# Convert EPUB to PDB

> Convert EPUB to PDB online for free in seconds. Files are processed in a secure, isolated sandbox and deleted automatically. No sign-up, no watermarks.

URL: https://www.converterrr.com/epub-to-pdb

- Runs in an isolated cloud sandbox with Calibre: files are deleted automatically, and the job uses cloud credits.
- Engines: Calibre (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "pdb"` (paid plans).
- More: [eBook converter](https://www.converterrr.com/ebook-converter), [EPUB converter](https://www.converterrr.com/epub-converter), [Compress EPUB](https://www.converterrr.com/compress-epub).

## How to convert EPUB to PDB

1. **Add your EPUB files.** Drag and drop EPUB files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose PDB.** PDB is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4. **Download your PDB.** Download each PDB file, or everything at once as a ZIP.

## Good to know

- PDB reflows to any screen size, with chapters and table of contents kept where the source has them.
- EPUB files are typically used for e-books on almost every reader, while PDB is best for archived Palm e-books.
- This conversion runs on Calibre in an isolated cloud sandbox. Files are encrypted in transit and deleted automatically.

## EPUB vs PDB

|  | EPUB | PDB |
| --- | --- | --- |
| Full name | Electronic Publication | Palm eBook |
| Type | eBook | eBook |
| Extensions | .epub | .pdb |
| MIME type | application/epub+zip | application/vnd.palm |
| Best for | e-books on almost every reader | archived Palm e-books |
| Properties | open standard | legacy format |

**EPUB:** EPUB is the open standard e-book format with reflowable text, supported by Apple Books, Kobo, Google Play Books and Kindle (via Send to Kindle).

**PDB:** PDB is an e-book format from Palm devices (eReader and PalmDOC).

The other way around: [convert PDB to EPUB](https://www.converterrr.com/pdb-to-epub).

## Related conversions

- [PDB to EPUB](https://www.converterrr.com/pdb-to-epub) (cloud)
- [EPUB to PDF](https://www.converterrr.com/epub-to-pdf) (cloud)
- [PDF to PDB](https://www.converterrr.com/pdf-to-pdb) (cloud)
- [EPUB to DOCX](https://www.converterrr.com/epub-to-docx) (in the browser)
- [DOCX to PDB](https://www.converterrr.com/docx-to-pdb) (cloud)
- [EPUB to TXT](https://www.converterrr.com/epub-to-txt) (in the browser)
- [EPUB to MOBI](https://www.converterrr.com/epub-to-mobi) (cloud)
- [TXT to PDB](https://www.converterrr.com/txt-to-pdb) (cloud)
- [EPUB to HTML](https://www.converterrr.com/epub-to-html) (in the browser)
- [MOBI to PDB](https://www.converterrr.com/mobi-to-pdb) (cloud)
- [EPUB to Markdown](https://www.converterrr.com/epub-to-md) (in the browser)
- [HTML to PDB](https://www.converterrr.com/html-to-pdb) (cloud)

## Convert EPUB to other formats

[EPUB to PDF](https://www.converterrr.com/epub-to-pdf), [EPUB to DOCX](https://www.converterrr.com/epub-to-docx), [EPUB to TXT](https://www.converterrr.com/epub-to-txt), [EPUB to MOBI](https://www.converterrr.com/epub-to-mobi), [EPUB to HTML](https://www.converterrr.com/epub-to-html), [EPUB to Markdown](https://www.converterrr.com/epub-to-md), [EPUB to AZW3](https://www.converterrr.com/epub-to-azw3), [EPUB to ODT](https://www.converterrr.com/epub-to-odt), [EPUB to RTF](https://www.converterrr.com/epub-to-rtf), [EPUB to LaTeX](https://www.converterrr.com/epub-to-tex), [EPUB to IPYNB](https://www.converterrr.com/epub-to-ipynb), [EPUB to FB2](https://www.converterrr.com/epub-to-fb2), [EPUB to reST](https://www.converterrr.com/epub-to-rst), [EPUB to Typst](https://www.converterrr.com/epub-to-typ), [EPUB to AsciiDoc](https://www.converterrr.com/epub-to-adoc), [EPUB to Org](https://www.converterrr.com/epub-to-org), [EPUB to MediaWiki](https://www.converterrr.com/epub-to-wiki), [EPUB to OPML](https://www.converterrr.com/epub-to-opml), [EPUB to LIT](https://www.converterrr.com/epub-to-lit), [EPUB to DocBook](https://www.converterrr.com/epub-to-docbook), [EPUB to Textile](https://www.converterrr.com/epub-to-textile), [EPUB to JATS](https://www.converterrr.com/epub-to-jats), [EPUB to Man](https://www.converterrr.com/epub-to-man)

## Convert other formats to PDB

[PDF to PDB](https://www.converterrr.com/pdf-to-pdb), [DOCX to PDB](https://www.converterrr.com/docx-to-pdb), [TXT to PDB](https://www.converterrr.com/txt-to-pdb), [MOBI to PDB](https://www.converterrr.com/mobi-to-pdb), [HTML to PDB](https://www.converterrr.com/html-to-pdb), [Markdown to PDB](https://www.converterrr.com/md-to-pdb), [AZW3 to PDB](https://www.converterrr.com/azw3-to-pdb), [ODT to PDB](https://www.converterrr.com/odt-to-pdb), [RTF to PDB](https://www.converterrr.com/rtf-to-pdb), [FB2 to PDB](https://www.converterrr.com/fb2-to-pdb), [AZW to PDB](https://www.converterrr.com/azw-to-pdb), [LIT to PDB](https://www.converterrr.com/lit-to-pdb), [LRF to PDB](https://www.converterrr.com/lrf-to-pdb)

## EPUB to PDB: frequently asked questions

### How do I convert EPUB to PDB?

Drop your EPUB file onto the converter above, make sure PDB is selected, and click Convert. When it's done, download the PDB file — it usually takes a few seconds.

### Is it safe to convert EPUB to PDB here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

### Is the EPUB to PDB converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

### Will converting EPUB to PDB reduce quality?

No — PDB preserves the content of your EPUB file as faithfully as the format allows.

### Can I convert multiple EPUB files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert PDB back to EPUB?

Yes — use our PDB to EPUB converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.