TOL file extension
The table below provides useful information about the .tol file extension. It answers questions such as:
- What is the .tol file?
- What program do I need to open a .tol file?
- How can the .tol file be opened, edited or printed?
- How can I convert .tol files to another format?
Table of Contents
- ✅ Zemax Tolerance Settings
- 🔄 .tol file converters
- 🚫 .tol file related errors
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ Zemax Tolerance Settings

TOL file is a Zemax Tolerance Settings. ZEMAX is the software that optical engineers and designers around the world choose for lens design, illumination, laser beam propagation, stray light, freeform optical design and many other applications.
Other types of files may also use the .tol file extension.
🚫 The .tol 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 .tol 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:
Windows cannot open this file:
example.tol
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .tol file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .tol file extension, write to us!