Python Dict to JSON Converterdefault=str

Convert Python dictionaries with single quotes, True/False/None, tuples, sets, and undefined objects into valid JSON.

Presets:

Stringify Objects (default=str)Convert undefined objects & functions (datetime, ObjectId) to strings

Convert Tuples & SetsConvert Python (...) and {...} to JSON arrays [...]

Sort Keys AlphabeticallyOrder dictionary keys alphabetically

JSON Indentation

Parsing Status

Valid JSON Output

Keys Count

Stringified Objects (default=str)

Max Depth

Python Dictionary Input283 chars • 9 lines

Formatted JSON Output276 chars

{
  "id": "ObjectId('60d5ecf89234123456789abc')",
  "user": "alice_dev",
  "is_active": true,
  "last_login": "datetime.datetime(2026, 7, 25, 14, 30, 0)",
  "balance": "Decimal('1450.75')",
  "session_uuid": "UUID('9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d')",
  "metadata": null
}

FAQ

Frequently Asked Questions

Everything you need to know about this tool

In Python, passing default=str to json.dumps() stringifies any non-serializable object by calling str(obj). This converter emulates that behavior locally in browser JS, transforming expressions like datetime.now() or ObjectId("...") into clean JSON strings.

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