computers web2fb2net A Sample FB2, About FB2

A short book stored in the FB2 format, written so that a converter has something to convert. Free to use for any purpose.

 2026 en web2fb2.net scripts/build_sample_fb2.mjs 2026-10-23 web2fb2-sample-fb2-0001 1.0 <p>A Sample FB2, About FB2</p>

A file format is a promise about where things are.

Anonymous
<p>What you are holding</p>

This file is an FB2 book. Underneath it is one XML document: the description at the top, then a body of sections, and at the end any pictures, stored as text in base64.[1]

That is the whole format. There is no archive to unpack and no separate file for the cover, which is why an FB2 file is easy to make and hard to open on most readers, because most readers expect an ePub.

Converting it means moving each part to where an ePub keeps it: the metadata into the package document, each top-level section into its own chapter file, the notes into a file of footnotes, and the pictures back into real image files.

<p>The parts, side by side</p>
FB2ePub
descriptioncontent.opf
body sectionone XHTML file
body name="notes"footnotes
binaryan image file

Nothing is lost on the way. The converter keeps the text and its structure, the notes, the images, the cover and the metadata.[2]

<p>A short poem, so the converter has one</p>

FB2 has a poem element of its own, with stanzas and lines, and a converter that forgets it turns verse into prose. This one is here so that cannot happen unnoticed.

<p>Lines on a container</p> A book is a box with a label outside, and a list of its parts, and the parts. Change the label and the box is the same; change the list and the reader is lost. web2fb2.net

The sample ePub on this site says the same thing from the other direction.

From the ePub inspector page

That is the end of the sample. Open the converted file in the ePub inspector and you will see these two chapters, the notes file, the cover and one image.

<p>Notes</p>
<p>1</p>

The format was designed in Russia in 2004, which is why most of the books in it are Russian.

<p>2</p>

What it cannot keep is anything FB2 never carried in the first place: fonts, page layout, colours.

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