Extract text from COMcheck or PhET files (CCK)
To convert CCK project files to another format, you need COMcheck or other Data software.
To convert other file formats to the "Energy Compliance Project" file type, you need software like COMcheck or a similar tool.
The .CCK file extension represents a project file primarily associated with COMcheck, a software tool developed by the U.S. Department of Energy. These files contain critical data regarding a building's envelope, lighting, and mechanical systems, used to demonstrate compliance with commercial building energy codes (IECC/ASHRAE).
The Problem: .CCK files are proprietary data containers, not documents. You cannot double-click to open them in Word or view them in a browser. They are often legacy files (replaced by the newer CXL XML format), creating compatibility friction when trying to share compliance status with building departments or clients who lack the specific software version.
The Solution:
Secondary Use Case: A minority of .CCK files are simulation saves from PhET Interactive Simulations (specifically the Circuit Construction Kit). These are often XML-based and can be converted to readable text by opening them in a code editor like VS Code, though they are best viewed by loading them back into the PhET simulation.
Convert.Guru analyzes your CCK file, detects the exact format, and lets you read the text inside.
Users also converted PTS, ACI and PDT files.
If you want to convert CCK file to , you can use COMcheck or similar software from the "Building Energy Compliance Data" category. In the File menu, look for Save As… or Export….
To convert files to CCK, try COMcheck or another comparable tool in the "Building Energy Compliance Data" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CCK converter.