The source code, as well as binary versions for MS-DOS/Windows and Macintosh, documentation, examples, and other files are available here. If you have a username and password for FEFF on the World Wide Web, click the appropriate link below.
Download the free FEFF6-lite, limited to EXAFS analysis
To obtain earlier versions of FEFF, please contact the FEFF administrator.
Please note that the passwords for downloading FEFF7, FEFF8 and FEFF9 are not the same. If you wish to upgrade to a newer version, you need to purchase an upgrade. Upgrades and new licenses may be purchased on our ordering page.
The source code and binaries of the FEFF Project codes are protected by an HTTP user authentication barrier. Licensed users of the software are granted a username and password that allow them beyond the user authentication barrier. Please note that all files download from the restricted archive are logged.