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X Window System bitmap image
File type: Bitmap image file
An x11 file extension is associated with the X Window System, a GUI for operating system, such as Linux, Unix, FreeBSD, etc. An x11 file stores bitmap image.
File type category:
Bitmap image file
Date updated: June 23, 2025
The x11 file extension is associated with the X Window System Graphical User Interface for network operating systems, such as UNIX, Linux, FreeBSD etc.
X Window System bitmap image file is a format for storing bitmaps of screen captures of the X Window system. There are a large number of variations of this format, depending on the type of graphics adapter the user has (monochrome, fixed colors, color images with palettes, TrueColor and more).
Additionally, x10 uses a different format from the newer x11 version of X Window. XWD files are not compressed so can be quite large.
Use XnView to view *.x11 files.
Compatible tools are able to export *.x11 files to other formats.
Programs for viewing x11 files:
Linux/Unix
Multiplatform
Software apps that create x11 files:
Linux/Unix
Software apps that print x11 files:
Multiplatform
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