Skip to content
Branch: master
Go to file

Latest commit


Failed to load latest commit information.
Latest commit message
Commit time


An image format for OpenComputers and ComputerCraft. See releases for JAR converter binaries.


To run CTIFConverter, you need Java 8.

java -jar CTIFConverter.jar -h

will be your best friend. Here's an example command:

java -jar CTIFConverter.jar -m oc-tier3 -P preview.png -o image.ctif image.png

will convert image.png to image.ctif and kindly save preview.png as a preview file. (The "-P preview.png" can be omitted)

java -jar CTIFConverter.jar -m cc -W 102 -H 57 -o image.ctif image.png

will convert your image into a ComputerCraft picture of at most 102x57. If you want to ignore the aspect ratio and force it to be exactly 102x57, use "-N".

Note when running on Windows

Download imagemagick for java, then add the path to an env variable called IM4JAVA_TOOLPATH


If you just want to view CTIF files, see the viewers directory.

  • ctif-cc.lua - ComputerCraft image viewer. "ctif-cc {file} [monitor side]" to use. If it errors about the image size being too large, keep in mind it operates on characters, while the converter operates on pixels - to convert from one to the other, multiply the width by 2 and the height by 3.

  • ctif-oc.lua - OpenComputers image viewer. Not optimized - expect it to load images slower than what you saw at BTM. Requires Lua 5.3.

An optimized OpenComputers viewer will be released as part of the promised-at-BTM15 release of OpenPoint soon.

OpenComputers note

To run this, you need to set the CPU's architecture to Lua 5.3, to do this, just sneak-click the cpu while holding it.


ChenThread Image Format, an image converter intended for Minecraft computer mods.


You can’t perform that action at this time.