OL File Extension
Valve Hammer Object Layout
- File Type ol
- Developer Valve Corporation
- Popularity
- Application Valve Hammer Editor
- Category Graphics Files
What is a OL file?
Files with the OL extension are specifically tied to Valve Hammer Object Layout, a Graphics Files type, and there are 556 files in this category.
Valve, the developer of the Valve Hammer Object Layout (OL), has released file format and 14 programs designed to handle them.
OL files are compatible with various operating systems, including Windows. There are 2 programs available to open a OL file, including popular tools like Valve Hammer Editor and WorldCraft.
How to open a OL file?
If you are having trouble opening a OL file, it usually means the right software is not installed. Choose a program from the list that matches your operating system. Next, visit the official website of the developer, download the software, and install it on your device.
Valve Hammer Editor and WorldCraft are among the most widely used programs for handling OL files. To set up the newest version of Valve Hammer Editor on your device, simply go to the official Valve website. There you can download the edition compatible with every operating system.
Once setup is done, your operating system should assign Valve Hammer Editor as the default app for OL files.
Set Valve Hammer Editor as the default OL program
Change Default Program on Mac
- Right click or Control + left click on the desired OL file;
- Choose "Open in Application" and click "Other";
- Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
- In this menu, choose "All Programs" and navigate to Valve Hammer Editor. Check the box next to "Always open in app" to make it the default program.
Change default programs in Windows
- To get started, right-click your OL file, then choose "Open With" and select "Choose Another Application" from the context menu;
- In the pop-up window, select the Valve Hammer Editor application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening OL files.
How to edit a OL file?
To modify OL files, it is necessary to install dedicated software that lets you open and edit graphics files. Online OL editors generally offer fewer tools compared to programs designed for Valve Hammer Object Layout.
Best OL editors 2026
Following these criteria, we have put together a list of recommended OL editors.
| OL Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Valve Hammer Editor | Valve | Windows | 4.3 out of 5 (42 reviews) |
| WorldCraft | Valve | Windows | 4.1 out of 5 (45 reviews) |
Convert files to and from OL
If you struggle with a OL file, consider converting it to alternative formats such as S or other similar file types.
It is important to understand that converting a OL file might limit certain functions, but this conversion is usually reversible.
Convert OL to other file formats
Solve problems with OL files
If you encounter issues with OL files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the steps to repair a damaged OL file?
Start a data recovery program and open the damaged OL file. Then, choose the "Repair" option from the menu. Please wait patiently for the recovery process to finish as it will automatically repair the damaged graphics files.
How can I determine if my OL file is damaged?
The signs of corrupted OL graphics files can manifest as:
- Trying to work with the archive in Valve Hammer Editor or other programs causes instability or program crashes;
- Error notifications appear during file manipulation;
- The file does not open correctly or displays error messages;
- An unexplained increase in the size of the OL file;
- The file shows slow performance when edited in Valve Hammer Editor;
What are the reasons behind Valve Hammer Editor crash?
Insufficient software updates are a likely cause of Valve Hammer Editor crashes. Be sure to install the latest updates for Valve products.
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.