JSON Patch Builder Online
Do you know the JSON Patch format? The RFC6902 defines the structure to express a list of operations to apply over a JSON Document. This format is designed to be the payload of an HTTP PATCH method.
The format isn't difficult, you can easily understand the rules and build it manually. But, I confess that sometimes I struggle with it, specially when I'm testing a PATCH to a complex object. So... I built a Tool to help me.
JSON Patch Builder Online is a simple and Open Source tool that you can use to calculate the JSON Patch needed to transform a resource/entity in the resource that you want.
To accomplish that, I used JSON-Patch, a Javascript library, to calculate the Patch and BULMA CSS to have a good looking tool. I recommend that you go check them.
If you have something that you want to see in the JSON Patch Builder Online, feel free to open an Issue or Contribute.
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I hope that this helps you.