System Requirements

This website contains links to software which is either no longer maintained or will be supported only until the end of 2019 (CKFinder 2). For the latest documentation about current CKSource projects, including software like CKEditor 4/CKEditor 5, CKFinder 3, Cloud Services, Letters, Accessibility Checker, please visit the new documentation website.

If you look for an information about very old versions of CKEditor, FCKeditor and CKFinder check also the CKEditor forum, which was closed in 2015. If not, please head to StackOverflow for support.


CKFinder is compatible with the following browsers, with their default settings:

  • Internet Explorer 5.5+
  • Firefox 1.5+
  • Safari 3+
  • Opera 9.5+

Note for Opera: By default Opera is configured to not allow scripts to receive right click events. The context menu will not work because of this. To correct it, just enable this option in the Opera settings: Tools (Menu) > Preferences... > Advanced (Tab) > Content (Left List) > JavaScript Options... > Allow script to receive right clicks (must be checked).


CKFinder for ASP is designed to run in IIS versions 5 and 6, with no need of any extra component for its basic functionality, except for image manipulation.

In order to create thumbnails or restrict image dimensions, one of the following options must be available:

  • ASP.NET 1.1 or 2.0. If the .Net Framework is available in the server and enabled in IIS, and both the ASP and ASP.NET runtimes have write access to the Windows temporary folder then it will be used automatically. This is the recommended solution.
  • AspJpeg component from Persits Software Inc. Not distributed with CKFinder.
  • ASPImage 2 component from ServerObjects. Not distributed with CKFinder.
  • ASPThumb component from BRIZ Software. Not distributed with CKFinder.
This page was last edited on 28 May 2010, at 07:46.