The PBM (Portable Bitmap) file format is part of the Netpbm pack, together with two other formats: PPM (Portable Pixelmap) and PGM (Portable Graymap). The three formats are sometimes referred to under the collective name PNM (Portable Anymap) and they represent intermediary files used in the conversion processes supported by Portable Bitmap Utilities — a collection of open source software. The PBM format is associated with monochrome bitmaps, while PGM contains gray-scale bitmaps and PPM color bitmaps.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple PBM files as once.
JPEG JPG PNG GIF TIFF TIF BMP ICO EMF WMF AI PDF EPS PS EPI WEBP WEBPLL JP2 PCX TGA DWG DWF DXF DGN WMZ CGM DRW SHP GBR PCT MIF PLT PCL SVG WPG CIN DCX DIS HRU MTV PRC RAD PIC RLA QRT SGI XBM XPM SWF CAL FAX FITS PSD PGM JXR BPG APNG DDS SVGZ CG4 FLIF AVIF