RB to JP2 Converter

Convert Rocket eBook to JPEG 2000 — free, online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Archival Quality

Transform RB ebook pages into JP2 images with lossless compression — perfect for preserving old ebook content at full fidelity.

Privacy Guaranteed

Uploaded RB files are deleted right after processing. JP2 downloads are removed from servers within 24 hours.

Nothing to Install

Run the entire RB to JP2 conversion from your web browser. No software, no plugins — just upload and convert.

How to convert RB to JP2

1

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

2

Choose jp2 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your jp2 file right afterwards

About formats

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
JP2 (JPEG 2000 Part 1) is an image format based on the JPEG 2000 compression standard, developed by the Joint Photographic Experts Group and published as ISO/IEC 15444-1 in December 2000 as the successor to the original JPEG standard. Unlike JPEG's block-based discrete cosine transform, JPEG 2000 uses discrete wavelet transform (DWT) compression, which eliminates the characteristic 8x8 block artifacts visible in highly compressed JPEG images and instead produces a smooth, gradual quality degradation. The format supports both lossy and lossless compression within the same codestream, along with features absent from original JPEG: 16-bit and higher bit-depth images, arbitrary numbers of color channels, alpha transparency, region-of-interest coding (allocating more bits to important areas), and progressive quality or resolution refinement from a single compressed stream. One advantage is superior image quality at low bit rates — JPEG 2000 produces visibly cleaner images than JPEG at equivalent file sizes, particularly below 0.5 bits per pixel where JPEG exhibits severe blocking. The progressive decoding capability is another strength: a single JP2 file can be decoded at any resolution or quality level without encoding multiple versions, valuable for remote sensing and medical imaging where the same image must serve both thumbnail browsing and full-resolution analysis. JP2 is the mandated format for digital cinema (DCI), the preferred format in geospatial data (GeoJP2), and widely adopted in cultural heritage digitization.
Initial release: December 2000

Frequently Asked Questions

Why convert RB to JP2?

RB is an unreadable 1998 format. JP2 offers lossless or near-lossless image quality — ideal for archiving ebook page content.

What software opens JP2 files?

IrfanView, XnView, GIMP, Adobe Photoshop, and macOS Preview all handle JP2 files. Some web browsers support it too.

How does JP2 compare to regular JPEG?

JP2 supports lossless compression and produces fewer artifacts at similar file sizes. It is better for archival purposes.

Does the conversion run quickly?

Yes, RB to JP2 conversion typically completes in seconds. All processing occurs on remote servers, not on your device.

Is RB to JP2 free on Convertio?

Yes, the conversion is completely free. Upgraded plans offer larger file allowances and priority in the conversion queue.