JSON Schema Validator & Checker
Validate JSON documents against JSON Schema definitions (Draft-04/06/07/2019-09/2020-12) to catch structure, data type, and constraint errors instantly.
What is JSON Schema Validation?
JSON Schema is a declarative language used to annotate, structuralize, and validate JSON data instances. It specifies expected data types, required object fields, string format constraints (such as email addresses or URIs), array boundaries, and numerical limits.
While standard JSON syntax validation only checks for correct punctuation and braces, JSON Schema Validation ensures that the content of the JSON document strictly adheres to your API contract or domain data model requirements.
Common JSON Schema Validation Keywords
| Keyword | Applicable Type | Description & Function |
|---|---|---|
type |
All Data Types | Defines the expected primitive type (object, array, string, number, integer, boolean, null). |
required |
object |
Specifies an array of property names that MUST be present in the target object. |
properties |
object |
Defines child key schema rules for each specific property key inside an object. |
minimum / maximum |
number / integer |
Constrains numerical values to fall within a specified inclusive range. |
pattern |
string |
Enforces string compliance against a Regular Expression (RegEx). |
enum |
All Data Types | Restricts the data instance value to an exact enumerated list of allowed values. |
How to use JSON Schema Validator & Checker
- Enter or paste the values requested in the input fields.
- Choose any options provided, then run an action button if the tool requires one.
- Review the result and copy or adjust it as needed.
JSON Schema Validator & Checker features
- Available tool controls: Validate Schema Compliance.
- Input and option fields: JSON Schema Definition:, JSON Data Payload:, Schema Compliance Report:.