Opening a UCF File

The UCF file type is primarily associated with WebEx.

UCFFile Extension UCF
File extension: UCF
File type:  meeting session media data

What is a UCF file?

UCF files mostly belong to WebEx by Cisco. A UCF file contains media data shared between participants during a meeting session on WebEx video conferencing platform. The UCF file is saved in Universal Communications Format which is used to display rich media such as documents, video/audio recordings, presentations, and spreadsheets. Another type of UCF file is a macro used to automate processes in Statistica data analysis software. UCF is also the filename extension of the configuration data file for workspace variables used by MicroStation CAD and GIS software. WAsP wind turbine resource assessment and yield calculation software suite uses a UCF file to store wind speed/direction correction factors.

How to open a UCF file

You need a suitable software like WebEx to open a UCF 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 UCF file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a UCF file directly in the browser:. Just drag the file onto this browser window and drop it.

Online UCF Text Viewer

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Programs that open and convert UCF files:

  1. WebEx by Cisco
    See the previous paragraphs to learn more about the main application. UCF files are often referred to as WebEx web (source)s because this type of file is primarily created or used by this software.
  2. Epson Printers (personal settings) by Epson
    Various printers manufactured by Epson use personal settings saved in a UCF file. This file format is classified as Settings.
  3. Xilinx Foundation (user constraints) by Xilinx
    Xilinx Foundation is a discontinued software for designing and fabricating avionics circuitry. This application uses a UCF file to store user constraints. This file format is classified as Data.

UCF file extension format:

The file format determines how the data is stored in the file. The file format can be determined based on the file extension and the signature (the first few characters of a file). File extension, signature and file format must match; otherwise errors will occur when the file is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below you will find our evaluation of the UCF files:

The UCF file type is a very commonly used file extension and is primarily used by a single program. The two most common formats are as follows:

The remaining 15% of all UCF files are files with no common format, such as Xilinx User Constraints File, Source and NET. They are often associated with shortcutsfile, template, config or class. Drag & drop your file here to see the file format and a preview of your UCF file!

Technical Data for UCF File Extension

File classification:
Web (source)
Related files:
usf, aucf, v, nri, wat, vhdl, vhd, pdf, uxf, zip, jpg, wbt, arf, wcf
Mime type:

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: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\320\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\324\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\320\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\Downlo~1\Webex\321\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\326\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\426\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\326\atshell.exe %1

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\MOZILL~1\plugins\WebEx\424\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\424\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\MOZILL~1\plugins\WebEx\426\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\324\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\430\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\424\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\MOZILL~1\plugins\WebEx\524\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\426\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\425\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\425\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\624\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\Document Suite\atdoced.exe

ProgramID: UUSEE.ucf
EXEFile: %ProgramFiles%\uusee\UUSeePlayer.exe -file

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\webex\430\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\630\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\724\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %SystemRoot%\DOWNLO~1\WebEx\626\atshell.exe

ProgramID: Universal Communication Format
EXEFile: %ProgramFiles%\WebEx\WebEx\724\atshell.exe


a ucf meeting session media data is a special file format by Cisco and should only be edited and saved with the appropriate software.

How to solve problems with UCF files

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