JSON Schema 在线验证器

What Is JSON Schema Validator?

JSON Schema Validator is a free online tool that checks whether a JSON document conforms to a given JSON Schema. It uses the AJV library to validate your data against schema rules — reporting every constraint violation with a clear path and message, making it ideal for API development, configuration validation, and data quality checks.

How to Use JSON Schema Validator

1. Paste your JSON Schema into the left panel, or click Load Sample to try an example.
2. Paste the JSON data you want to validate into the right panel.
3. Click Validate to run the validation.
4. A green result means the data is valid. A red result lists every error with its path.

Features

• Validates JSON data against any JSON Schema (draft-07 and later)
• Reports all errors at once with field paths
• Powered by AJV — the most widely used JSON Schema validator
• Runs entirely in your browser — zero data uploaded

FAQ

What is JSON Schema?

JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It defines the structure, data types, and constraints that a JSON document must satisfy.

Which JSON Schema versions are supported?

The validator uses AJV which supports JSON Schema draft-07 and later, including draft-2019-09 and draft-2020-12.

Is my data sent to a server?

No. All validation happens entirely in your browser using the AJV library. Your data never leaves your device.