CTB Viewer

Upload and view CTB plot style files to analyze AutoCAD plot configurations, color mappings, and metadata.

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About This Tool

The CTB Viewer is a specialized online tool for viewing and analyzing AutoCAD CTB (Color-Dependent Plot Style Table) files. CTB files control how colors, line weights, and other properties are plotted from AutoCAD drawings. This tool allows you to upload CTB files and instantly view detailed metadata including plot style names, color mappings, line weights, screening percentages, and other plot settings. No AutoCAD software required - simply upload your CTB file and get a comprehensive breakdown of its contents with a clean, organized preview interface.

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How to Use

Click the upload area or drag & drop your CTB file
Wait for the file to be processed and parsed
View the extracted metadata including plot style count and file information
Browse through the detailed plot style table with color mappings and settings
Download or share the analysis results if needed

Frequently Asked Questions

Find Quick Answers

What is a CTB file?

A CTB (Color-Dependent Plot Style Table) file is an AutoCAD configuration file that defines how colors in a drawing are mapped to plotter output properties like line weights, screening percentages, and plot styles.

What information can I see from a CTB file?

You can view the number of plot styles, color mappings (1-255), line weights, screening percentages, plot style names, and other plot configuration settings stored in the CTB file.

Do I need AutoCAD to use this tool?

No, this tool works entirely in your web browser. You don't need AutoCAD or any CAD software installed to view and analyze CTB files.

What file size limits are there?

The tool can handle CTB files up to 10MB in size, which covers most standard plot style tables. Larger files may take longer to process.

Is my CTB file uploaded to your servers?

For processing, the file is temporarily uploaded to our secure servers where it's parsed and analyzed. Files are automatically deleted after processing and are not stored permanently.

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