URL Query Parameter Manager is a free, useful utility that is intended for use in the course of developing websites. It can be used to read and organize query parameters from the current web page and to store groups of key and value pairs as configurations. It can also be used to manage key and value pairs that are suggested when editing values, as well as to store and manage configurable settings.

There is a preview of a page so that you can see what the current parameters look like. It allows you to edit the parameters, to save them as a configuration, and to import or export configurations. It also has an export function that allows you to export the stored settings to a text file.

You can use the app to read, edit, and save query parameters. There's also a feature that allows you to suggest new key and value pairs and to add them to existing ones.