SNB to BMP Converter

Free online SNB to BMP image conversion

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Lossless Page Capture

Convert SNB ebook pages to BMP for pixel-perfect, uncompressed image output — no compression artifacts, no quality loss.

Works Everywhere

BMP is natively supported on Windows, macOS, and Linux. Your converted pages open instantly without any special software.

Privacy Protected

Uploaded SNB files are deleted right after conversion. BMP output files are removed from Convertio servers within 24 hours.

How to convert SNB to BMP

1

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

2

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

3

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

About formats

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
BMP (Bitmap) is a raster image file format developed by Microsoft for the Windows operating system, introduced with Windows 3.0 in 1990. The format stores pixel data in a straightforward structure: a file header specifying dimensions, color depth, and compression method, followed by an optional color palette and then the raw pixel array. BMP supports color depths from 1-bit monochrome through 4-bit and 8-bit indexed color to 16-bit, 24-bit true color, and 32-bit with alpha channel. Most BMP files store pixels uncompressed (BI_RGB), though optional RLE compression is available for 4-bit and 8-bit modes. Pixels are arranged in bottom-up row order by default, with each row padded to a 4-byte boundary. One advantage is absolute simplicity — the format has no complex encoding, filtering, or compression layers, making BMP files trivial to read and write programmatically in any language. This simplicity also means BMP images render with zero decoding overhead, useful in scenarios where decompression latency matters. The format's deep Windows integration is another strength: BMP is the native bitmap format for Windows GDI, clipboard operations, and device-independent bitmap (DIB) handling, ensuring first-class support across the entire Windows ecosystem. While BMP's lack of compression produces large files unsuitable for web use or storage-constrained environments, it remains widely used as an intermediate format in image processing, as a clipboard exchange format, and in embedded systems where decoding simplicity outweighs file size.
Developer: Microsoft
Initial release: 1990

Frequently Asked Questions

Why convert SNB to BMP?

SNB only opens on Bambook readers. BMP is an uncompressed image format every Windows and macOS machine can display natively.

What applications open BMP files?

Windows Paint, Photos, macOS Preview, GIMP, Photoshop, IrfanView, and every standard image viewer handles BMP without plugins.

Are BMP files large?

BMP is uncompressed, so files are larger than JPG or PNG. The tradeoff is zero quality loss — every pixel is preserved exactly.

Does the converter work on Mac?

Yes. Convertio runs in any browser on any platform — Mac, Windows, Linux, Chrome OS, and mobile devices.

Is there a fee for this conversion?

No, SNB to BMP conversion is free on Convertio. Premium plans are available for batch and high-volume needs.

Can I use BMP images in documents?

Absolutely. BMP images embed easily into Word, PowerPoint, and other document formats for presentations or reports.

SNB to BMP Quality Rating

4.7 (3 votes)
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