Portable Bitmap Format

PBF (Portable Bitmap Format) was a prototype for the image format that became PNG. It was presumably never used for anything, but we document it because it appears in some lists of file formats, and to distinguish it from other formats with similar names. In particular, it should not be confused with PBM.

Identification
Some or all PBF files begin with the ASCII signature "".

Specifications

 * PBF Specification, Third Draft

Links

 * History of PNG