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How to prettyprint a JSON file?

stackoverflow.com › questions › 12943819 › how-to-prettyprint-a-json-file

Use the indent= parameter of json.dump() or json.dumps() to specify how many spaces to indent by:

>>> import json
>>> your_json = '["foo", {"bar": ["baz", null, 1.0, 2]}]'
>>> parsed = json.loads(your_json)
>>> print(json.dumps(parsed, indent=4))
[
    "foo",
    {
        "bar": [
            "baz",
            null,
            1.0,
            2
        ]
    }
]

To parse a file, use json.load():

with open('filename.txt', 'r') as handle:
    parsed = json.load(handle)

Answer from Blender on Stack Overflow

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json.dumps() in Python - GeeksforGeeks

Example 4: This example shows how json.dumps() converts a Python list into a JSON-formatted string, which is commonly used when sending list data through APIs.

Published January 13, 2026

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How to Pretty Print JSON in Python | DigitalOcean

September 16, 2025 - Learn how to pretty print JSON in Python using built-in tools like json.dumps() and pprint to improve readability and debug structured data efficiently.

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docs.python.org › 3 › library › json.html

JSON encoder and decoder — Python 3.14.3 documentation

The json module can be invoked as a script via python -m json to validate and pretty-print JSON objects.

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How do I pretty print JSON in Python?

Click Execute to run the Python Pretty Print JSON example online and see result. ... import json ugly_json = '[ {"Customer": 1, "name": "Alice", "country": ["Spain", "Madrid"]}, \ {"Customer": 2, "name": "Jack", "country": ["UK", "London"]} ]' parsed_json = json.loads(ugly_json) pretty_json = json.dumps(parsed_json, indent=2) print(pretty_json)

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How to Pretty Print a JSON String in Python | by Blogshub | Medium

December 22, 2024 - Here’s an example of pretty-printing a minified JSON string: ... # Minified JSON string json_data = '{"name": "Dharmender", "age": 25, "city": "Bangalore"}'# Convert to Python object parsed_data = json.loads(json_data)# Pretty print with indentation pretty_json = json.dumps(parsed_data, indent=4) print(pretty_json)

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How to Pretty Print JSON in Python

April 14, 2023 - To pretty print JSON in Python, we can use the built-in json module. This module provides a dumps() function that can serialize Python objects into a JSON formatted string. By default, this function produces a JSON string without any formatting, ...

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Python - Pretty Print JSON - GeeksforGeeks

July 23, 2025 - If the indent parameter of json.dumps() is negative, 0, or an empty string then there are no indentations and only newlines are inserted. By default, the indent is None and the data is represented in a single line. The code takes a JSON string containing student records, parses it into a Python data structure, then pretty...

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Python JSON Pretty Print | Guide (With Examples)

February 1, 2024 - We then use the json.dumps() function with the indent parameter set to 4. This formats the JSON data with 4 spaces of indentation, making it easier to read. The result is then printed to the console.

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stackoverflow.com › questions › 12943819 › how-to-prettyprint-a-json-file

python - How to prettyprint a JSON file? - Stack Overflow

Use the indent= parameter of json.dump() or json.dumps() to specify how many spaces to indent by:

>>> import json
>>> your_json = '["foo", {"bar": ["baz", null, 1.0, 2]}]'
>>> parsed = json.loads(your_json)
>>> print(json.dumps(parsed, indent=4))
[
    "foo",
    {
        "bar": [
            "baz",
            null,
            1.0,
            2
        ]
    }
]

To parse a file, use json.load():

with open('filename.txt', 'r') as handle:
    parsed = json.load(handle)

You can do this on the command line:

python3 -m json.tool some.json

(as already mentioned in the commentaries to the question, thanks to @Kai Petzke for the python3 suggestion).

Actually python is not my favourite tool as far as json processing on the command line is concerned. For simple pretty printing is ok, but if you want to manipulate the json it can become overcomplicated. You'd soon need to write a separate script-file, you could end up with maps whose keys are u"some-key" (python unicode), which makes selecting fields more difficult and doesn't really go in the direction of pretty-printing.

You can also use jq:

jq . some.json

and you get colors as a bonus (and way easier extendability).

Addendum: There is some confusion in the comments about using jq to process large JSON files on the one hand, and having a very large jq program on the other. For pretty-printing a file consisting of a single large JSON entity, the practical limitation is RAM. For pretty-printing a 2GB file consisting of a single array of real-world data, the "maximum resident set size" required for pretty-printing was 5GB (whether using jq 1.5 or 1.6). Note also that jq can be used from within python after pip install jq.

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How to Prettyprint a Json File in Python? | Better Stack Community

import json # Load JSON data from a file with open('file.json', 'r') as file: json_data = json.load(file) # Pretty print the JSON data pretty_json = json.dumps(json_data, indent=4) print(pretty_json) ...

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Pretty Print JSON in Python - GeeksforGeeks

July 12, 2025 - # Write Python3 code here import ... dumping the # data decides to what level # spaces the user wants. print(json.dumps(json_object, indent = 1)) # Difference in the spaces # near the brackets can be seen print(json.dumps(js...

Spark By {Examples}

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How to Pretty Print a JSON file in Python? - Spark By {Examples}

May 31, 2024 - # Import JSON module import json # Read JSON data from file with open('file.json', 'r') as f: data = json.load(f) # Pretty-print JSON data and write back to file with open('file.json', 'w') as f: json.dump(data, f, indent=4) This will read the ...

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Here is how to prettyprint a JSON file in Python

Here's an example that demonstrates how to pretty print a JSON file: import json # Load the JSON data from a file with open('your_file.json') as file: data = json.load(file) # Pretty print the JSON data pretty_json = json.dumps(data, indent=4) # Print or save the pretty printed JSON ...

JanBask Training

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How to prettyprint a JSON file? | JanBask Training Community

April 29, 2025 - import json data = {"name": "John", "age": 30, "city": "New York"} pretty_json = json.dumps(data, indent=2) print(pretty_json)

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How to dump Python object to JSON using json.dumps()?

indent - if specified then pretty-print JSON with that indent level · separators - separators to use when generating JSON output. To get a compact JSON use (',', ':'). sort_keys - if True, then dictionaries are sorted by key · To serialize a Python object to a JSON file, you can use the json.dump() method (without the "s") from the json module.

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json.dump() in Python - GeeksforGeeks

June 20, 2024 - Example: ... import json # python object(dictionary) to be dumped dict1 ={ ('addresss', 'street'):'Brigade road', } # the json file where the output must be stored out_file = open("myfile.json", "w") json.dump(dict1, out_file, indent = 6) ...

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You Must Know Python JSON Dumps, But Maybe Not All Aspects | Towards Data Science

January 20, 2025 - For example, we can let it become the PHP style as follows. json.dumps( my_dict, separators=('', ' => '), indent=2 ) JSON usually doesn’t care about the order of the items. Therefore, when we dump a Python dictionary to a JSON string, the ...

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Tips and Tricks - Python - prettyprint JSON with json.dumps | TestDriven.io

import json users = [ {"username": "johndoe", "active": True}, {"username": "Mary", "active": False} ] print(json.dumps(users)) # [{"username": "johndoe", "active": true}, {"username": "Mary", "active": false}] print(json.dumps(users, indent=2)) ...

rayobyte.com › blog › how-to-use-json-dumps-in-python

How to Store Scraped Web Data in Python Using JSON Dumps

March 26, 2025 - Metadata inclusion: Sometimes, when ... of the Python dictionary. In those cases, you’ll have to manually insert this information into the dictionary before calling ‘json.dump’. Custom serialization: In some advanced use cases, you might need to implement custom serialization logic by subclassing ‘json.JSONEncoder’. This allows for fine-grained control over how objects are serialized to JSON. The ‘indent’ parameter can be used to pretty-print the ...

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Python Pretty Print JSON [with 3 Examples] - codingem.com

January 23, 2023 - Python pretty-printed JSON has indentations, spacings, and separators for your convenience. To pretty-print, call json.dumps(indent,separator)