FB2 to RB Converter

Convert FB2 to Rocket eBook format — free online

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Vintage Reader Support

Keep your Rocket eBook device alive — convert FB2 ebooks into the RB format it was built to read.

Cloud Conversion

All FB2 to RB processing runs on Convertio servers. No local software, no command-line tools, just your browser.

Swift Processing

Conversions complete in seconds. Upload your FB2 file and have the RB output ready for download almost immediately.

How to convert FB2 to RB

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose rb or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your rb file right afterwards

About formats

FB2 (FictionBook) is an XML-based ebook format created by Dmitry Gribov in 2004, designed to provide a clean semantic description of a book's content independent of its visual presentation. Unlike page-layout formats, FB2 encodes structure — title, authors, chapters, annotations, genres, epigraphs, poems, footnotes, and binary attachments (typically cover images) — within a single well-formed XML document. This structural approach means reading applications have full control over rendering, allowing the same file to adapt perfectly to a small phone screen or a large e-ink reader. FB2 became enormously popular in Russia and Eastern Europe, serving as the dominant format on major Russian digital libraries and ebook distribution platforms. One significant advantage is metadata richness: the format's schema mandates detailed bibliographic information including author, translator, series position, publication date, and genre classification, making library management and discovery straightforward. The plain-text XML foundation is another strength — FB2 files are human-readable, easy to validate, and simple to transform using standard XML tools like XSLT. The format specification is freely available on GitHub, and a wide ecosystem of readers, editors, and converters supports it across all major platforms, from desktop applications like Calibre to dedicated e-readers with native FB2 rendering.
Developer: Dmitry Gribov
Initial release: 2004
RB is the native ebook format of the Rocket eBook, one of the first commercially available dedicated e-reading devices, developed by NuvoMedia and released in October 1998. Founded by Martin Eberhard and Marc Tarpenning — who later co-founded Tesla Motors — NuvoMedia designed the Rocket eBook as a handheld device with a reflective LCD screen, capable of storing approximately ten books in its internal memory. The RB format packages HTML-based content along with embedded images, metadata, and a table of contents into a single binary container optimized for the device's limited hardware. Content was purchased and downloaded through NuvoMedia's RocketLibrarian desktop software. A notable advantage of the format was its early support for bookmarking, annotation, dictionary lookups, and adjustable font sizing — features now standard on modern e-readers but revolutionary in the late 1990s. The Rocket eBook demonstrated viable commercial demand for dedicated reading devices, paving the way for subsequent platforms from Sony, Amazon, and others. NuvoMedia was acquired by Gemstar-TV Guide International in 2000, which discontinued the device line in 2003. While RB files are largely a historical curiosity today, they can be converted to modern formats using ebook management tools, and the format remains significant as a pioneering chapter in the evolution of digital reading.
Developer: NuvoMedia
Initial release: 1998

Frequently Asked Questions

Why convert FB2 to RB?

RB is the format for Rocket eBook, one of the earliest e-readers. Converting FB2 to RB serves collectors and users of vintage reading devices.

What devices read RB files?

The RB format was designed for the NuvoMedia Rocket eBook device. Desktop apps like Calibre can also display RB files.

Is the text quality preserved?

The textual content from your FB2 ebook transfers into the RB container. Complex formatting may simplify due to the older format spec.

Does this cost anything?

Not at all. FB2 to RB conversion on convertio.tools is completely free — no registration and no payment required.

How fast is the conversion?

Extremely fast. FB2 to RB processing typically completes in under a minute, even for full-length novels.

FB2 to RB Quality Rating

4.2 (17 votes)
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