ATC file: How can I open a .ATC file?
The table below provides useful information about the .atc file extension. It answers questions such as:
- What is the .atc file?
- What program do I need to open a .atc file?
- How can the .atc file be opened, edited or printed?
- How can I convert .atc files to another format?
We hope you find this page helpful and a valuable resource.
✅ Autodesk AutoCAD Tool Catalog

The ATC file is an Autodesk AutoCAD Tool Catalog. Autodesk AutoCAD is a software application for computer-aided design (CAD) and drafting.
✅ AceText Collection File

The ATC file is an AceText Collection File. AceText is a smart software tool that simplifies working with text by enabling you to store, manage, edit and reuse text from a central location.
✅ AttacheCase Encrypted File

The ATC file is an AttacheCase Encrypted File. AttacheCase is a Japanese file encryption/decryption software.
✅ SimCity 4 Animation Texture Collection

The ATC file is a SimCity 4 Animation Texture Collection. SimCity 4 (SC4) is a city-building, urban planning simulation computer game.
✅ ACUCOBOL-GT Thin Client Command File

The ATC file is an ACUCOBOL-GT Thin Client Command File. ACUCOBOL-GT is a COBOL development system for extending and modernizing business-critical applications.
⚠ Be careful with .atc files.
It's important to know that the .atc file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .atc files. Be cautious when dealing with .atc files from unknown sources.
🚫 The .atc file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .atc file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Select an app to open this .atc file
It means that the operating system does not have a default app associated with the .atc file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .atc file. A context menu will appear.
- From the context menu, select Open with. Windows will display a list of recommended apps.
- If the desired app is listed, select it from the provided options.
- If you cannot find the appropriate app, you may need to install software that supports the specific file type.
If you don't know how to change the default app for the .atc file, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .atc file extension, write to us.