.WWF File Extension

Document created by SAVE AS WWF, a program used to create .PDF documents that cannot be printed; may contain the contents of any electronically printable document; used for distributing "green-friendly" documents; created using the print dialog option "SAVE AS WWF."

The World Wide Fund for Nature (WWF) created the WWF file format to stop unnecessary printing and to increase awareness about the use of paper. The organization has used slogans such as "Think Before You Print" and "Save as WWF, Save a Tree."

SAVE AS WWF can be used to create and open WWF files. The program was initially developed for Mac OS X, but it is now available for Windows as well. WWF files can also be viewed with some Windows and Linux PDF document readers, including Adobe Reader. Apple Preview can open WWF files if you first rename the extension to ".pdf."

NOTE: WWF files prevent user printing by locking document print permissions with a password.