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How to Open DAT . Files

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This wikiHow teaches you how to open DAT files on your Windows or Mac computer. You can proceed by opening the DAT file in the program that was used to create the file. If you don’t know which program was used, you need to determine this first before you can open the DAT file. Note: some DAT files (such as those used to store codecs for languages) cannot be opened with a regular program; These files are used by your computer’s operating system and should therefore not be edited.

Open a known DAT file on Windows

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Image titled Open a DAT File Step 1

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Identify the program that created the DAT file. Unlike most file types, the DAT format can be created by nearly any program; So you need to know the program that created the DAT file to determine what software you need to use to open it.

  • If you do not know what program was used to create the DAT file, determine before proceeding to open the file.
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Image titled Open a DAT File Step 2

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Open the program. Click or double-click the application icon of the program that was used to create the DAT file.
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Image titled Open a DAT File Step 3

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Click File . This menu is usually located in the upper left corner of the program window. A menu will appear.
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Image titled Open a DAT File Step 4

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Click Open… located in the File menu. Normally, a File Explorer window opens.

  • On Microsoft Office, you need to double-click This PC in the middle of the page after clicking Open to open the File Explorer window.
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Image titled Open a DAT File Step 5

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Show all files in File Explorer. Click the file type box to the right of the “Name” text field, and then select All Files from the drop-down menu. This is to allow File Explorer to display the entire file, including the DAT file.
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Image titled Open a DAT File Step 6

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Select the DAT file. Go to the folder where the DAT file is located and then click on the file to select it.
Image titled Open a DAT File Step 7

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Image titled Open a DAT File Step 7

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Click Open in the lower-right corner of the window. The DAT file will open in the appropriate program.
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Image titled Open a DAT File Step 8

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Confirm that you want to view the file when asked. In some cases, you will receive a message that the file contents do not match the extension (or similar). Then you need to click Yes or Open to open the DAT file.

  • For example, when opening a DAT file created by Excel on Excel, a message with possible file content will appear. Click Yes to continue opening the file.
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Image titled Open a DAT File Step 9

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Change the extension of the DAT file if necessary. If you don’t want to have to drag and drop files into the correct program every time you need to open them, you can change the extension. Note: you need to know the exact extension used for the DAT file, because simply changing to a slightly different extension (such as MP4 instead of AVI) will cause the file to become corrupted:

  • Right-click the DAT file and select Rename .
  • Select the dat part of the filename.
  • Replace dat with the file extension.

Open a known DAT file on Mac

Image titled Open a DAT File Step 10

Image titled Open a DAT File Step 10

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Identify the program that created the DAT file. Unlike most file types, the DAT format can be created by nearly any program; So you need to know the program that created the DAT file to determine what software you need to use to open it.

  • If you do not know what program was used to create the DAT file, determine before proceeding to open the file.
Image titled Open a DAT File Step 11

Image titled Open a DAT File Step 11

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Open the program. Click or double-click the application icon of the program that was used to create the DAT file.
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Image titled Open a DAT File Step 12

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Drag and drop the DAT file into the program window. Click and drag the DAT file into the program window.

  • Because Macs typically don’t treat DATs as readable files, you won’t be able to open them using the File > Open menu in the selected program.
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Image titled Open a DAT File Step 13

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Drop the DAT file. The DAT file will be opened in the program.
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Image titled Open a DAT File Step 14

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Confirm that you want to view the file when asked. In some cases, you will receive a message that the file contents do not match the extension (or similar). Then you need to click Yes or Open to open the DAT file.

  • For example, when opening a DAT file created by Excel on Excel, a message with possible file content will appear. Click Yes to continue opening the file.
Image titled Open a DAT File Step 15

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Image titled Open a DAT File Step 15

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Change the extension of the DAT file if necessary. If you don’t want to have to drag and drop files into the correct program every time you need to open them, you can change the extension. Note: you need to know the exact extension used for the DAT file because simply changing the extension slightly (such as MP4 instead of AVI) will cause the file to become corrupted:

  • Select the DAT file.
  • Click File and select Get Info in the drop-down menu.
  • Click the triangle next to the “Name & Extension” category.
  • Uncheck the “Hide extension” box if it has a check mark.
  • Replace dat in the current name with the file extension you want.
  • Press ⏎ Return and then click Use .extension when prompted (for example, with an XLSX document, you’ll need to click Use .xlsx here).

Find the right program for the unknown file

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Image titled Open a DAT File Step 16

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Review the contents of the file. You can determine the program to use to open the file based on the location and the name of the file.

  • For example, if the DAT file is located in the “Adobe” folder, we can guess that the Adobe application will open the file.
  • If the file is located in a folder containing other system data of the computer, it is best not to tweak it. It is possible that this DAT file is used by the computer’s system programs and features.
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Image titled Carrier Unlock an iPhone Step 4

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Ask the person who created the file. If you receive a DAT file attached to an email or downloaded from a website, try contacting the sender or uploading the file to the database and ask what program they used to create the file.

  • This may not work if you ask on a crowded forum or file-sharing site, but you may get an answer from a colleague or friend via email.
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Image titled Open a DAT File Step 18

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Open the DAT file with a text editor. You can use your computer’s built-in text editor to view some (but not all) of the contents of the DAT file:

  • Windows — Open Notepad, then drag and drop the DAT file into the Notepad window.
  • Mac — Open TextEdit from within your Mac’s “Applications” folder, then drag the DAT file and drop it into the TextEdit window.
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Image titled Open a DAT File Step 19

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Look up information about the DAT file. Depending on the DAT file, you may see a few lines of text indicating the type of software used to open the file.

  • Even if there is no line about the specific program to use, you can see a line representing the format (such as video or text) from the contents of the DAT file.
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Image titled Open a DAT File Step 20

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Try opening the DAT file with the master program. Some programs (such as VLC Media Player, iTunes, Preview and Notepad++) can be used to open a wide variety of file formats without changing the contents.

  • For example, VLC Media Player can open most video file formats, and you can also download and use Notepad++ on Windows to open nearly all text-based files.
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    Image titled Open a DAT File Step 21

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    Just try again and again. Unfortunately, if you cannot now determine the original program of the DAT file, we will have to try opening this file with various programs on the computer. You can do this by opening a program, dragging the DAT file into the program window and waiting for the file to open.

    • If the file opens in a recognizable format, you have identified the correct program.
    • If the program displays the DAT file as a bunch of unintelligible characters or refuses to open the file, this is not the right program.

    • Advice

    • DAT files that are located in system folders (such as some subfolder in the “Program Files” folder on a PC or inside the “~Library” folder on a Mac) are often automatically used by the program. created them, so you don’t have to (and shouldn’t) open these files.
    • BBEdit is a Mac-compatible alternative to Notepad++ that you can use to open everything from text documents to PHP files. This program is quite useful in determining the origin of DAT files.

    Warning

    • If the program that created the DAT file is not compatible with your computer, you need to open the DAT file on another computer.

    This wikiHow teaches you how to open DAT files on your Windows or Mac computer. You can proceed by opening the DAT file in the program that was used to create the file. If you don’t know which program was used, you need to determine this first before you can open the DAT file. Note: some DAT files (such as those used to store codecs for languages) cannot be opened with a regular program; These files are used by your computer’s operating system and should therefore not be edited.

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