Opening a JB2 File

The JB2 file type is primarily associated with jbig2dec.

JB2	File extension: JB2
	File type:	compressed image file

What is a JB2 file?

JB2 files mostly belong to jbig2dec. JB2 files are mostly used as JBIG2 image compression files that store black and white images.
Many of these files follow the JBIG2 standard, which compresses scanned document images efficiently.
Some files with the JB2 extension are linked to the JPEG 2000 format, used for images that may have more color or require a different compression method.
To open a JB2 file, use a specialized decoder like jbig2dec for JBIG2 image compression. For files using JPEG 2000, a viewer that supports JPEG 2000 (more info at JPEG 2000) can be used.

Check which compression standard your file uses.

Choose the correct viewing or decoding tool.

How can I open a JB2 file?

You need a suitable software like jbig2dec to open a JB2 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your JB2 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a JB2 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online JB2 File Viewer

Choose your .jb2 file to view

or drag and drop it here

Online File Viewer

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How to convert JB2 files to JPG, PNG, SVG, PDF, ...

1. To do so, click the "Choose your .jb2 file to view" button above.
2. After your file is opened in browser,
3. click "Save as..." in the menu.
4. Then choose the image format (e.g. JPG, PNG, TIFF, PDF, ...) you want.
5. Your file will be converted and downloaded.

JB2 file format:

If you can determine the file format, the associated program can also be determined. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. So a detailed analysis of a file is vital in order to determine the format and the associated program. In the following you will find our evaluation of the JB2 files:

JB2 is seldom used as a file extension and mainly uses a defined JB2 format. But the following two file formats are common:

• 80% of all JB2 files belong to JBIG2 bitmap. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. The file size is in the range of 380 bytes to 72 KB. This file type is based on cutting-edge technology. A common filename is 042_1.jb2 or image_103.jb2.
• 15% of all JB2 files start with the magic bytes 00 00 00, which are always the first bytes of this file format. They consist of illegible, cryptic characters. JB2 files are between 210 bytes and 59 KB in size.

All the rest of the JB2 files (5%) have different formats. Just click the "Choose your .jb2 file to view" button on this page to find out what your JB2 file is.