PGX to PDB Converter

Online PGX to PDB converter — fast and free

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Format Flexibility

Beyond PDB, you can convert PGX to dozens of other image, document, and vector formats — all from the same simple interface.

Easy Download

Once the PGX to PDB conversion finishes, download your file with one click. Results are available for 24 hours after processing.

No Software Needed

Convert PGX to PDB directly in your browser — no app installs, plugins, or downloads. Just open the page and start converting.

How to convert PGX to PDB

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

Choose pdb or any other format you need as a result (more than 200 formats supported)

Let the file convert and you can download your pdb file right afterwards

About formats

PGX is a simple single-component raster image format defined as part of the JPEG 2000 standard (ISO/IEC 15444) for use in conformance testing and verification of JPEG 2000 codec implementations. Introduced around 2000 alongside the JPEG 2000 specification itself, PGX files store a single image component (one color channel or grayscale plane) with a text header followed by raw pixel data, providing an unambiguous reference representation against which encoder and decoder outputs can be compared sample by sample. The header is a single ASCII line specifying endianness (ML for big-endian, LM for little-endian), signedness (+ for unsigned, - for signed), bit depth (1 to 32 bits), width, and height. The pixel data follows as raw binary values, each occupying the minimum number of bytes needed for the specified bit depth, with one value per pixel. For multi-component images (like RGB), each component is stored in a separate PGX file. The format's deliberate simplicity — no compression, no metadata, no multi-channel support — ensures there are no ambiguities in interpretation that could mask codec bugs. One advantage is verification precision: PGX's uncompressed, exactly-specified representation allows bit-exact comparison of decoded JPEG 2000 output against reference images, essential for certifying that a codec implementation conforms to the standard. The format's role in the JPEG 2000 conformance testing framework means it is implemented by every serious JPEG 2000 codec (OpenJPEG, Kakadu, etc.) and used in the official ISO conformance test suite. PGX files can also be processed by ImageMagick and various JPEG 2000 development tools.

Developer: Joint Photographic Experts Group

Initial release: 2000

PDB (Palm Database) is a generic database container format created by Palm, Inc. for the Palm OS platform, first appearing with the original PalmPilot in March 1996. In the ebook context, PDB files most commonly use the PalmDOC or Plucker encoding to store readable text with basic formatting. The format consists of a 78-byte header identifying the database name, creation date, and record count, followed by a record index table and the data records themselves. PalmDOC-encoded PDB files use a simple LZ77-based compression scheme to pack plain text efficiently, while Plucker extends this with HTML rendering, image support, and hyperlink navigation. PDB ebooks powered a thriving mobile reading ecosystem years before dedicated e-readers existed — millions of Palm OS users carried entire libraries on devices like the Palm V, Tungsten, and Treo handhelds. A primary advantage is extreme simplicity: the flat record structure and minimal overhead mean PDB files parse instantly even on severely constrained hardware with limited memory and processing power. The open, well-documented structure is another strength, having spawned numerous reader applications across Palm OS, Windows, and later mobile platforms. Though the Palm platform is long discontinued, PDB ebooks remain accessible through conversion tools and readers like Calibre, and the format holds historical significance as one of the earliest practical mobile ebook solutions.

Developer: Palm, Inc.

Initial release: March 1996

Frequently Asked Questions

Why convert PGX to PDB?

Converting PGX to PDB lets you turn test reference images into practical everyday formats — PDB works in virtually any image viewer or web browser available today.

What programs open PDB files?

Open PDB files with any image editor or viewer — Photoshop, GIMP, Paint.NET, IrfanView, or the built-in viewer on your operating system.

Where do PGX files come from?

PGX files originate from JPEG 2000 conformance test suites. They serve as reference images for validating standard-compliant decoders and encoders.

Which platforms are supported?

Every platform with a modern browser works — Windows, macOS, Linux, ChromeOS, iOS, and Android all run the PGX to PDB converter perfectly.

How many files can I convert at a time?

You can upload and convert multiple PGX files to PDB in a single session. Each conversion processes in parallel for faster results.

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