AC4 file format description

Many people share .ac4 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ac4 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ac4 files.

2 filename extension(s) found in our database.

.ac4 - Clone Manager Compare Results Data

The AC4 data files are related to Clone Manager. The AC4 file is a Clone Manager Compare Results Data. Clone Manager is a commercial bioinformatics software work suite of Sci-Ed.

Clone Manager
Data files
- / -
Clone Manager Compare Results Data related extensions:
PISnoop Workspace Data
HITRAN Binary Output
ComputerEyes Output Animation Data
Bean XML Data
Kodak EasyShare Thumbnail Cache
Poser Props Data

.ac1 - SPICE AC/Frequence Data

The AC1 data files are related to SPICE. The AC1 file is a SPICE AC/Frequence Data. SPICE (Simulation Program with Integrated Circuit Emphasis) is a widely-used circuit simulation program. It was developed as public domain software at the University of California and versions 2G6 (vanilla SPICE) and 3.0 are still used.

Data files
- / -
ac2, ac3, ac4, ac5, ac6, ac7, ac8, ac9
SPICE AC/Frequence Data related extensions:
SPICE AC/Frequence Data
SPICE Common Simulation Data Format File
SPICE Initial Condition Data
SPICE Status Data
SPICE Sweep Operations Output Data

Naturally, other applications may also use the .ac4 file extension. Even harmful programs can create .ac4 files. Be especially cautious with .ac4 files coming from an unknown source!

Can't open a .ac4 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 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 one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .ac4 file extension is often given incorrectly!

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

ac, ace, acr, act, ad4, af4, as4, ax4, c4, ca4, wc4

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

GNU Autoconf Input File
OptionVue Portfolio Manager Account Data
CaseWare Working Papers Client File
Adobe Photoshop Color Table
WinAce Archive
Tablet Assembly Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you have useful information about the .ac4 file format, then write to us! >> AC4 file