Free Online PBM to PGM Converter
PBM
to
PGM
PBM
Portable Bitmap
PBM is a Portable image in black and white. Can be opened with programs: Adobe Photoshop CS, ACD Systems Canvas 15, ACD Systems ACDSee 17, Newera Graphics Converter Pro, Corel PaintShop Pro X6. File contains 1 bit per pixel. PBM is a kind of file format PPM. And can be readable or binary.
PGM
Portable Graymap
PGM is a storage format for grayscale images. Files in this format can be opened using software: ACDSee Photo Manager 14, ACD Systems Canvas 15, Corel PaintShop Pro X4. This type of file can be edited with a text editor. PGM files can be in two versions: P2 / P5. P2 are readable, P5 - to binary formats.
How To Convert PBM to PGM

Step 1: Upload Files
Click the upload button or drag and drop your PBM files into the upload area.

Step 2: Convert File
Click "Convert" and wait for conversion done

Step 3: Download
Download the converted PGM file