Opening 256 Files

The 256 file type is primarily associated with Graphics Editor.

256	File extension: 256
	File type:	raster image file

What is a 256 file?

256 files mostly belong to Graphics Editor. A *.256 file can store one of two main types of data. The primary usage, noted in over half of observed cases, is as a 256 color image file. This means the file holds raster graphics that use an indexed palette limited to 256 colors, a method common in older systems and games.
In some instances, a *.256 file is instead a part of a set of segmented data – a partial RAR archive volume. Such files are one portion of a multi‐volume archive, and you must have the complete set to extract the full content.
Consider the following points:

If the file is an image, open it with a graphics editor that supports low-color indexed images.

If the file is an archive segment, ensure you have the accompanying parts and use an archive manager like WinRAR or 7‑Zip to reassemble the full archive.

FilExt.com note: Knowing the file’s origin and context helps in selecting the correct application to open and view its content.
Files with the extension 256 are often also jpg images or pdf documents, but zip compressed archives or medical images such as DICOM are also common. Use the Online 256 File Viewer on this page to find out the file format being used, and to view your 256 file.

How to open a 256 file

You need a suitable software like Graphics Editor to open a 256 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 256 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a 256 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online 256 Text Viewer

Choose your .256 file to analyze

or drag and drop it here

Online File Viewer

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256 file extension format:

Each file has a definite file format, that is, how the stored data is arranged in the file. The file format can be deduced from the file extension and the signature. File extension, signature and file format must match; otherwise errors will occur when the file is opened. Knowledge is power - this also applies when dealing with unknown or faulty files. Our examination of the 256 files comes to the following conclusion:

The 256 file extension is rarely used and includes various formats for various programs. The following file formats are most commonly found in 256 files:

• 45% of all 256 files start with the bytes BM crucial for this file format. They consist of unreadable binary data. The files are on average 320 KB in size and range from 120 KB to 1 MB. The file type was primarily used more than 10 years ago. The following filename is common: 00000000.256 or 00000409.256.
• 6% of all 256 files start with the magic bytes GFX , which are always the first bytes of this file format. These are binary files, so they do not contain words or text. Most of these files are 5 KB to 450 KB in size. The following keywords are characteristic: GFX. These files can be linked to ankzn.

The remaining 49% of all 256 files are different files with different signatures. If you want to find out which format your 256 file belongs to, just click on the button "Choose your .256 file to analyze".