XWD to SNB Converter

Convert XWD images to SNB e-book format online

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E-Reader Ready

Convert XWD images into SNB format, ready for e-readers and reading apps. S-Note Document is supported by major e-book platforms.

Browser-Based Tool

No software to download — convert XWD to SNB entirely in your web browser. Works on any device with an internet connection.

Cross-Platform Access

Whether you are on a desktop, tablet, or phone — convert XWD to SNB from any device with a modern web browser.

How to convert XWD to SNB

1

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

2

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

3

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

About formats

XWD (X Window Dump) is a screen capture image format defined as part of the X Window System by the MIT X Consortium, dating to approximately 1987. The xwd command-line utility captures the contents of an X window or the entire screen and saves it as an XWD file — functionally equivalent to a screenshot utility but predating the concept by years. XWD files contain a detailed header specifying the X server's visual type, bit depth, byte order, bitmap unit and padding, the window's dimensions, border width, and color map information, followed by the raw pixel data exactly as represented in the X server's framebuffer. This means XWD files faithfully capture the exact pixel representation used by the display hardware — including server-specific byte ordering, padding, and color organization — making them primarily useful on the system where they were captured or on systems with compatible display configurations. The header also stores the window name string and the full color map entries for indexed-color visuals. XWD supports all X11 visual types: StaticGray, GrayScale, StaticColor, PseudoColor, TrueColor, and DirectColor, at any bit depth supported by the X server. One advantage is exact framebuffer fidelity: XWD captures the window's pixel data in its native format without any color space conversion or compression, making it the definitive record of what the X server was actually displaying. The format's integration with the X11 command-line toolkit provides another practical benefit — xwd can capture specific windows by ID or name, be triggered remotely via SSH, and piped directly to format converters. XWD files are handled by ImageMagick, GIMP, xwud (the viewer companion to xwd), and xv.
Developer: MIT X Consortium
Initial release: 1987
SNB is a proprietary ebook format developed by Shanghai Nutshell Electronics, a subsidiary of Shanda Interactive Entertainment, for the Bambook e-reader launched in August 2010. The format is structurally based on EPUB principles, packaging HTML content, CSS styling, images, and metadata within a compressed archive, but uses a proprietary container that restricts native playback to Bambook devices and associated software. Shanda designed the Bambook and its SNB ecosystem as an integrated reading platform tied to the Cloudary literature portal (later rebranded as China Literature), one of China's largest online publishing networks hosting millions of web novels and serialized fiction. The format supported reflowable text, chapter navigation, bookmarks, and basic typographic controls suited to Chinese-language content display. One advantage was tight integration with Shanda's massive content catalog, providing readers instant access to an enormous library of Chinese-language literature directly through the device. The Bambook was initially offered at a heavily subsidized price point, using the content ecosystem to drive revenue — a model that preceded similar strategies by other e-reader manufacturers. While the Bambook hardware line was eventually discontinued as the Chinese market shifted toward tablet-based reading apps, SNB files from that era can be converted to standard formats using tools like Calibre with appropriate plugins. The format represents an interesting case study in platform-specific ebook ecosystems within the Chinese digital publishing landscape.
Initial release: August 2010

Frequently Asked Questions

Why would I convert XWD to SNB?

SNB (Shanda Bambook e-reader format) lets you include XWD graphics in e-book collections, accessible on dedicated readers and mobile apps.

How do I open a SNB file?

Software that handles SNB includes Shanda Bambook, Calibre — giving you options on every major operating system.

How long does XWD to SNB conversion take?

Usually just seconds. XWD files are typically small, so the upload, conversion, and download process finishes very quickly on Convertio.

Is XWD to SNB conversion free?

You can convert XWD to SNB for free on Convertio. Premium plans are available if you need higher throughput or larger file allowances.

What exactly is the XWD format?

XWD is a screen capture format from X Window System. Originally from Unix/X11 screenshots, it has become a legacy format — conversion is the most practical way to use these images today.

Is my XWD file safe when converting online?

Your files are secure. Uploaded XWD images are erased immediately after processing, and SNB outputs are purged within 24 hours.