133

.133Amiga 133

Commodore · 1985

Developer
Commodore
Category
Images
MIME Type
image/x-amiga-133
First Released
1985
Open Format
Yes
File Signature
Not a consistently defined, universally recognized header signature for all .133 files; often relies on context and companion data.
At a Glance
.133
Amiga 133

Amiga 133 is a classic bitmap image format used on Commodore Amiga computers.

Reviewed on April 30, 2026
Compression
None (typically)
Transparency
No
Editability
Low (requires Amiga-specific software or emulators)
Best for
Amiga-native visuals

Key Features

  • Native Amiga bitmap image format.
  • Stores raw pixel data and color information.
  • Optimized for Amiga's graphics capabilities.
  • Represents early computer graphics history.

Best For

  • Preserving Amiga-specific graphics.
  • Displaying images within Amiga emulators.
  • Historical archiving of Amiga visuals.

Less Ideal For

  • Modern web graphics.
  • High-quality photography.
  • Cross-platform compatibility.
  • Vector graphics or animations.

Common Use Cases

  • Storing graphics for Amiga games and applications.
  • Archiving early digital artwork created on Amiga.
  • Image formats used in Amiga system software.
  • Sharing images between Amiga programs.

How to Open It

  1. Use an Amiga emulator like FS-UAE or WinUAE and open the image within an Amiga application (e.g., Deluxe Paint).
  2. Convert the file using specialized Amiga image converters available online or as desktop software.
  3. Open in a cross-platform image viewer that supports older Amiga formats, such as XnViewMP.

What is a .133 file?

The .133 file extension is associated with the Amiga computer system, specifically for storing graphical images. It's a native image format used by the Amiga operating system and its applications, often encountered in the context of early computer graphics and game development. These files typically contain bitmap data, and their structure is optimized for the Amiga's custom graphics hardware. While not widely used on modern systems, they represent a piece of computing history from the 1980s and early 1990s.

Programs That Open .133 Files

PlatformProgram
WindowsFS-UAEFree
WinUAEFree
XnView MPFree
macOSFS-UAEFree
XnView MPFree
LinuxFS-UAEFree
XnView MPFree
AndroidUAE4DroidFree
Web BrowserOnline Amiga emulators (various)Free

How to Convert .133 Files

FormatMethod
.PNGAmiga emulator with Deluxe Paint or similar, XnView MP, Online converters
.JPGAmiga emulator with Deluxe Paint or similar, XnView MP, Online converters

Common Problems with .133 Files

⚠️ Cannot open .133 files on modern operating systems directly.
Use an Amiga emulator or a specialized image viewer/converter like XnView MP.
⚠️ Color depth or palette issues when converting.
Ensure the conversion tool or emulator settings match the original Amiga's display capabilities or desired output.

Frequently Asked Questions

What is a .133 file?

.133 is an image file format native to the Commodore Amiga computer, used for storing bitmap graphics.

Can I open .133 files on Windows or Mac?

Yes, typically by using an Amiga emulator or specific image viewing software like XnView MP.

Is .133 a compressed format?

Usually, no. .133 files store raw bitmap data without significant compression, though variations might exist.

Technical Details

Amiga 133 files store raw bitmap data, often with custom color palette information. The exact pixel data arrangement can vary depending on the specific Amiga graphics modes and color depths supported. They are typically uncompressed binary files. Header information usually defines the image dimensions and color depth.

Did You Know?

The '.133' extension might relate to the Amiga 1000's color capabilities or graphics modes.
This format was common in the era of early home computers and game development on the Amiga platform.

Security Information

Like most image files, .133 files are generally safe, but avoid opening them from untrusted sources, as with any file type, to prevent potential exploitation of vulnerabilities in image rendering software.

Related Extensions