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Python JSON Module

The json module provides an API for parsing and creating JSON (JavaScript Object Notation). It is very similar to the pickle and marshal modules but uses a text-based format that is language-independent.

Importing the Module

import json

Parsing JSON (Decoding)

From a String

Use json.loads() to parse a JSON string into a Python dictionary or list.

import json

json_string = '{"name": "John", "age": 30, "city": "New York"}'
data = json.loads(json_string)

print(data["name"]) # Output: John

From a File

Use json.load() to read from a file object.

with open('data.json', 'r') as f:
    data = json.load(f)

Generating JSON (Encoding)

To a String

Use json.dumps() to convert a Python object into a JSON string.

import json

data = {
    "name": "Jane",
    "age": 25,
    "is_student": False
}

json_string = json.dumps(data)
print(json_string)

Pretty Printing

You can make the output more readable by using the indent parameter.

print(json.dumps(data, indent=4, sort_keys=True))

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Created: March 17, 2026 • Last Modified: January 28, 2026