json-schema-infer

Paste any JSON object, get a ready-to-use Pydantic model. Zero dependencies.

install

$ pip install json-schema-infer

Input → Output

user.json
{
  "id": 1,
  "name": "Alice",
  "score": 9.8,
  "active": true,
  "tags": ["admin"],
  "address": {
    "city": "Mumbai",
    "zip": "400001"
  }
}

models.py
from typing import List
from pydantic import BaseModel


class AddressModel(BaseModel):
    city: str
    zip: str


class UserModel(BaseModel):
    id: int
    name: str
    score: float
    active: bool
    tags: List[str]
    address: AddressModel

Type mapping

JSON type	Python annotation
string	`str`
integer	`int`
float	`float`
boolean	`bool`
null	`Optional[Any]`
array	`List[T]`
object	Nested `BaseModel`