A1 file - How do I open a .a1 file?

The table below provides useful information about the .a1 file extension. It answers questions such as:

• What is the .a1 file?
• What program do I need to open a .a1 file?
• How can the .a1 file be opened, edited or printed?
• How can I convert .a1 files to another format?

We hope you find this page helpful and a valuable resource!

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

✅ Free Pascal Compiled Archive

.a1

Description:
The A1 file is a Free Pascal Compiled Archive. Free Pascal is a free, portable, open source, Pascal and Object Pascal compiler.

The A1 format description is not yet available

Category: Development files

Application: Free Pascal

Mime-type: application/octet-stream

Magic number: -

Magic string: -

Sample: -

A1 aliases:

-

A1 related links:

-

A1 related extensions:

.ppu

FreePascal Compiled Unit

.pp1

FreePascal GO321v1 Compiled Unit

.oo

FreePascal Object

.fpc

FreePascal Compiler Makefile

.ppo

Free Pascal Compiled Unit

.sw

Free Pascal Assembler Data

✅ OpenEdge ABL After Image

.ai

Description:
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).

The AI format description is not yet available

Category: Development files

Application: Progress OpenEdge

Mime-type: application/octet-stream

Magic number: -

Magic string: -

Sample: -

AI aliases:

a1, a2

AI related links:

-

AI related extensions:

.htm

Hypertext Markup Language Document

.xml

Extensible Markup Language File

.wsdl

Web Services Description Language Document

.wsad

OpenEdge Web Services Application Descriptor

.vsdisco

Visual Studio .NET Dynamic Discovery Data

.webinfo

Visual Studio .NET Web Information Data

Other types of files may also use the .a1 file extension.

🚫 The .a1 file extension is often given incorrectly!

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

🔴 Can't open a .a1 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:

example.a1

To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .a1 file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .a1 file extension, write to us!