Welcome,
You can convert JSON to dictionary blocks in App Inventor.
Take this JSON as an example:
{
"name": "Tim Beaver",
"likes": ["dams", "engineering"],
"hasTowel": true,
"widgets": 42
}
This JSON is equivalent to the following dictionary blocks.
To turn a JSON to a dictionary, use this block from the Web component.

For example:
Also, you can read our FAQ section.
Next time, please remember to search the community first.

