FB2 vs PDB
Una comparativa detallada de FictionBook y PalmDOC eBook — tamaño de archivo, calidad, compatibilidad y cuál elegir según tu flujo de trabajo.
FictionBook
eBooksFictionBook (FB2) is an XML-based eBook format popular in Russia and Eastern Europe. It provides structured semantic markup for fiction and non-fiction books.
Sobre los archivos FB2PalmDOC eBook
eBooksPDB (Palm Database) is a generic database format from the Palm OS era that was widely used for ebooks on Palm handheld devices. PalmDOC and Mobipocket both use PDB as their underlying container for storing text-based ebook content.
Sobre los archivos PDBComparativa de ventajas
FB2 Ventajas
- Pure XML — trivial to parse, search, and transform.
- Single-file ebooks with inline images.
- Excellent on low-powered e-readers.
- De-facto standard in Russian-language ebook ecosystem.
- Simple structure makes conversion to any other format straightforward.
PDB Ventajas
- Compact record-based structure for low-RAM devices.
- Basis of PalmDOC, Mobipocket, eReader, and Kindle AZW formats.
- Well-documented.
- Simple to parse — stable for 30 years.
Limitaciones
FB2 Limitaciones
- No styling, no custom fonts, no fixed layouts.
- Minimal Western-language tooling.
- Kindle and Apple Books do not support FB2 natively.
- Non-fiction with complex typography (textbooks, cookbooks) is a poor fit.
PDB Limitaciones
- Ecosystem collapsed with Palm's hardware business.
- Name collides with biochemistry's Protein Data Bank PDB.
- Modern ebook tooling prefers EPUB, AZW3, or direct formats.
- Very little new content written as PDB in 2026.
Especificaciones técnicas
| Especificación | FB2 | PDB |
|---|---|---|
| MIME type | application/x-fictionbook+xml | — |
| Extensions | .fb2, .fb2.zip | — |
| Container | Single XML file (optionally zipped) | — |
| Standard | FictionBook community spec (maintained on GitHub) | — |
| Encoding | UTF-8 (required) | — |
| MIME types | — | application/vnd.palm (Palm), chemical/x-pdb (biochemistry) |
| Extension | — | .pdb |
| Palm structure | — | Header + record list + record data |
| Related formats | — | PalmDOC, Mobipocket MOBI, AZW |
| Namespace clash | — | Biochemistry Protein Data Bank is a different format entirely |
Tamaños típicos de archivo
FB2
- Novel (text only) 200-800 KB
- Novel with cover image 300 KB - 1.5 MB
- Illustrated children's book 5-30 MB
PDB
- PalmDOC ebook (text novel) 200 KB - 2 MB
- PalmOS app data store 10 KB - 500 KB
- Protein Data Bank file (biochemistry) 50 KB - 5 MB
¿Listo para convertir?
Convierte entre FB2 y PDB online, gratis y sin instalar nada. Subida cifrada, eliminación automática a los 60 minutos.
Preguntas frecuentes
FB2 (FictionBook) is an ebook format designed for reading long-form text on dedicated e-readers, tablets, and ebook apps. It is part of the ebooks family and typically supports reflowable text, embedded images, chapter navigation, cover art, and metadata (title, author, ISBN) in a portable package.
FB2 (FictionBook) is an ebook formato designed para reading long-form text on dedicated e-readers, tablets, e ebook apps. It is part of the ebooks family e tipicamente suporta reflowable text, embedded images, chapter navigation, cover art, e metadata (title, author, ISBN) em um portable package.
Dedicated e-readers — Kindle, Kobo, Nook, Pocketbook — support the most common ebook formats. On phones, Apple Books, Google Play Books, Moon+ Reader and KOReader all handle FB2. For desktop reading, Calibre is the universal ebook viewer and library manager. Convert to EPUB or PDF for maximum compatibility.
Dedicated e-readers — Kindle, Kobo, Nook, Pocketbook — support the most common ebook formatoos. On phones, Apple Books, Google reproduzir Books, Moon+ Reader e KOReader all handle FB2. para desktop reading, Calibre is the universal ebook viewer e library manager. converter to EPUB ou PDF para máximo compatibilidade.
Upload your FB2 to KaijuConverter and pick EPUB, MOBI, PDF, AZW3, or similar targets. Our Calibre-powered pipeline preserves chapter structure, embedded images, cover art, and metadata. Conversion takes seconds for typical novels; long technical books with many images may take a little longer.
EPUB is the open ebook standard — it plays on every e-reader except older Kindles and in every major ebook app. PDF is better for fixed-layout content (textbooks, coffee-table books) and printing. Pick EPUB when the ebook is reflowable text, PDF when the layout matters more than the reading experience.