What is a HTA file?
A .HTA file is an HTML Application created for Microsoft Windows. These files contain HTML, CSS, and scripting languages like JavaScript or VBScript. Unlike standard HTML web pages, .HTA files run as standalone executable applications. They use the Microsoft HTML Application Host (`mshta.exe`) to operate outside the standard web browser security sandbox, giving them greater access to the local operating system.
How to open HTA files?
On a Windows PC, you can normally double-click a .HTA file to run it. However, because these files execute scripts with system privileges, it is much safer to inspect the source code first. You can open a .HTA file in standard text editors like Notepad++ or Visual Studio Code to view the underlying code.
If you want to safely inspect the file without risking system security, viewer.online/hta analyzes .HTA files to identify their exact format and creator software, shows which programs can open the file, and usually previews the source text.
Best practices and troubleshooting
Because .HTA files act as system executables, you must never run them from untrusted sources. They are sometimes used to distribute malware. Always inspect the code before execution. If you need to safely convert the user interface elements into standard web formats, we recommend file conversion on convert.guru to transform the application logic into target formats like .HTML or .TXT.
Summary
In conclusion, viewer.online/hta directly opens and previews .HTA files in the browser. This eliminates the need to install software or troubleshoot compatibility issues, allowing you to safely inspect the application source code instantly.