Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .a1

1 extension(s) and 1 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .a1 file?
  • Which program can create the .a1 file?
  • Where can you find a description of the .a1 format?
  • What can convert .a1 files to a different format?
  • Which MIME-type is associated with the .a1 extension?
Free Pascal Compiled Archive .a1 file icon

Free Pascal Compiled Archive

The A1 file is a Free Pascal Compiled Archive. Free Pascal is a free, portable, open source, Pascal and Object Pascal compiler.
Detailed description not available
Category: Development files
Application: Free Pascal
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
FreePascal Compiled Unit
FreePascal GO321v1 Compiled Unit
FreePascal Object
FreePascal Compiler Makefile
Free Pascal Compiled Unit
Free Pascal Assembler Data
Free Pascal Archive
Free Pascal Object File for GO321v1 Platform
OpenEdge ABL After Image .ai file icon

OpenEdge ABL After Image

The AI file is an OpenEdge ABL After Image. OpenEdge Advanced Business Language is a business application development language created and maintained by Progress Software Corporation (PSC).
Detailed description not available
Category: Development files
Application: Progress OpenEdge
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
a1, a2
Related extensions:
Hypertext Markup Language Document
Extensible Markup Language File
Web Services Description Language Document
OpenEdge Web Services Application Descriptor
Visual Studio .NET Dynamic Discovery Data
Visual Studio .NET Web Information Data
Visual Studio .NET Resources Data
Visual Studio .NET Discovery Data
OpenEdge ABL Procedure File

Other types of files may also use the .a1 file extension. If you have helpful information about .a1 extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

A-Law Compressed Audio File
Ancestral Quest Database
Answer Wizard Index
WinAMP Equalizer Presets
X1 Saved Search
ZoneAlarm MailSafe Renamed VB File

The .a1 filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

al (1), z1 (1), q1 (1), aq (1), x1 (1), aw (1)

Can't open a .a1 file?

If you want to open a .a1 file on your computer, you just need to have the appropriate program installed. If the .a1 association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.a1

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android