The 1st file extension is related to instruction text files distributed with some applications.

There is one other file type using
the 1ST file extension!

empty icon.1st - Visual FoxPro documenting wizard list

Detailed description

Software that works with 1st file extension

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1ST file - Readme first text file

What is 1st file? How to open 1st files?

File type specification:

Text file type icon Text file type

The 1st file extension is associated with the text files that are distributed with applications.

The 1st file stores information and instructions for app.

It is viewable in any text editing tool like Windows Notepad, Notepad++ etc.

The default software associated to 1st file type:

Microsoft Windows NotePad icon

Microsoft Corporation logoMicrosoft Windows NotePad  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Notepad is basic text editor distributed with Microsoft Windows operating system. It is used to view and edit simple text files as well as simple tool to create Web pages and source code editor.

Notepad has been included in all versions of Microsoft Windows since Windows 1.0 in 1985.

Help how to open:

Use text editor to view content *.1st files.

How to convert:

Currently there is no specific information available, about how to convert this file extension.

For general information try to look at:
Basic info how to convert text files

List of software applications associated to the .1st file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open 1st file, edit 1st file, convert 1st file, view 1st file, play 1st file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is ableto perform the specified software action, such as opening, editing or converting 1st files.

  • Open 1st file
  • Edit 1st file
  • View 1st file

Software that open 1st file - Readme first text file

Programs supporting the exension 1st on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open 1st file action.

Microsoft Windows:

Main software associated with 1st file by default:
Microsoft Windows NotePad small icon Microsoft Windows NotePad
Other suggested software:
NotePad++ text editor small icon NotePad++ text editor

Apple macOS / Mac OS X:


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