Opening APA Files

The APA file type is primarily associated with ArcPad.

APA	File extension: APA
	File type:	applet

What is an APA file

APA files mostly belong to ArcPad by ESRI. An APA file is an applet used by ArcPad field mapping application for Trimble handheld devices. An applet is a small program which performs a specific task through the web interface of a device. Another type of APA file is a project archive created by the discontinued RSView Studio human-machine interface design program.

How to open APA files

You need a suitable software like ArcPad to open an APA file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your APA file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a APA file directly in the browser:. Just drag the file onto this browser window and drop it.

Online APA Text Viewer

Choose your .apa file to analyze

or drag and drop it here

Online File Viewer

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APA file format details:

To find out what program is needed to open APA files, you need to determine the file format. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. If the file extension or signature does not match the file format, errors will occur when opening or editing the file. So you need a detailed analysis of a file to find out the format and the associated program. In the following you will find our evaluation of the APA files:

The APA file extension is not widely used. Such a file covers different formats for different programs. The file formats most commonly found in APA files are:

• 45% of all APA files are based on the Microsoft Compound File format, which is also known as Compound File Binary File format (CFBF or CFB) or OLE2 Compound Document format. Compound document files work similarly to real file systems. They contain a number of independent data streams (like files in a file system) which are organized in a hierarchy of containers (like sub-directories in a file system). Compound files begin always with signature bytes D0 CF 11 E0 A1 B1 1A E1 (ÐÏࡱá). There is also a unique Windows component object identifier (CLSID) which is be87c5e3-e3cb-4bab-8427-578ecce263f7. The file contains several sections with names like AppFile, HMIServer, DIRSIZE_INFORMATION, PRODUCT_VERSION_INFORMATION, RNAEntry, TargetPlatform, VERSION_INFORMATION and FTSPHasPwd. APA files are between 1 MB and 9 MB in size. The file type was created 10 years ago, but is still used today.
• 7% of all APA files use the same file format, which can be identified by the letters " Authenticus Export - APA Style v6.0 " at the beginning. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. APA files can be up to 360 bytes in size, but are often around 220 bytes - 310 bytes. The keywords (2020) and Authenticus Export - APA Style v6.0 are typical for these files. These files are often associated with authenticus and export.

All other APA files (48%) have no uniform format, often, for example, ArcPad Applet. These files are often connected to assignment or path. If you want to find out which format your APA file belongs to, just click on the button "Choose your .apa file to analyze".