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

Details of extension .ac

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

Below, you can find answers to the following questions:

  • What is the .ac file?
  • Which program can create the .ac file?
  • Where can you find a description of the .ac format?
  • What can convert .ac files to a different format?
  • Which MIME-type is associated with the .ac extension?
GNU Autoconf Input File .ac file icon

GNU Autoconf Input File

The 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.
Category: Development files
Application: GNU Autoconf
Program name: -
Mime-type: text/plain
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
.mo Modula-3 Compiled Object
.awk AWK Script
.asi Assembly Include File
.s43 IAR System MSP430 Assembly Source Code
.def C++ Definition File
CaseWare Working Papers Client File .ac file icon

CaseWare Working Papers Client File

The AC file is a CaseWare Working Papers Client File. Caseware Working Papers is a financial management and reporting software package.
Category: Data files
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
.csp CaseWare Working Papers Script Page
.vtb CaseWare Working Papers Layout Document
.ac_ CaseWare Working Papers Compressed Client File
.cdl CaseWare Working Papers Document
AC3D Model .ac3d file icon

AC3D Model

The AC3D file is an AC3D Model. AC3D is a powerful, easy to use and affordable, professional 3D software design package. Available for Windows, Mac and Linux,
Category: Document files
Application: AC3D
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
.ws3 Rhino 3D Toolbar Collection Data
.a3d Amapi Designer 3D Model
.jt JT Open 3D Model
.tb Rhino 3D Toolbar Data
.dff RenderWare 3D Model

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

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

.ad After Dark Screensaver
.av Final Draft AV v1 Document
.xc RSNetWorx Configuration
.as Adobe Flash ActionScript
.ax Modula-3 Linker Information
.zc ZipKey Settings

The .ac filename extension is often given incorrectly!

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

xc (1), qc (1), ax (1), as (1), ad (1), zc (1), wc (1), ca (1), av (1), af (1)

Can't open a .ac file?

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

Windows can't open this file:


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 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android