ASCX File Extension
ASP.NET User Control Format
- File Type ascx
- Developer Microsoft
- Popularity
- Application Adobe Dreamweaver
- Category Web Files, Developer Files
What is a ASCX file?
Files with the ASCX extension are associated with ASP.NET User Control Format and are categorized as Web Files and Developer Files, making up 1449 files.
The ASP.NET User Control Format (ASCX), created by Microsoft, is one of file format they developed, and they also built 242 programs to support them.
ASCX file support extends to various operating systems, including Windows. When working with ASCX files, you can rely on 6 programs, including Adobe Dreamweaver, Google Chrome and Internet Explorer.
Programs that support ASCX files
How to open a ASCX file?
If you can’t open a ASCX 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 ASCX files, Adobe Dreamweaver, Google Chrome and Internet Explorer are the top choices for users. To install the updated version of Adobe Dreamweaver, simply go to the Adobe site and download the installer compatible with all major platforms.
Once the process is complete, Adobe Dreamweaver should take over as the default application for ASCX files.
Set Adobe Dreamweaver as the default ASCX program
Changing Default Programs in Windows
- Right-click on your ASCX file, then choose the "Open with" option and select "Choose another application" from the available options;
- In the pop-up window, select the Adobe Dreamweaver application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening ASCX files.
Change Default Program on Mac
- Right click or Control + left click on the desired ASCX 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 Adobe Dreamweaver. Check the box next to "Always open in app" to make it the default program.
How to edit a ASCX file?
To edit ASCX files, it is essential to install software that supports not only viewing but also editing the web files. Online ASCX editors provide limited functionality compared to full-featured software for ASP.NET User Control Format.
List of Top ASCX editors 2026
Based on the criteria above, here is a selection of ASCX editors you can use.
| ASCX Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Adobe Dreamweaver | Adobe | Windows, Mac OS | 4.5 out of 5 (42 reviews) |
Solve problems with ASCX files
Rest assured, any issues with ASCX files can typically be addressed with simple software adjustments. See the tips below for help.
Why does Adobe Dreamweaver stop responding or crash intermittently?
Adobe Dreamweaver crashes can be caused by outdated software. Keep your Adobe 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 ASCX file that has gone bad?
Use a data recovery program to open the damaged ASCX 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 web files.
What are the warning signs that my ASCX file may be corrupted?
Common indications of damaged ASCX web files are:
- Error messages appear during the course of working with the file;
- Editing the archive in Adobe Dreamweaver 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 ASCX file;
- Opening the file in Adobe Dreamweaver or other programs causes them to hang or crash;