HTML to RB Converter

Turn web pages into RocketBook RB eBooks — free online tool

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Offline Reading

Turn any web page into an RB eBook — your online content becomes a proper eBook for RocketBook devices.

Convert via Browser

No software to install. Paste a URL or upload HTML directly in your browser and get the RB output in seconds.

Secure Handling

Uploaded content is deleted right after processing. Converted RB eBooks are removed from servers within 24 hours.

How to convert HTML 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

HTML (HyperText Markup Language) is the standard markup language for creating web pages, originally conceived by Tim Berners-Lee at CERN in 1991 and later standardized by the W3C and WHATWG. HTML structures content using a system of nested tags that define headings, paragraphs, lists, links, images, tables, forms, and multimedia elements, with CSS handling visual presentation and JavaScript adding interactivity. The language has evolved through major versions — HTML 2.0 (1995), HTML 4.01 (1999), XHTML 1.0 (2000), and the current HTML Living Standard (evolved from HTML5, published 2014) — each expanding semantic vocabulary and capabilities. HTML documents are plain text files interpretable by any web browser, and the language's role extends beyond websites: email formatting, ebook content (EPUB), application interfaces (Electron, Cordova), and document export all rely on HTML. One advantage is universal rendering — every computing device with a browser displays HTML content, making it the most widely supported document format in existence. The semantic markup model provides another strength: elements like <article>, <nav>, <aside>, and <figure> carry meaning that benefits accessibility tools, search engine indexing, and content reuse. The open, W3C/WHATWG-governed specification ensures vendor independence, and HTML's text-based nature means documents are trivially created, inspected, and processed with any programming language.
Initial release: 1993
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 turn a web page into an RB eBook?

RB is the native format for RocketBook eReaders — converting web content lets you read articles and pages offline.

Can I just paste a URL to convert?

Absolutely — enter any public web address and Convertio will grab the page content and deliver it as an RB eBook.

What application reads RB eBooks?

RocketBook eReader software is the primary tool for RB. Some third-party eBook readers also support this format.

Is the text from the web page preserved?

Yes — all readable text and basic structure from the original page carry over into the resulting RB document.

Does the converter handle multiple pages?

You can upload several web pages and convert them in one session — batch processing is supported on Convertio.

Is this service free to use?

Yes, HTML to RB conversion is free on Convertio. Premium accounts provide higher limits and faster processing.

HTML to RB Quality Rating

4.2 (27 votes)
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