BIG5 file format description

Many people share .big5 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .big5 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .big5 files.

1 filename extension(s) found in our database.

.big5 - Chinese Text Document

The BIG5 document files are related to Notepad++. The BIG5 file is a Chinese Text Document. Big5 is a Chinese character encoding method used in Taiwan, Hong Kong, and Macau for traditional Chinese characters.

Document files
- / -
Chinese Text Document related extensions:
GNUe Form Definitions
Collage Maker Collage
Efficient Password Manager v2 Document
DynaCAD v6 Document
ActionOutline Outline
Mastercam X8 Document

Naturally, other applications may also use the .big5 file extension. Even harmful programs can create .big5 files. Be especially cautious with .big5 files coming from an unknown source!

Can't open a .big5 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .big5 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:


Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

EA Compressed Game Archive
Cartes Michelin Image
Prince of Persia: The Sands of Time Audio Data
Homeworld Game Archive

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .big5 file format, then write to us! >> BIG5 file