ICO to SNB Converter

Convert ICO images to SNB format online for free

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Icon Liberation

ICO files lock images into icon contexts — converting to SNB frees the visual content for use in presentations, websites, and print materials.

Quick Results

Most ICO to SNB conversions finish within moments — the entire upload, conversion, and download process takes well under a minute.

Secure Conversion

All ICO to SNB processing happens over encrypted connections. Uploaded files are purged immediately, converted files within 24 hours.

How to convert ICO 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

ICO is the icon file format for Microsoft Windows, introduced with Windows 1.0 in 1985 and serving as the standard container for application icons, file type icons, and shortcut icons throughout the Windows ecosystem. An ICO file bundles multiple image variants within a single container — each at different sizes (16x16, 32x32, 48x48, 256x256, and others) and color depths (4-bit, 8-bit, 24-bit, 32-bit with alpha) — allowing Windows to select the most appropriate image for each display context, from tiny taskbar buttons to large desktop icons. The container structure consists of an ICONDIR header, an array of ICONDIRENTRY records describing each variant, and the image data itself. Since Windows Vista, ICO files support embedded PNG-compressed images for the larger sizes (typically 256x256), dramatically reducing file size while maintaining quality with full alpha transparency. One advantage is automatic size adaptation — Windows pulls the optimal resolution from the ICO container for each context (Explorer list view, desktop tile, Alt-Tab preview), ensuring crisp display without the application managing separate image files. The format's operating system-level integration is another core strength: ICO files serve as the identity mechanism for executables, file associations, and shortcuts across all Windows versions, and web browsers use favicon.ico for website identity in tabs and bookmarks. ICO creation and editing is supported by image editors like GIMP, Inkscape, and dedicated icon tools, and the format remains essential for Windows application development.
Developer: Microsoft
Initial release: 1985
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 convert ICO to SNB?

Shanda Bambook format packages your icon for Bambook readers — used in the Chinese digital reading market for mobile ebook distribution.

Which apps support SNB files?

You can open SNB files with Shanda Bambook devices, Calibre. Free alternatives are available for every platform.

What happens to my uploaded files?

Your ICO files are automatically deleted right after conversion. The resulting SNB files remain available for download for 24 hours, then they are permanently removed.

Can I use this on Mac and Linux?

The converter is entirely browser-based — it works on macOS, Linux, Windows, and any other platform with a modern web browser. No OS-specific software needed.

How long does ICO to SNB conversion take?

Most conversions complete within seconds. Processing time depends on file size and server load, but the entire workflow typically finishes in under a minute.

Is batch ICO to SNB conversion available?

Absolutely — upload multiple ICO files simultaneously and convert them all to SNB at once. Batch mode saves considerable time on repetitive conversions.

ICO to SNB Quality Rating

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