Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your PDB images to PBM format. This tool works for both professionals and casual users. Convert your images to PBM in seconds.
Palm Database
The generic database container for Palm OS.
PDB (Palm Database) is the standard file format for all data on Palm OS devices, from address books to e-books. In the context of images, a PDB file acts as a container for 'Palm Pixmap' images, typically storing them as a series of records. It was the only way to get data onto a Palm pilot.
A PDB file consists of a header (name, attributes, creation time) and a list of records. For images, these records contain the bitmap data (often compressed with RLE/PackBits). ImageMagick treats PDB files as a multi-image sequence if multiple bitmaps are stored in the records. The format is strictly structured to map directly to the device's RAM storage model.
Created by Palm Computing in 1996. It was designed to facilitate 'HotSync' between the handheld's RAM and the desktop PC. It became ubiquitous in the early 2000s PDA era.
Portable Bitmap
The lowest common denominator of image formats.
PBM (Portable Bitmap) is the simplest format in the Netpbm suite, designed to represent monochrome (black and white) images. It uses a straightforward text-based (or simple binary) encoding where '1' represents black and '0' represents white (or vice versa depending on the viewer, though standard entails 1=black). It was designed to be easily emailed and processed by simple scripts.
There are two variants: P1 (ASCII) and P4 (Binary). ASCII P1: The file is human-readable text. A grid of 0s and 1s defines the image. Binary P4: The bits are packed into bytes for efficiency. The header simply states the magic number (P1 or P4) and the dimensions. There is no compression, no index, no palette.
Invented by Jef Poskanzer in the 1980s as a way to send bitmaps via email properly. It became the foundation of the 'pbmplus' (later 'netpbm') toolkit, which provided a standard way to convert between dozens of incompatible 80s file formats.
Experience lightning-fast image conversions with our advanced algorithms. No more waiting for your files to be uploaded before processing.
Enjoy unlimited image conversions without any hidden fees. Our service is completely free to use, with no limitations on file size or quantity.
Convert images files between over 20 formats. We support popular formats like PNG, JPG, WebP, HEIC and more.
Use Dynapik on any device with a modern browser. We support all major platforms such as Windows, macOS, Linux, Android, and iOS.
Ensure high fidelity in your conversions. Our professional-grade output is ideal for designers, marketers, and content creators.
Your files are safe with us. We focus on your privacy and security with advanced encryption and local processing.