nested;
};
Ioskeley Mono 
const specimen = {
  zeroes: [0xFC82, 100_000, 0.0],
  glyphs: "g k r y  Q @ $",
  ops: ["!=", "==", "===", "<=", ">=", "=>", "->", "::", "&|"],
  nested: "{ ( [ ] ) }  * ^ -",
};
export const render = (q: Map<string, number>) => {
  if (q.size != 0 && q.get("gkry") >= 0.0) return `Q::$${q.get("@$")}`;
  return specimen.nested;
};

Try It

Sample 

      

        
        
      

    

    

      Ioskeley Mono
      JavaScript
    

  


  


  
  
Optical Size Waterfall

  
Engineered geometric rhythm and uncompromised hinting preserved across all display scales.

  

    

      32px
      Ioskeley Mono — geometric monospace
    

    

      24px
      const specimen = render({ mono: true, weights: 10 });
    

    

      18px
      fn verify_parity(origin: Point, baseline: f64) -> Result<Diff>
    

    

      14px
      export async function loadBuffer(q: Map<string, number>) => `Q::${q.get("@$")}`
    

    

      12px
      0123456789 != == === -> => >= <= {} [] () <> /* !@#$%^&* */ 0xFC82 100_000 0.0
    

    

      10px
      drwxr-xr-x  12 user staff 384 May 26 23:40 Cargo.lock (98752 iTerm2 2.3% 1.2% VSZ 4284956)
    

  


  


  
  
Download Packages

  
Not sure which file? Start with IoskeleyMono.zip.


  
  

    

      
★ Recommended

      
IoskeleyMono.zip

      
Standard font package for code editors & IDEs. Full ligatures and full 10-weight axis.

      

        VS Code
        Zed
        JetBrains
        Sublime
      

      Download TTF →
    


    

      
Icons

      
IoskeleyMono-NerdFont.zip

      
Patched with Nerd Font v3 symbols for developer shells, Starship prompts, and Neovim.

      

        Neovim
        Starship
        zsh / fish
      

      Download Nerd Font →
    


    

      
Terminal Grid

      
IoskeleyMono-Term.zip

      
Strict terminal spacing constraints for strict cell alignment in Kitty, Ghostty, and WezTerm.

      

        Kitty
        Ghostty
        WezTerm
      

      Download Term →
    

  


  
  

    
      
FileBest forDownloads

    
    
      

        IoskeleyMono-NL.zip
        Apps that can't disable ligatures — Xcode
        —
        Download →
      

      

        IoskeleyMono-NL-NerdFont.zip
        Same, with Nerd Font icons
        —
        Download →
      

      

        IoskeleyMono-Web.zip
        Web / CSS — small subset, WOFF2 for @font-face
        —
        Download →
      

      

        IoskeleyMono-Web-Full.zip
        Web / CSS — full coverage (Greek, Cyrillic, long arrows)
        —
        Download →
      

    
  


  
  

    
Editor & Terminal Setup

    
Copy-paste ready configs for your daily environment.

    

      

        
        
        
        
        
        
        
      

      

        
        

      

    

  


  


  
  
Weights Spectrum

  
Every weight available in Normal and SemiCondensed — each with a matching italic.

  

    
WeightCSSSample

    
      
Thin100The quick brown fox

      
ExtraLight200The quick brown fox

      
Light300The quick brown fox

      
SemiLight350The quick brown fox

      
Regular400The quick brown fox

      
Medium500The quick brown fox

      
SemiBold600The quick brown fox

      
Bold700The quick brown fox

      
ExtraBold800The quick brown fox

      
Black900The quick brown fox

    
  


  


  
  
Glyphs & Symbols


  

    
Pangrams

    

The quick brown fox jumps over the lazy dog.
The five boxing wizards jump quickly.
Pack my box with five dozen liquor jugs.
Sphinx of black quartz, judge my vow.
How vexingly quick daft zebras jump!
私のクローゼットには、青いスカートと白いブラウスしかない。
    

  


  

    
Numerals & Punctuation

    

      01234
      56789
      !?.,;
      :'"()
      []{}<>
      #%&@$
    

  


  

    
Ligatures & Operators

    

      →⇒≥≤≠
      ==!==>->=>
      <=>=<<>>::
      ///**/+=-=
      *=/=++--=>
    

  


  

    
Box Drawing & Geometric Elements

    

┌───┬───┬───┐   ┏━━━┳━━━┳━━━┓   ╔═══╦═══╦═══╗
│   │   │   │   ┃   ┃   ┃   ┃   ║   ║   ║   ║
├───┼───┼───┤   ┣━━━╋━━━╋━━━┫   ╠═══╬═══╬═══╣
│   │   │   │   ┃   ┃   ┃   ┃   ║   ║   ║   ║
└───┴───┴───┘   ┗━━━┻━━━┻━━━┛   ╚═══╩═══╩═══╝
  ▲ ▼ ◀ ▶   █ ▓ ▒ ░   ● ○ ◉ ◎   ← ↑ → ↓   ▸ ▹ ▸ ▹
    

  


  


  
  
Installation Guide

  

    

      
      
      
      
    

    

      
    
        
  1. Download and unzip IoskeleyMono.zip
    2. 
        
  2. Open Normal/Unhinted/ (recommended for Retina / high-DPI Mac displays)
    3. 
        
  3. Select all .ttf files, double-click any font → Install Font, or drag them all into Font Book
    4. 
      

    

    

      
    
        
  1. Download and unzip IoskeleyMono.zip
    2. 
        
  2. Open Normal/Hinted/ (optimized for Windows ClearType / standard-DPI displays)
    3. 
        
  3. Select all .ttf files → Right-click → Install for all users
    4. 
      

    

    

      
    
        
  1. Download and extract your chosen zip file
    2. 
        
  2. Copy font files to user font directory:
          
    mkdir -p ~/.local/share/fonts/IoskeleyMono
cp Normal/Unhinted/*.ttf ~/.local/share/fonts/IoskeleyMono/
    
        
    3. 
        
  3. Refresh font cache:
          
    fc-cache -fv
    
        
    4. 
      

    

    

      

Normal/
  Hinted/     ← ClearType / standard-DPI screens (Windows)
  Unhinted/   ← High-DPI / Retina screens (macOS, Linux HiDPI)
SemiCondensed/
  Hinted/
  Unhinted/
      

      
Every package includes all widths and hinted/unhinted variants. Installing all files in your chosen folder exposes the complete 10-weight axis automatically.

    

  


  


  
  
Build from Source

  
Ioskeley Mono builds are fully automated via GitHub Actions on tagged releases. To compile locally:

  

    

      Prerequisites: Node.js 18+, npm, Git
    

    
# 1. Clone repository and upstream Iosevka
git clone https://github.com/ahatem/IoskeleyMono.git
git clone --depth 1 https://github.com/be5invis/Iosevka.git

# 2. Copy the customized build plan
cp IoskeleyMono/private-build-plans.toml Iosevka/

# 3. Install build tools and compile fonts
cd Iosevka
npm install
npm run build -- contents::IoskeleyMono contents::IoskeleyMonoTerm

    

      Output binaries: Iosevka/dist/IoskeleyMono/ and Iosevka/dist/IoskeleyMonoTerm/