Opening TAC Files

The TAC file type is primarily associated with Cisco.

TAC	File extension: TAC
	File type:	configuration file

What is a TAC file?

TAC files mostly belong to Cisco. Your TAC file may belong to one of several distinct systems. The most common use is as a Cisco Aironet configuration file that supports TACACS+ for device authentication and network management. In this case the file stores commands and settings used by Cisco wireless products. You can view its plain text content with a simple editor. For more details see Cisco’s support page.
Other uses include:

Compressed Archive: A file container (often called TarArc) used by some game software to store data.
Football Manager Tactic: A file that holds strategic or formation data for sports simulation games.
Game Character or Combat Data: Used in titles such as Total Annihilation or Championship Manager to save in-game player or combat information.
Time-Activity Curve: A data file used in performance or research software (refer to PMOD for example).
Train And Character File: Found in simulation software like Trainz Simulator to manage terrain or character data (Trainz Portal).
Theora Video File: A variant where the TAC file contains compressed video data playable in tools like VLC (VLC media player).

FilExt.com tip: Each TAC file’s structure is defined by its producing application. If you are unsure of its origin, try opening it in a simple text editor to look for readable commands or headers, then check the documentation for that specific software.

How to open a TAC file

You need a suitable software like Cisco to open a TAC file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your TAC file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a TAC file directly in the browser:. Just drag the file onto this browser window and drop it.

Online TAC Text Viewer

Choose your .tac file to analyze

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

Programs that open and convert TAC files:

Cisco
See the previous paragraphs to learn more about the main application. TAC files are often referred to as Cisco settings because this type of file is primarily created or used by this software.
JSim (Time Activity Curve File) by University of Washington
JSim is a Java-based simulation system for building quantitative numeric models and analyzing them with respect to experimental reference data. JSim's primary focus is in physiology and biomedicine, however its computational engine is quite general and applicable to a wide range of scientific domains. JSim models may intermix ODEs, PDEs, implicit equations, integrals, summations, discrete events and procedural code as appropriate. JSim's model compiler can automatically insert conversion factors for compatible physical units as well as detect and reject unit unbalanced equations. JSim also imports the SBML and CellML model archival formats. JSim should not be confused with J-Sim (formerly known as JavaSim). These files are tab-delimited ASCII. This file format is classified as Text. Related links: JSim Data Sets Page

TAC file extension format:

The file format determines how the data is stored in the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. Knowledge is power - this also applies when dealing with unknown or faulty files. Below is our analysis of the TAC files:

You will often come across the TAC file type. This includes various formats for various programs. The two most common formats are as follows:

30% of all TAC files start with the bytes 15 79 21 61 D8 5A B3 9C 7D EE B8 E8 33 47 CE 22, which are crucial for this file format. These files are binary files, so they do not contain text, but only cryptic characters. The average file size is 15 KB with most files being between 6 KB and 64 KB in size. This file type is new and state-of-the-art.
15% of all TAC files start with the bytes TArc1.10 crucial for this file format. They consist of illegible, cryptic characters. The files are often between 5 MB and 890 MB in size. The keywords TArc1.10 are typical for these files. Some examples of file names are datascn.tac or datapic.tac. Files like these are about mus, datavoc, datase and data.

The remaining 55% of all TAC files are files with no common format, often e.g. Ogg, cat and import. They are often associated with common, tiki, tactic, disk, charsfx, custom or wide. Just click the "Choose your .tac file to analyze" button on this page to find out what your TAC file is.

Technical Data for TAC File Extension

File classification:

Settings

Related files:

conf, tad, fmf, zip, tak, exe, tcd, txt, rar, pdata, jsml, ldata, cfg, ini, tar, dat, xml, log

Related links:

JSim Data Sets Page

Mime type:

text/x-python

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: Tactician.Document
EXEFile: C:\TACTICN\T5200STN.EXE

a tac configuration file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with TAC files

Associate the TAC file extension with the correct application.
Update your software that should actually open configuration files. Because only the current version supports the latest TAC file format. Search, therefore, e.g. on the manufacturer website after an available Cisco update.
To make sure that your TAC file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .TAC file online - secure, fast, and no downloads needed.