If you don’t know the extension of a file, it doesn’t mean that it exists. You can locate it easily using Windows File Explorer or other methods described in:

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Section 1..

Files without an extension can be identified by following the steps in

Section 2..

Once you know the file’s extension, you can find a program that will open it using the instructions in

Section 3.

This article will help you solve all your file extension problems. Hope you enjoy reading!

Table of Contents

  • Section 1 – How to Check if the File has an Extension or Not
  • Method 1: Through details View in File Explorer
  • Method 2: Through File properties
  • Method 3: Enable File Extension
  • Part 2 – How to Determine the Extension of a File That Doesn’t Have an Extension
  • Method 1: Use the Toolsley Tool
  • Method 2: Through the DROID Tool
  • Method 3: Through HEX editors
  • Section 3 – How to Find the Right Software to Open the File if You Know the Extension

Section 1. How to Check if the File has an Extension or Not

When opening a file without an extension, the first thing to do is to ensure that it isn’t an extension file. This article will show you how to check if the file has a valid extension. These three methods all use File Explorer and are very simple.

Method 1: Through Details View in File Explorer

Method 1 Start by going to where your file is located. Click directly on the empty space and click on the View option. Next, select the Details option.

Second step Step 2 – Now examine the type column of your file. If the Type column column states File the file isn’t an extension, check that it is.

Method 2 – Through File Properties

You can also verify the type of the file by looking at its properties

1. Step 2: Right-click on the file and select the Properties option.

Second step: Step 2: In the properties window select the General tab. You can now verify that the file has the correct extension by seeing the type of file.

Method 3: By Enabling File Extension

If the extensions are available, this option allows you to see the extension names for each file in a folder. It is a sign that the extension has not been added to the file.

Step 1. Use Windows File Explorer to locate the file.

Next, click on the view tab at the top ribbon. You will see the drop-down menu. Select “Show” then choose Extensions for File names.

Step 2. Step 2 – You can now see all the extensions for the folder. You won’t see a file if it doesn’t have the extension you need.

The screenshot below shows that extensions are all files marked in green. The file in red is not an extension.

You may not be aware of the extension of your file. Section 2 will help you determine the correct extension.

If the extension is not a problem, you can skip to Section 3 to locate a program that will open the file.

2: How to Determine the Extension of a File That Doesn’t have an Extension

You can find the extension of the file by using the methods in Section 1. There are other ways to find it.

Method 1: Through Toolsley Tool

Toolsley Toolsley is an online program which will show you the extension of your file after you upload it.

Step 1. Go to the Toolsley website.

Hit the Choose an image button.

Step 2 : Select the file that you want to find the extension from and click the Open File button.

Step 3. Step 3 – The Toolsley tool will give you an extension for the file. This is illustrated below.

Method 2 – Through DROID tool

DROID is a program that you can download to your computer. This tool is provided by the UK government and is therefore more secure. This program also has the advantage of allowing you to search multiple extensions in one click.

First, download the open source software from the UK government’s National Archives Website. Download DROID: Identification of File Formats Toolunder the section Current Version.

Once you have downloaded the zip file, right-click on it and choose to extract all.

Step 2. Step 2 – Once you are in the folder you have extracted, double click to open the folder “droid.bat”.

Step 3. Step 3.

When the Select Resources window opens, click on the appropriate file or extensions to be selected. Then, hit the OK button.

Step 4. Once all files are selected, click the Start button as shown in the image below.

Phase 5: After the process is complete, you will be able view the extension(s), in the column called format.

Method 3: Through HEX Editors

You don’t have to upload the file or download another program to identify the extension, you can use any hex editor to determine the extension.

You can download the Hex Editor Neo if you don’t already have one installed. It’s the same process for all editors, except with hex.

Step 1. Step 1 – Once the hex editor has opened, load the file onto the editor.

The Hex Editor Neo can be used by clicking on the File tab. Next, click on the open button. Browse for the file that you want to find the extension.

Step 2. Once the file has been opened, you’ll see the extension on your left side.

Note: If the extension is not located at the start of the file (as in the image below), scroll down and type the extension.

After you have identified the extension you can visit Section 3 and find the right application to open the file.

Section 3. How to get the right software to open the file if you know the extension

This section assumes that you know the file’s extension. However, you must also know the program to open it.

Start by going to FileInfo.com. FileInfo.com website.

Click the Search icon and enter the extension name in the Search bar.

I am trying to find the programs that can access an extension XML in the following example.

Step 2: Scroll down to the section “Programmes that allow opening XML files” and you will see all of the programs that can open XML extensions.

Download one of these programs to open the file.

In a similar way to how you found the right program to open an xml file, there are applications that can open any extension.

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