APT File

What are APT files and how to open them

Are you having problems opening an APT file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an APT file?

APT files have multiple uses, and Adaptive Prediction Tree Encoded Bitmap is one of them. Read more about the other uses further down the page.

Adaptive Prediction Tree Encoded Bitmap

When an image needs compression to save space, one process used is APT. The files created in the process are called .apt files. APT stands for Adaptive Prediction Tree. There are two types of image compressions for .apt files: A lossless image is a compressed image with no data from the original image discarded, and a lossy image is a compressed image with data from the original image discarded. The image quality is the same as the original for lossless compression, where lossy compression sacrifices image quality for improved space savings.

John Robinson, a researcher who focuses on image processing and analysis, developed the APT compression method.

How to open APT files

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

While we have not verified the apps ourselves yet, our users have suggested ten different APT openers which you will find listed below.

Last updated: January 13, 2023

All known file formats using extension .APT

While Adaptive Prediction Tree Encoded Bitmap is a popular type of APT-file, we know of 3 different uses of the .APT file extension. Different software may use files with the same extension for different types of data.

Android PandaHome Theme

A .apt file is a theme file created by the Android PandaHome. PandaHome is an Android-based application used to change themes. A theme pertains to the appearance of your Android device's look. PandaHome changes font styles, icons, wallpapers, etc that are included in the theme.

More file formats using the APT extension

Through our research of APT files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Team Developer / SQLWindows Application

Various apps that use files with this extension

These apps are known to open certain types of APT files. Remember, different programs may use APT files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Alienware Command CenterAlienware Command CenterVerified
IBM Lotus ApproachIBM Lotus ApproachDiscontinued
Altium DesignerAltium DesignerUser submitted
ACDSee Photo EditorACDSee Photo EditorUser submitted
AutoPlay Media StudioAutoPlay Media StudioUser submitted
ECAD dioECAD dioUser submitted
Aspen PlusAspen PlusUser submitted
Price-SurferPrice-SurferUser submitted
Lotus ApproachLotus ApproachUser submitted
ECAD/dioECAD/dioUser submitted

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 APT file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.