CONVERT
PDB → FB2
Fast, secure PDB to FB2 conversion. No registration required.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB · Free plan · No signup required
Convert to:
Detecting available formats...
Uploading...
Processing your file...
PDB is an ebook format tuned for reflowable reading on e-readers and mobile devices. Reaching a FB2 from there is one hop. Our PDB to FB2 converter uses the same Calibre engine that powers the bulk of the ebook world. Authors use it, bookstores use it, pirates (unfortunately) use it — it is the de-facto standard for ebook format conversion and we just expose it over a simple browser upload. Worth knowing: PDB is an ebook format tuned for reflowable reading on e-readers and mobile devices. Meanwhile FB2 is FictionBook, a popular XML-based open ebook format in Russian-speaking markets.
PalmDOC eBook
Source formatPDB (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.
FictionBook
Target formatFictionBook (FB2) is an XML-based eBook format popular in Russia and Eastern Europe. It provides structured semantic markup for fiction and non-fiction books.
Why convert PDB to FB2
FB2 works on your specific reader where PDB does not. Ebook formats are tied to ecosystems — FB2 is Amazon-native, FB2 is IDPF-standard and opens everywhere, pick the one that matches your device and convert the rest.
HOW TO CONVERT
PDB → FB2
Upload the PDB
Drop the ebook file into the uploader. We detect the format and extract metadata automatically.
Convert through Calibre
Calibre parses the PDB structure, reflows content and writes a FB2 with the appropriate CSS profile for the target readers.
Download the FB2
Grab the converted ebook; both files auto-delete within two hours of the job finishing.
Common Use Cases
Kindle sideloading
Amazon devices and apps accept FB2 natively — convert your PDB library once for smooth sideload.
Kobo / e-ink readers
Third-party e-ink readers prefer FB2; PDB may open but without reflow or chapter navigation.
Library consolidation
Merge PDB and FB2 collections into a single FB2 library for cleaner search, tagging and sync.
Self-publishing pre-flight
Validate a manuscript across both PDB and FB2 targets before submitting to retailers.
Quality & Compatibility
Text content is preserved losslessly — every word of the PDB ends up in the FB2. Formatting richness depends on what the FB2 container supports; heavy typography that works in PDB may degrade gracefully in FB2, never lost entirely.
Tips for Best Results
- Set author and title metadata in Advanced before conversion; fixing it after sideloading to a reader is far more work.
- If chapter navigation feels off in the FB2, the source PDB probably had a weak ToC — Calibre respects what it finds, it cannot invent structure that was not there.
- For fixed-layout PDB (art books, technical manuals with diagrams) consider whether a reflowable FB2 actually makes sense before converting.
Frequently Asked Questions
Frequently Asked Questions
Yes. The free tier accepts files up to 100 MB without registration, email capture or watermarks. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Yes, provided the PDB itself has a well-formed ToC. Calibre reads the navigation structure and writes an equivalent ToC into the FB2. If the source lacks a ToC we can generate one from heading levels in Advanced → structure detection.
Uploads run over HTTPS, files are processed in isolated containers, and both the source PDB and the FB2 output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
No. KaijuConverter does not strip digital rights management. DRM-free PDB files — anything you authored yourself, public-domain classics, files from DRM-free retailers — convert without any restriction.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Yes. The cover is extracted from the PDB and re-embedded in the FB2 at device-appropriate dimensions. You can also override it in Advanced by uploading a custom cover image alongside the book file.
RELATED CONVERSIONS
Other popular pairs involving PDB or FB2
More from PDB
More ways to reach FB2
Secure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 2 hours. We never read, share, or store your data.