CTB File

What are CTB files and how to open them

Are you having problems opening a CTB file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your CTB files.

What is a CTB file?

CTB files have multiple uses, and AutoCAD Color-Based Plot Style is one of them. Read more about the other uses further down the page.

AutoCAD Color-Based Plot Style

These CTB files contain the color-based plotting of objects on each layer of an AutoCAD drawing. AutoCAD is a designing software released in 1982. Each layer is used as a color plotting property, meaning if the color of the layer changes, all objects on that layer change color.

How to open CTB files

Important: Different programs may use files with the CTB file extension for different purposes, so unless you are sure which format your CTB file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested eight different CTB openers which you will find listed below.

Last updated: January 22, 2025

All known file formats using extension .CTB

While AutoCAD Color-Based Plot Style is a popular type of CTB-file, we know of 2 different uses of the .CTB file extension. Different software may use files with the same extension for different types of data.

CherryTree Note (SQLite)

We know that one CTB format is CherryTree Note (SQLite). We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

These apps are known to open certain types of CTB files. Remember, different programs may use CTB files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about CTB file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.