LIS File Extension

LIS file icon

SQR Output Format

What is a LIS file?

The LIS extension is related to SQR Output Format and is classified in the Developer Files category, which contains 1166 files.

LIS files are supported by Windows. To open a LIS file, you can choose from 2 programs such as Notepad++ and Sublime Text.

Programs that support LIS files

How to open a LIS file?

If you cannot open a LIS file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.

Notepad++ and Sublime Text stand out as the preferred programs to manage LIS files effectively. To install the current version of Notepad++, go directly to the official Notepad++ Team website. The universal package for all operating systems is available there.

After successful installation, your operating system should seamlessly handle LIS files via Notepad++.

Set Notepad++ as the default LIS program

Change Default Program on Mac

  1. Right click or Control + left click on the desired LIS file;
  2. Choose "Open in Application" and click "Other";
  3. Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
  4. Select "All Programs" from this menu and proceed to search for Notepad++. Check the box next to "Always open in app" to set it as the default option.

Set default programs for Windows

  1. Start by right-clicking on your LIS file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
  2. In the pop-up window, select the Notepad++ application;
  3. Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening LIS files.

Solve problems with LIS files

LIS files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.

What are the ways to check if my LIS file is damaged?

LIS developer files that have become corrupted may display one or more of the following symptoms:

  • The file does not respond or shows errors when opening it;
  • The file exhibits poor performance during editing operations in Sublime Text;
  • The file stops responding or freezes in Notepad++ or other programs;
  • Unexplained LIS file size inflation;
  • Actions performed on the file result in the appearance of error notifications;

Why does Notepad++ crash or shut down frequently?

Insufficient updates for Notepad++ Team products can cause Notepad++ to crash. Be sure to regularly install the latest software updates.

Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.

Is there any specific software or utility that can help repair a damaged LIS file?

Use a recovery program to open the damaged LIS file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged developer files.

How to edit a LIS file?

To make changes to LIS files, you need specialized software that allows both opening and editing the developer files. Online LIS editors offer fewer capabilities than applications optimized for SQR Output Format.

Best LIS Editor Software in 2026

With the mentioned criteria in mind, we have assembled a selection of LIS editors.

LIS Editor SoftwareDeveloperPlatformsOverall Rating
Sublime TextSublime HQ PtyWindows, Mac OS, Linux4.8 out of 5 (42 reviews)
Notepad++Notepad++ TeamWindows4.1 out of 5 (40 reviews)