Which JSON Schema drafts are supported?

Draft 2020-12, 2019-09, draft-07 (also used for draft-06) and draft-04. Auto reads the $schema keyword and falls back to 2020-12. $dynamicRef from 2020-12 is not supported and is reported when used.

Why is my $ref reported as unresolved?

Only references inside the schema you pasted can be resolved, such as #/$defs/address or an $id or $anchor defined in it. Paste referenced schemas into $defs to check them; nothing is downloaded.

Is my data sent anywhere?

No. Parsing and validation happen on this page. You can disconnect from the network after it loads and keep validating.

JSON Schema Validator — Draft 2020-12, 2019-09 & 07

Validate JSON against a JSON Schema online. Live errors with instance and schema paths, click to jump to the value. Drafts 2020-12, 2019-09 and 07. Private.

Draft

Schemaschema.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.com/order.schema.json",
  "title": "Order",
  "type": "object",
  "required": ["id", "customer", "items", "status"],
  "properties": {
    "id": { "type": "string", "pattern": "^ORD-[0-9]{6}$" },
    "customer": {
      "type": "object",
      "required": ["name", "email"],
      "properties": {
        "name": { "type": "string", "minLength": 1 },
        "email": { "type": "string", "format": "email" }
      }
    },
    "items": {
      "type": "array",
      "minItems": 1,
      "items": { "$ref": "#/$defs/item" }
    },
    "status": { "enum": ["pending", "paid", "shipped"] },
    "createdAt": { "type": "string", "format": "date-time" }
  },
  "additionalProperties": false,
  "$defs": {
    "item": {
      "type": "object",
      "required": ["sku", "quantity", "price"],
      "properties": {
        "sku": { "type": "string" },
        "quantity": { "type": "integer", "minimum": 1 },
        "price": { "type": "number", "exclusiveMinimum": 0 }
      }
    }
  }
}

Datadata.json

Results

The schema cannot be used

Checking…

Runs in your browser with @cfworker/json-schema. No $ref is fetched and nothing is uploaded.

Format references

Tool page updated: 2026-10-23

Results

Guide and example

Related tools

Format references