PDB to JBG conversion is the process of transforming a Palm Database (PDB) file—often used to store eBooks, images or structured data on legacy Palm OS systems—into a JBG (Joint Bi-level Image Group) file, a compressed bi-level image format optimized for monochrome scanned documents. This conversion extracts the raster image content (or renders page images) from the PDB container and encodes them into the JBG bi-level compression scheme for compact, print-ready monochrome output.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
WebP has quietly become the default image format of the modern web, delivering 25-35% smaller files than JPG and PNG with universal browser support. This 2026 guide covers current adoption stats, browser compatibility, WordPress integration, conversion workflows, and when to choose WebP over AVIF for optimal Core Web Vitals performance.
Read guide →Not sure whether to save your image as PNG or JPG? This detailed comparison covers compression, transparency, file size, web performance, and real-world use cases so you can pick the right format every time — with conversion links when you need to switch.
Read guide →Learn how to convert HEIC to JPG for maximum compatibility. This guide explains what HEIC is, why iPhones use it, the key differences between HEIC and JPG, and walks through every conversion method including online tools, iPhone settings, Windows, and Mac.
Read guide →Drag your .PDB file from your computer or use the browse function.
Confirm .jbg as the selected destination format.
Click "Convert" and download your converted .JBG file once ready.
The PDB file format typically uses MIME type application/x-palm-database and is commonly found in document and database applications. JBG files use the image/jbg MIME type and are primarily used for bi-level image compression, often in fax and document imaging systems. The JBG format employs JBIG compression codecs for efficient image encoding.
The JBG (.JBG) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like PDB.
While specific technical details aren't available here, JBG files generally serve the purpose of storing image effectively within their domain.
Easily convert your PDB files to the JBG format using our online converter. Designed for quick and secure file transformation, our tool supports seamless conversion without the need for software installation. Whether you are handling documents or images, converting PDB to JBG is now hassle-free and accessible from any device.
PDB files are primarily used for storing document or database information with a focus on content structure, whereas JBG is a compressed image format optimized for binary images. While PDB supports complex document data, JBG offers superior compression and faster rendering for scanned images. Choosing JBG is ideal for efficient storage and quick image access.
Keep individual PDB-derived page images under 10–20 MB (uncompressed) to avoid long processing times and memory spikes; target final JBG pages under 2–5 MB for efficient storage.
Preserve quality by using adaptive binarization plus despeckle when converting scanned grayscale images to bi-level JBG; avoid aggressive thresholding that removes faint text.
For large libraries, convert in batches (10–50 files) and use intermediate TIFF with lossless compression to verify results before producing final JBG files.
Note format limitations: JBG is bi-level (black-and-white) only—photographs and continuous-tone color/grayscale will lose gray detail when converted from PDB unless preprocessed to high-contrast monochrome.
This converter made switching from PDB to JBG incredibly simple and fast.
Emma R.
Graphic Designer
Reliable and easy to use for all my document conversions.
Liam M.
IT Specialist
The best online tool I found for PDB to JBG conversion without any hassle.
Olivia S.
Project Manager
Start your free PDB to JBG conversion now.
Drag your file here to to upload.
Up to 250MB
If pages in the PDB are compressed or embedded in unusual encodings, extract and normalize images first (e.g., to TIFF/PNG) to ensure reliable JBG encoding.