Question 1

What does this tool do?

Accepted Answer

It parses Mobipocket .prc files by reading the PalmDB header (78 bytes), walking the record info table, decoding PalmDOC RLE compression (method 1) or uncompressed text (method 0), detecting chapters via

/

/mbp:pagebreak tags, and generating a valid EPUB 3 archive with both NCX (EPUB 2) and NAV (EPUB 3) tables of contents. The result opens in Apple Books, Calibre, Kobo, Nook, and most e-readers.

Question 2

What is the difference between PRC and MOBI?

Accepted Answer

PRC and MOBI are nearly identical — both use the PalmDB container with a PalmDOC + MOBI header. The file extension .prc was used for PalmDOC books (creator 'TEXt') while .mobi was used for Mobipocket books (creator 'MOBI'). This tool accepts both creator codes. HuffCDic compression (method 2) is not supported.

Question 3

Does it support DRM-protected PRC files?

Accepted Answer

No. DRM-protected PRC files are encrypted and cannot be decoded without the original Mobipocket Reader software. This tool only works with DRM-free PRC files. If your file is DRM-protected, you would need to remove the DRM first using a tool you legally own access to.

Question 4

What extra features does this tool have compared to others?

Accepted Answer

10 extras: (1) Drag-drop input. (2) Custom title and author metadata. (3) Auto-detected encoding (CP1252 / UTF-8). (4) Stats — records, text records, words, characters. (5) Live preview of the first chapter's XHTML. (6) Custom CSS injection into the EPUB stylesheet. (7) Configurable base font size (10–36pt). (8) Conversion history in localStorage (last 10). (9) Shareable URL with conversion options. (10) Both NCX (EPUB 2) and NAV (EPUB 3) tables of contents for maximum reader compatibility.

Question 5

Is my PRC file uploaded anywhere?

Accepted Answer

No. All PRC parsing, record extraction, PalmDOC decompression, EPUB XML generation, and ZIP packaging happens in your browser. File contents never leave your device.

Question 6

Will the EPUB preserve images from the PRC?

Accepted Answer

No. We currently extract text only. PRC image records are not extracted and embedded in the EPUB. This keeps the converter pure-JS and lightweight. For image extraction, use a desktop tool like Calibre.

PRC to EPUB Converter

How to use