JSON Schema Generator

Generate a JSON Schema (draft-07 or 2020-12) from any JSON sample. Infers types, formats, and required keys. Free, private, runs in your browser.

JSON Schema draft

Detect string formats
email, uri, uuid, date-time, ipv4Mark every key as required
Off = optional

JSON sample

Generated schema

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "format": "uuid"
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time"
    },
    "active": {
      "type": "boolean"
    },
    "score": {
      "type": "number"
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "address": {
      "type": "object",
      "properties": {
        "city": {
          "type": "string"
        },
        "postal": {
          "type": "string"
        }
      },
      "required": [
        "city",
        "postal"
      ]
    }
  },
  "required": [
    "id",
    "email",
    "createdAt",
    "active",
    "score",
    "tags",
    "address"
  ]
}