The File Extensions Database

.IDX255 File Extension

  • Developer by: Jagex
  • Category: Game Files

What is an .IDX255 file?

.IDX255 is Runescape Cache File

Cache file saved by Runescape, an online multiplayer game; stores game progress on a player's local machine; used when resuming a game online; typically named "main_file_cache.idx255" and is saved with several other cache files.

Programs that open Runescape Cache File
Jagex Runescape

How to solve problems with IDX255 files

  • Associate the IDX255 file extension with the correct application. On :
    Windows: Right click on any IDX255 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.IDX255 files". Mac: Right click (or Ctrl-click) the IDX255 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 .IDX255 is Runescape Cache File. Because only the current version supports the latest IDX255 file format. Search, therefore, e.g. on the Jagex manufacturer website after an available .IDX255 is Runescape Cache File update.
  • To make sure that your IDX255 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.