.1ST File Extension

File Type:
Readme File

Having trouble opening .1st extension? Don't panic! This page explains what 1st files are as well as suggests programs you may use to open 1st files. You can download these programs through this page.

What is a 1ST file?

1st file extension has Readme file type, which is associated with the "text files" category.

Readme text file provides essential information for working with the software. The “1ST” file extension notifies that the readme file should be opened prior to launching the program for the first time. Comparing to the .readme.txt file, 1ST file is not as commonly used.

To learn how you can open the given file, read the information below.

1st file icon
File Type:
Readme File
Text Files

How to open 1ST file?

Double click the 1st file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .1st extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the 1st extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the 1st file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open 1ST files

  • Windows Windows
    • Microsoft Notepad Microsoft Notepad
    • Other text editor Other text editor

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the 1st file as well. Download Universal File Viewer for your OS.

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