v0.5.0 · released 8 October 2026 · MIT

Download Fahh Editor.

Free, open source, and fully local: no account, no server. Published by Stealth Keqing.

Choose your platform All release files

The installers are not code-signed yet, so Windows and macOS ask before the first launch. The steps are under each download.

[Platforms]

Pick your system.

Windows

your system

x64 // Windows 10 and 11 // WebView2

SmartScreen shows "Windows protected your PC": choose More info, then Run anyway. The .exe installs for your user account only, without administrator rights.

macOS

your system

Apple silicon and Intel // .dmg

Gatekeeper blocks the first launch of an unsigned app: right-click Fahh Editor in Applications, choose Open, then Open again.

[From a terminal]

Or skip the browser.


        

      

    


    

      

        

          [In 0.5.0]
          
What you get today.

        

        

          

            
Works

            
    
              
  • Monaco, the editor inside VS Code, with tabs and Ctrl+S
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  • Diagnostics from 18 language servers, and the sound
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  • Previews for Markdown (live, scroll-synced), HTML, images, SVG and CSV
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  • A built-in browser for localhost: open the dev server your terminal just started
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  • AI panel for any OpenAI-compatible endpoint, with Apply-to-file for code blocks
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  • Quick Open (Ctrl+P), and a terminal where cd sticks
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  • File tree with create, rename and delete
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  • Terminal, and a Run panel for 19 languages (their runtimes installed)
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  • Git: status, diff, stage, unstage, commit
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  • Six themes, a first-run welcome, and an optional-tools installer
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In progress

            
    
              
  • Completion, hover and go-to-definition from the language servers
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  • The step-through debugger (the panel is there; the event handling is not finished)
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  • Code signing for the installers
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        [Not ready to install?]
        
Try it in the browser.

        
The playground runs Python (with Pyodide), JavaScript and TypeScript on this page, and plays the sound when your code throws.

        

          Open the playground
          Try the simulator