FB2 to XHTML Converter
Processing entirely on your device — large files may take a moment.
FB2 (FictionBook 2) is the e-book format of the Russian-speaking world and many indie e-reader apps: a single XML file with strict semantic markup — sections, titles, epigraphs, poems. Readers like FBReader and older PocketBooks prefer it. Convert XHTML to PDF or Markdown the same way as HTML — the converter reads the tags, not the doctype.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How FB2 compares to XHTML
| FB2 | XHTML | |
|---|---|---|
| Layout | Reflowable, semantic | Flowing, CSS-controlled |
| Editability | Any text editor (XML) | Plain-text editable |
| Structure | Strict FictionBook schema | Tag semantics |
| Best for | Russian-language & indie e-readers | Web pages and shareable documents |
How to convert FB2 to XHTML
- 1
Select your files
Drag & drop your FB2 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to XHTML". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted XHTML file individually, or grab everything at once as a ZIP archive.
About the FB2 format
FB2 (FictionBook 2) stores a whole book as one strictly-structured XML file: <section> for chapters, <title>, <epigraph>, <poem>, even <table>. That semantic rigour — not just styled text — is why FBReader, AlReader and older PocketBook devices favour it, and why conversions out of FB2 preserve the chapter tree cleanly.
Its weakness is reach: mainstream ecosystems (Kindle, Kobo, Apple Books, Google Play Books) do not accept it. Converting to EPUB moves the book into every modern reader; TXT/HTML covers plain reading, note-taking and long-term archiving.
+ Strengths
- ✓Strict semantic markup — chapters, poems, epigraphs
- ✓Single XML file, easy to validate and archive
- ✓Native to FBReader and many indie e-readers
! Limitations
- −Rejected by mainstream e-book ecosystems
- −Verbose XML makes files larger than EPUB
- −Metadata and cover support vary across apps
About the XHTML format
HTML is the markup language of the web itself. A document is plain text decorated with tags that describe structure — headings, paragraphs, lists, links, tables, images — and browsers turn that structure into a rendered, styled page. It is both a format and a program target: CSS styles it and JavaScript makes it interactive.
As a document format, HTML's strength is universality: any device with a browser displays it, text stays selectable and searchable, and links make it navigable. Its weakness is that rendering depends on the surrounding CSS and viewport, so it is a flowing document, not a fixed-layout one — printing or archiving an HTML page is inherently an approximation.
+ Strengths
- ✓Displays on every device with a browser
- ✓Semantic structure: headings, links, tables, media
- ✓Text remains selectable, searchable and accessible
! Limitations
- −Final look depends on CSS and viewport
- −Not a fixed-layout or print format
- −Untrusted HTML must be sanitized before display
Why convert FB2 to XHTML?
Converting makes sense where the strengths of XHTML meet what FB2 cannot give you. Displays on every device with a browser Meanwhile Rejected by mainstream e-book ecosystems One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this FB2 to XHTML converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for FB2 to XHTML?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Will chapters and the table of contents survive?
Chapter structure and internal links are carried over wherever XHTML has a place for them. The converter follows the book's own structure rather than flattening it into one stream.
Is it legal to convert my FB2 ebook?
Converting ebooks you legitimately own for personal use is generally fine. Removing DRM protection is a separate legal question that varies by country — this tool does not and will not break copy protection.