DAT_OLD file: How can I open a .DAT_OLD file?
The table below provides useful information about the .dat_old file extension. It answers questions such as:
- What is the .dat_old file?
- What program do I need to open a .dat_old file?
- How can the .dat_old file be opened, edited or printed?
- How can I convert .dat_old files to another format?
We hope you find this page helpful and a valuable resource.
✅ Minecraft Old Level Data Backup

The DAT_OLD file is a Minecraft Old Level Data Backup. Minecraft is a sandbox indie game originally created by Swedish programmer Markus Notch Persson and later developed and published by Mojang. The level.dat_mcr is a backup of the level.dat file before conversion from the Alpha Level Format to MCRegion or Anvil.
⚠ Be careful with .dat_old files.
It's important to know that the .dat_old file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .dat_old files. Be cautious when dealing with .dat_old files from unknown sources.
🔴 Can't open a .dat_old file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Select an app to open this .dat_old file
It means that the operating system does not have a default app associated with the .dat_old file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .dat_old file. A context menu will appear.
- From the context menu, select Open with. Windows will display a list of recommended apps.
- If the desired app is listed, select it from the provided options.
- If you cannot find the appropriate app, you may need to install software that supports the specific file type.
If you don't know how to change the default app for the .dat_old file, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.
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