afo

.afo — ASCII Font

Various · 1980s

Developer
Various
Category
Fonts
MIME Type
application/octet-stream
First Released
1980s
Open Format
Yes
File Signature
Not applicable (plain text format)
At a Glance
.afo
ASCII Font

An AFO file is a plain text-based font format, primarily used in older systems for its simplicity and readability.

Reviewed on June 8, 2026
Compression
Plain text
Transparency
N/A
Editability
High
Best for
Simple pixel fonts

Key Features

  • Plain text ASCII structure for easy readability and editing.
  • Simple grid-based or line-based character definitions.
  • Low resource requirements, suitable for older systems.
  • Human-readable format, aiding in understanding font creation.

Best For

  • Simple, monospaced pixel fonts.
  • Applications requiring highly readable font data.
  • Retro computing environments with limited capabilities.
  • Quick font editing using standard text tools.

Less Ideal For

  • High-resolution or scalable vector graphics.
  • Complex typographic features like kerning and ligatures.
  • Modern operating system font rendering.
  • Web design or cross-platform compatibility.

Common Use Cases

  • Displaying custom fonts in legacy software.
  • Creating simple, pixelated fonts for retro games.
  • Prototyping font designs in a text-based environment.
  • Educational purposes for understanding basic font encoding.

How to Open It

  1. Open with any plain text editor (Notepad, TextEdit, VS Code, Sublime Text).
  2. Some older DOS-based or retro computing emulators may directly support AFO fonts.
  3. Specialized font editors for legacy formats might offer import options.
  4. Copy and paste the text content into a new file with a .afo extension.

What is a .afo file?

An AFO file is a simple text-based font file format used in some older computer systems and applications. It stores font information in plain ASCII characters, making it easily readable and editable with basic text editors. Unlike modern font formats that use complex binary structures, AFO files define characters through a grid of dots or lines represented by text characters. This approach was common in early computing when resources were limited and simple, human-readable formats were preferred. While not widely used today, AFO files can still be encountered in retro computing or specialized applications.

Programs That Open .afo Files

PlatformProgram
WindowsNotepadFreeOfficial
Notepad++Free
macOSTextEditFreeOfficial
BBEditPaid
LinuxgeditFreeOfficial
VimFreeOfficial
AndroidQuickEdit Text EditorFree
iOSTextastic Code EditorPaid
Web BrowserGoogle DocsFree

How to Convert .afo Files

FormatMethod
.PNGGraphics software with import features, Custom scripts
.TXTSave As in text editor

Common Problems with .afo Files

⚠️ File not displaying correctly.
Ensure the file is pure ASCII text and the character definitions match the expected grid or line format of the application trying to use it. Check for stray characters or incorrect line breaks.
⚠️ Application does not recognize the AFO file.
Verify that the application specifically supports the AFO format or a compatible text-based font format. Some applications may require specific AFO variations or configurations.

Frequently Asked Questions

Is AFO a modern font format?▼

No, AFO is a legacy font format, primarily used in older systems due to its simple, text-based nature.

Can I use AFO files on my current operating system?▼

Generally, no, not directly. Modern OSes use formats like TTF and OTF. You might need specialized software or emulators that support AFO.

How do I edit an AFO file?▼

You can edit an AFO file using any standard text editor, as it's composed of plain ASCII characters.

Technical Details

AFO files are structured as plain text, where each character in the font is defined by a series of lines or a dot matrix representation. These representations use ASCII characters to draw the glyphs, typically with spaces for empty areas and specific characters for solid parts. The overall structure is straightforward, allowing for easy parsing and manipulation without specialized software.

Did You Know?

The simplicity of AFO files allowed them to be easily transmitted over slow dial-up connections or stored on very limited storage media.
Some early video games used AFO-like formats to store character graphics directly within the game's executable or data files.

Security Information

AFO files are plain text and generally considered safe. However, as with any file, be cautious if downloading from untrusted sources, as malicious scripts could theoretically be embedded in text files, although this is uncommon for font formats.