.CRT File Extension

File Type:
Security Certificate

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

What is a CRT file?

Crt file extension has Security Certificate file type, which is associated with the "web files" category.

All websites with the "https://" in the beginning use certificates that prove their authenticity. Certificate files have the .CRT extension and distributed by certificate authorities like Verisign and Thawte. Web browsers recognize certificate files automatically when you land on a secure website. If you need certificate information, you can click on the image with a lock near site’s name in the address bar.

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

crt file icon
File Type:
Security Certificate
Web Files

How to open CRT file?

Double click the crt 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 .crt 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 crt 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 crt 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 CRT files

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 crt file as well. Download Universal File Viewer for your OS.

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Download for Mac
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