FO File Extension
XSL-FO Form
- File Type fo
- Popularity
- Application Digiform Document Designer
- Category Data Files
- Format XML
What is a FO file?
XSL-FO Form, identified by the FO extension, is a Data Files type and includes 6196 files.
FO file support extends to various operating systems, including Windows. When working with FO files, you can rely on 2 programs, including Digiform Document Designer and 602XML Filler.
How to open a FO file?
If you can’t open a FO file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
When it comes to opening and working with FO files, Digiform Document Designer and 602XML Filler are the top choices for users. To install the updated version of Digiform Document Designer, simply go to the Metafocus AS site and download the installer compatible with all major platforms.
Once the process is complete, Digiform Document Designer should take over as the default application for FO files.
Set Digiform Document Designer as the default FO program
Changing Default Programs in Windows
- Right-click on your FO file, then choose the "Open with" option and select "Choose another application" from the available options;
- In the pop-up window, select the Digiform Document Designer application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening FO files.
Change Default Program on Mac
- Right click or Control + left click on the desired FO file;
- Select "Open in application" and click "Other";
- At the bottom of the window, you will find the "Enable" menu. Default, will be set to "Recommended Programs";
- Choose "All Programs" in this menu and search for Digiform Document Designer. Check the box next to "Always open in app" to make it the default program.
How to edit a FO file?
To edit FO files, it is essential to install software that supports not only viewing but also editing the data files. Online FO editors provide limited functionality compared to full-featured software for XSL-FO Form.
List of Top FO editors 2026
Based on the criteria above, here is a selection of FO editors you can use.
| FO Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| 602XML Filler | Software602 | Windows | 4.6 out of 5 (41 review) |
| Digiform Document Designer | Metafocus AS | Windows | 4.5 out of 5 (40 reviews) |
Solve problems with FO files
Rest assured, any issues with FO files can typically be addressed with simple software adjustments. See the tips below for help.
Why does Digiform Document Designer stop responding or crash intermittently?
Digiform Document Designer crashes can be caused by outdated software. Keep your Metafocus AS products up to date by installing the latest 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.
What are the best practices for repairing a FO file that has gone bad?
Use a data recovery program to open the damaged FO file and from the menu choose "Repair" function to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged data files.
What are the warning signs that my FO file may be corrupted?
Common indications of damaged FO data files are:
- Error messages appear during the course of working with the file;
- Editing the archive in Digiform Document Designer results in slow or unresponsive behavior;
- Opening the file results in an error or a failed attempt;
- Unexpected expansion of the total size of the FO file;
- Opening the file in Digiform Document Designer or other programs causes them to hang or crash;