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X11

x11 icon

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.

What is x11 file?

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.

How to open x11 file?

Use XnView to view *.x11 files.

How to convert x11 file?

Compatible tools are able to export *.x11 files to other formats.

Suggested software to open x11 file:

Associated software actions with the x11 file

Programs for viewing x11 files:

Multiplatform

Software apps that create x11 files:

Software apps that print x11 files:

Multiplatform

Related file extensions