AB3I File

What are AB3I files and how to open them

Are you having problems opening an AB3I file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your AB3I files.

What is an AB3I file?

An .AB3I file is an AmiBlitz3 Image Bitmap file.

AmiBlitz3 Image Bitmap (.AB3I) is a bitmap image format produced by AmiBlitz3, a BASIC compiler and Integrated Development Environment for the Amiga platform. Developers writing programs in AmiBlitz3 can save graphics - such as shapes, sprites, or user-created images - into .AB3I files. These files serve as bitmaps to be loaded and manipulated within AmiBlitz3 code, typically shown in windows or drawn onto screen bitmaps.

Programs using AmiBlitz3 can then read .AB3I files via the image handling functions supplied in its distribution, especially those provided in the image.include.ab3 include file. These functions allow loading, displaying, altering, and saving .AB3I bitmaps in various graphics routines. The format supports use of chunky graphics formats and functions under AmiBlitz3 that use underlying Amiga graphics.library calls.

Files in this format begin with the ASCII signature "AB3I" at offset 0 (bytes 0x41 0x42 0x33 0x49).

How to open AB3I files

Important: Different programs may use files with the AB3I file extension for different purposes, so unless you are sure which format your AB3I file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 16, 2026

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about AB3I file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.