A daily updated filename extension database!

AC file extension

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

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

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

2 extension(s) and 0 alias(es) found in database

✅ GNU Autoconf Input File

AC file is a GNU Autoconf Input File. Autoconf is a tool for producing shell scripts that automatically configure software source code packages to adapt to many kinds of UNIX-like systems.
Application: GNU Autoconf
Mime-type: text/plain
Magic number: -
Magic string: -
Sample: -
AC aliases:
AC related links:
AC related extensions:
Assembly Source Code

C Source Code

C++ Source Code

Visual C++ Dialog

Fortran Source Code

C Header File

Microsoft Visual Studio Workspace Options

Modula-3 Source Code

Pascal/Delphi Source Code

Visual C# .NET Class

✅ CaseWare Working Papers Client File

AC file is a CaseWare Working Papers Client File. Caseware Working Papers is a financial management and reporting software package.
Category: Data files
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
AC aliases:
AC related links:
AC related extensions:
CaseWare Working Papers Compressed Client File

CaseWare Working Papers Layout Document

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

🚫 The .ac file extension is often given incorrectly!

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

ad, af, as, av, ax, ca, qc, wc, xc, zc

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Final Draft AV v1 Document
Total Commander Directory Tree
Adobe Flash ActionScript
DirectShow Filter Plugin
RSNetWorx Configuration
After Dark Screensaver
DSM Application Diagram
Initial Telnet Cache
OpenSSL Certificate Authority Data
ZipKey Settings

🔴 Can't open a .ac 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:


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 .ac 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 .ac file extension, write to us!

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