Basic information about 123 file

When there is a problem with opening files with the file extension 123（*.123 or *.123）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the 123 file yourself.

There are 2 file types using the 123 file extension in our database. In the further part of this page, you will find detail information about all the 123 file with their brief description and a list of programs that support 123 file sorted by operating systems. The table below provides useful information about the 123 file extension. It answers questions such as:
  • What is the 123 file?
  • How to open a 123 file?
  • What programs do I need to open a 123 file?
  • What programs help to create and edit a 123 file?
  • How to convert 123 files to another file format?
  • How to convert another files to 123 file format?


1.Detail information about 123 file extension: Lotus 1-2-3 Spreadsheet

File type Lotus 1-2-3 Spreadsheet Category Spreadsheet Files
Developer IBM File format Binary
Description 123 file is a Lotus 1-2-3 Spreadsheet developed by IBM. Spreadsheet created by Lotus 1-2-3, part of IBM Lotus SmartSuite; organizes data in rows and columns; functions can be applied to the data in various cells, which can automatically populate the data in other cells.
Software programs that will open, edit or convert 123 files

Windows		 IBM Collaboration Solutions
Corel Quattro Pro X8
Apache OpenOffice
Gnumeric
Lotus 1-2-3
WordPerfect Offic

macOS		 Planamesa NeoOffice
Apache OpenOffice

Linux		 Apache OpenOffice
Gnumeric


2.Detail information about 123 file extension: PCB123 Circuit Board Design

File type PCB123 Circuit Board Design Category CAD Files
Developer Sunstone Circuits File format N/A
Description 123 file is a PCB123 Circuit Board Design developed by Sunstone Circuits.
Software programs that will open, edit or convert 123 files

Windows		 Sunstone Circuits PCB123



How to convert 123 files to another file format?

There are 7 records in our database eligible for 123 files to another file format conversion. If you want to achieve 123 to another files conversion, you may use the option.

123 to CSV 123 to DOC 123 to PDF 123 to WK1
123 to WK4 123 to XLS 123 to XLSX


How to convert another files to 123 file format?

There are 5 records in our database eligible for another files to 123 file format conversion. If you want to achieve another files to 123 conversion, you may use the option.

TMD to 123 WK1 to 123 WKS to 123 WKI to 123
PRN to 123


Can't open a 123 file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.123”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the 123 extension without any issue.


Where I can download the application that support 123 file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How 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.


Can I change the extension of 123 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/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a 123 file?

The reasons for the lack of the ability to open a 123 file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a 123 file. If there is still something wrong, you might want to check:

  • Whether the 123 file is damaged.
  • Whether the 123 file is incorrectly linked in the registry entries.
  • Whether the 123 file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the 123 file format is incompletely.
  • Whether the 123 file is infected.
  • Whether the drivers of the equipment used for opening a 123 file are up to date.
  • Whether your computer has enough hardware resources to open a 123 file.

If the 123 file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.