Welcome to the HDF4 home page!

The latest Official Release of HDF is 4.2.13

HDF4 (also known as HDF) is a library and multi-object file format for storing and managing data between machines. There are two versions of HDF technologies that are completely different: HDF4 and HDF5. HDF4 is the first HDF format.

Although HDF4 is still funded, new products should be developed in HDF5 . See this FAQ  for details.

Release Documentation

User's Guide

Reference Manual

Specification and Developer's Guide

 

 

Other Information