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Python JSON - GeeksforGeeks

Last Updated : 23 Jul, 2025

Python JSON JavaScript Object Notation is a format for structuring data. It is mainly used for storing and transferring data between the browser and the server. Python too supports JSON with a built-in package called JSON. This package provides all the necessary tools for working with JSON Objects including parsing, serializing, deserializing and many more. 

Let's see a simple example where we convert the JSON objects to Python objects and vice versa.

Let's see a simple example where we convert the JSON objects to Python objects. Here, json.loads() method can be used to parse a valid JSON string and convert it into a Python Dictionary.

import json

# JSON string
emp = '{"id":"09", "name": "Nitin", "department":"Finance"}'
print("This is JSON", type(emp))

print("\nNow convert from JSON to Python")

# Convert string to Python dict
d = json.loads(emp)
print("Converted to Python", type(d))
print(d)

This is JSON <class 'str'>

Now convert from JSON to Python
Converted to Python <class 'dict'>
{'id': '09', 'name': 'Nitin', 'department': 'Finance'}

Let's see a simple example where we convert Python objects to JSON objects. Here json.dumps() function will convert a subset of Python objects into a JSON string.

import json

# JSON string
d = {'id': '09', 'name': 'Nitin', 'department': 'Finance'}
print("This is Python", type(d))

print("\nNow Convert from Python to JSON")

# Convert Python dict to JSON
obj = json.dumps(d, indent=4)
print("Converted to JSON", type(obj))
print(obj)

This is Python <class 'dict'>

Now Convert from Python to JSON
Converted to JSON <class 'str'>
{
    "id": "09",
    "name": "Nitin",
    "department": "Finance"
}

This JSON Tutorial will help you learn the working of JSON with Python from basics to advance, like parsing JSON, reading and writing to JSON files and serializing and deserializing JSON using a huge set of JSON programs.

• What is JSON?
• Data types in JSON
• Working With JSON Data in Python
• Read, Write and Parse JSON using Python

• Reading and Writing JSON to a File in Python
• Read JSON file using Python
• Append to JSON file using Python

• How to Parse Data From JSON into Python?
• How To Convert Python Dictionary To JSON?
• Python – Convert JSON to string
• Ways to convert string to json object
• Convert JSON data Into a Custom Python Object

• Serializing JSON in Python
• json.dump() in Python
• json.dumps() in Python
• Python – Difference between json.dump() and json.dumps()
• Deserialize JSON to Object in Python
• json.load() in Python
• json.loads() in Python
• Difference Between json.load() and json.loads()
• Encoding and Decoding Custom Objects in Python-JSON
• Serialize and Deserialize complex JSON in Python

• Python – JSON to XML
• Python – XML to JSON
• Convert CSV to JSON using Python
• Convert multiple JSON files to CSV Python
• Convert Text file to JSON in Python
• Saving Text, JSON and CSV to a File in Python

• JSON Formatting in Python
• Pretty Print JSON in Python
• Flattening JSON objects in Python
• Check whether a string is valid json or not
• Sort JSON by value

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