CDT to RB Converter

Turn CorelDRAW CDT templates into RB e-book format

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Simple Process

CDT to RB conversion is handled in the cloud — your CorelDRAW template becomes a ready-to-use RocketBook e-book without local processing.

Cloud Processing

Server-side conversion means no drain on your device. CDT files are processed quickly on Convertio infrastructure.

Quality Results

Your CDT template converts to RB seamlessly — Convertio bridges CorelDRAW content to accessible RocketBook e-book output.

How to convert CDT 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

CDT (CorelDRAW Template) is a template file format used by CorelDRAW, Corel Corporation's vector graphics editor available since January 1989. A CDT file is structurally identical to a standard CDR document — sharing the same RIFF-based container, vector object types, color definitions, and page layout capabilities — but is designated as a reusable starting point for new designs rather than a finished artwork file. When opened in CorelDRAW, a CDT creates a new untitled document pre-populated with the template's content, leaving the original template unchanged for repeated use. This workflow mirrors the template model found in office productivity suites, adapted for graphic design. CDT files commonly contain pre-built layouts for business cards, brochures, letterheads, certificates, posters, and other standardized print materials, complete with placeholder text, guide lines, bleed areas, and properly configured color spaces for print output. One advantage is workflow consistency — design teams can distribute branded templates ensuring every new document starts with correct dimensions, margins, fonts, and color palettes aligned to corporate identity standards. The format also saves significant setup time: rather than configuring document properties and recreating layout elements from scratch, designers begin with a production-ready foundation. Corel ships hundreds of CDT templates with CorelDRAW installations, and the format is supported across CorelDRAW versions with the same compatibility considerations as CDR.
Developer: Corel Corporation
Initial release: 1989
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 CDT to RB?

Turning CDT into RB lets you package CorelDRAW template content for digital distribution on e-readers and tablets.

How do I open a RB file?

RB (RocketBook) files open in Calibre and legacy RocketBook/NuvoMedia eBook readers.

Can I convert CDT to RB without paying?

Yes — the converter is free for standard use. Premium plans are available for professional or high-volume needs.

How fast is CDT to RB conversion?

Most files process in seconds. Cloud servers handle the work, so your local device speed is irrelevant.

Is the conversion process secure?

Your files stay private. CDT uploads are deleted after processing, and converted files are purged within 24 hours.

Can I use this converter on a phone?

Yes. Convertio runs in any mobile browser — upload your CDT file, convert, and download without installing an app.