PDB to MOBI Converter

PDB to MOBI converter — digital book creation online

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Secure Conversion

File privacy is guaranteed — PDB uploads are removed after conversion, and MOBI results are deleted within 24 hours.

Cloud Processing

The heavy lifting happens on our servers. Your device does not process anything — just upload PDB and download MOBI.

Easy to Use

No expertise needed — the PDB to MOBI converter walks you through upload, format selection, and download step by step.

How to convert PDB to MOBI

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

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

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

About formats

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

MOBI is an ebook format originally developed by Mobipocket SA, a French company founded in 2000 that was later acquired by Amazon in 2005. The format builds on the PalmDOC/PDB container structure, adding support for HTML-based content markup, embedded images, a DRM layer, and a JavaScript subset for limited interactivity. MOBI files use a record-based database architecture inherited from Palm OS, with a header structure containing metadata like title, author, publisher, and language followed by compressed HTML content records. The format became the foundation of Amazon's early Kindle ecosystem — the original AZW format used on first-generation Kindles was essentially MOBI with Amazon's own DRM wrapper. MOBI supports reflowable text with basic formatting including bold, italic, headings, lists, and tables, as well as internal hyperlinks and a built-in table of contents. One advantage is broad device compatibility: MOBI files are recognized by Kindle devices and apps spanning over a decade of hardware, as well as numerous third-party readers on desktop and mobile platforms. The format's lightweight structure is another strength — even long novels produce compact files that load quickly on modest hardware. While Amazon has since moved to the more capable AZW3/KF8 format for new publishing, MOBI remains widely circulated in existing ebook libraries and continues to be produced by conversion tools like Calibre for maximum Kindle compatibility.

Developer: Mobipocket SA

Initial release: 2000

Frequently Asked Questions

Why convert PDB to MOBI?

PDB is tied to the defunct Palm ecosystem. Moving to MOBI gives you mobile ebook format that works on today's e-readers.

What apps read MOBI files?

You can open MOBI files with Kindle devices and apps, Calibre, FBReader. Most platforms have at least one compatible option available.

Can I read the MOBI file on my e-reader?

The MOBI format is compatible with popular e-readers. Load the file onto your device or use a reading application.

Does the conversion preserve page layout?

The converter does its best to maintain visual structure. Complex layouts may be simplified to fit the MOBI reading format.

Is batch conversion to MOBI available?

Batch conversion is supported. Queue multiple PDB files and get separate MOBI ebook outputs for each one.

Related Conversions

PDB to PDF

PDB to EPUB

PDB to MOBI

PDB to DOC

PDB to JPG

PDB to SVG

PDB to DOCX

PDB to TXT

PDB to FB2

PDB to GIF

PDB to XLS

PDB to PNG

PDB to RTF

PDB to CSV

PDB to XLSX

PDB to JPEG

PDB to DXF

PDB to PPT

PDB to PPTX

PDB to ODT

PDB to HTML

PDB to AI

PDB to PS

PDB to TIFF

PDB to PLT

PDB to AZW3

PDB to WBMP

PDB to BMP

PDB to WEBP

PDB to DDS

PDB to SNB

PDB to DOCM

PDB to PSD

PDB to JP2

PDB to LRF

PDB to PBM

PDB to RB

PDB to TCR

PDB to TGA

PDB to PCX

PDB to ICO

PDB to CUR

PDB to PGM

PDB to PPM

PDB to EXR

PDB to FAX

PDB to FTS

PDB to G3

PDB to HDR

PDB to HRZ

PDB to IPL

PDB to MAP

PDB to MNG

PDB to MTV

PDB to OTB

PDB to PAL

PDB to PALM

PDB to PAM

PDB to PCD

PDB to PCT

Specific converters

EPUB to MOBI

PDF to MOBI

TXT to MOBI

DOCX to MOBI

FB2 to MOBI

AZW3 to MOBI

DOC to MOBI

DJVU to MOBI

RTF to MOBI

JPG to MOBI

HTML to MOBI

PNG to MOBI

ODT to MOBI

PPTX to MOBI

JPEG to MOBI

PPT to MOBI

XLSX to MOBI

PDB to MOBI

WEBP to MOBI

LRF to MOBI

XLS to MOBI

PPSX to MOBI

XPS to MOBI

SK to MOBI

GIF to MOBI

EPS to MOBI

WPS to MOBI

DOCM to MOBI

ABW to MOBI

DBK to MOBI

PDB to MOBI Quality Rating

4.5 (64 votes)

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