The File Extensions Database


.U00 File Extension

  • Category: Emulator Files

What is an .U00 file?

.U00 is Commodore C64 universal data

The u00 file extension is related to the Commodore C64, an 8-bit home computer with KERNAL / Commodore BASIC operating system.

The u00 file stores data in C64 universal format.

Universal Commodore file is designed to work on any Commodore C64 emulator or Commodore C64/C128 too.

This u00 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.


How to open:

Use compatible emulator to work with *.u00 files.

How to convert:

As far as we know, this .u00 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

How to solve problems with U00 files

  • Associate the U00 file extension with the correct application. On :
    Windows: Right click on any U00 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.U00 files". Mac: Right click (or Ctrl-click) the U00 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .U00 is Commodore C64 universal data. Because only the current version supports the latest U00 file format. Search, therefore, e.g. on the manufacturer website after an available .U00 is Commodore C64 universal data update.
  • To make sure that your U00 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.