OTF to PDB Converter

Convert OpenType fonts to Palm Database image format online for free

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Legacy Format Bridge

Bridge the gap between modern OTF typography and the Palm Database format — useful for archival projects and legacy device compatibility.

Cloud Powered

All conversion happens remotely on our servers. No local tools needed and your computer stays responsive during the entire process.

Batch Processing

Convert multiple OTF fonts to PDB in one session. Upload your collection, convert, and download all results without repeating the process.

How to convert OTF 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

OTF (OpenType Font) is a scalable font format jointly developed by Microsoft and Adobe, announced in 1996 and later standardized as ISO/IEC 14496-22. OpenType unifies TrueType and PostScript font technologies under a single container — OTF files with PostScript outlines use CFF/CFF2 tables for cubic Bezier curves, while those with TrueType outlines use quadratic splines in glyf tables (these typically carry the .ttf extension despite being OpenType). The format supports up to 65,535 glyphs per font, enabling comprehensive coverage of Unicode's vast character repertoire including Latin, Cyrillic, Arabic, CJK, and mathematical symbols within one file. Advanced typographic features are encoded in GSUB (glyph substitution) and GPOS (glyph positioning) tables, powering contextual alternates, ligatures, small caps, stylistic sets, and complex script shaping. A defining advantage is cross-platform consistency — the same OTF file renders identically on Windows, macOS, Linux, iOS, and Android without platform-specific builds. The rich OpenType Layout feature system is another major strength, giving designers fine-grained typographic control that was previously impossible in a single font file. OpenType 1.8 introduced variable font technology, allowing continuous interpolation across weight, width, slant, and custom design axes within a single compact file. Universal support in web browsers, design applications, office suites, and operating systems makes OTF the dominant professional font format in modern digital typography.

Developer: Microsoft and Adobe

Initial release: 1996

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 OTF to PDB?

PDB is used for Palm OS devices and certain e-reader workflows. Converting OTF to PDB lets you create image data compatible with these legacy platforms.

How do I open a PDB file?

PDB files open in Palm OS device emulators, dedicated PDB viewers, and some image tools that recognize the Palm Database bitmap format.

What happens to the font data?

The font glyphs are rendered as bitmap image data within the PDB format. Vector outline information is rasterized during conversion.

Can I convert several fonts at once?

Yes — upload multiple OTF files and Convertio will process each one individually, generating separate PDB outputs for every font.

Is OTF to PDB conversion free?

Completely free. Convertio runs the conversion in the cloud from your browser with no registration or software downloads required.

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OTF to PDB Quality Rating

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