Appsettings.json Transformation Tester

What can it do?

ASP.NET Core introduced a great replacement for the loved/hated web.config file: appsettings.json. While web.config files are still around and used in many ASP.NET Core projects, the appsettings.json file is much simpler and easier to write.

Alongside the appsettings.json file, we also got a concept similar to Web.config transformations. By adding more files on the format appsettings.Environment.json you can easily override settings based on which environment your code is currently running. These transformations or overrides are simpler than the transformations based on XDT. With large configuration files, it can sometimes be a bit tricky to overview the result of a transformation. With our Appsettings.json Transformation Tester, you simply input both files and we will show you the changes applied by your environment-specific file.

Here are some additional resources for helping you solve common problems:

• AppSettings in ASP.NET Core
• Config transformations in ASP.NET Core
• Configuration with Azure App Services and ASP.NET Core
• Individual developer settings in ASP.NET Core
• ASP.NET Core (not that secret) User Secrets Explained
• Appsettings.json Validator
• JSON Formatter
• More posts coming soon!