EMF to RB Converter

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Quick Results

Get your RB file fast — Convertio processes EMF conversions on high-performance servers for near-instant delivery.

Cross-Platform

Convert EMF to RB on Windows, macOS, Linux, iOS, or Android — Convertio works in any browser on any operating system.

Reliable Conversion

Convertio converts EMF to RB with consistent results. The process is optimized to retain quality and visual accuracy.

How to convert EMF 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

EMF (Enhanced Metafile) is a vector graphics format developed by Microsoft as the successor to WMF (Windows Metafile), introduced with Windows NT 3.1 in July 1993. EMF records a sequence of GDI (Graphics Device Interface) function calls that describe vector shapes, text, embedded bitmaps, and rendering attributes in a device-independent manner. Unlike WMF's 16-bit coordinate system limited to 65,536 units, EMF uses 32-bit coordinates and adds support for Bezier curves, advanced path operations, world coordinate transforms, gradient fills, and extended text capabilities including Unicode. The format functions as a graphics recording mechanism — applications capture their drawing operations into an EMF file, which can then be replayed at any scale on any device with full geometric precision. One advantage is native Windows integration: EMF is the standard clipboard and spooler format for vector content across the Windows ecosystem, enabling lossless copy-paste of graphics between Office documents, design tools, and presentation software without rasterization. Resolution independence is another key strength — EMF graphics scale smoothly from screen display to high-resolution print output. An extended variant, EMF+, introduced with GDI+ adds anti-aliasing, alpha transparency, and advanced brush types. EMF remains deeply embedded in Windows-based publishing, technical documentation, and enterprise document workflows.
Developer: Microsoft
Initial release: July 27, 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 convert EMF to RB?

EMF is a Windows-specific graphics format — converting to RB lets you repurpose the content for e-readers and digital reading apps.

What software reads RB files?

You can open RB files with RocketBook devices, Calibre, or legacy RB e-book readers.

How does Convertio protect my files during conversion?

Your uploaded EMF files are deleted right after conversion, and RB results are wiped from servers within 24 hours.

Is my EMF file safe during conversion?

Uploaded EMF files are deleted immediately after conversion. RB output files are removed from servers within 24 hours for your privacy.

Is a Convertio account needed for EMF to RB?

No — you can convert EMF to RB without creating an account or providing any personal information.

Can I batch-convert multiple EMF files to RB?

Yes — upload several EMF files at once and Convertio processes them to RB in parallel, saving you time.