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JSON Schema Validator

Validate JSON against a supplied draft-07 schema and report field errors locally.

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  1. 01

    Add your input

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  2. 02

    Make it yours

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  3. 03

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JSON Schema checker online

Validate sample JSON against an explicitly supplied schema. Schema validation checks declared constraints, not the truth or authorization of the data.

How to use it

Enter JSON document or select Try example. Provide JSON Schema (draft-07) in the second editor. Review the displayed input. Select Run tool and inspect the result before copying or downloading.

Worked examples

Validate sample JSON against an explicitly supplied schema.

Worked example — JSON Schema Validator

Settings: No additional options

Input:

{"name":"Anna","age":25}

SECOND INPUT:
{"$schema":"http://json-schema.org/draft-07/schema#","type":"object","required":["name","age"],"properties":{"name":{"type":"string"},"age":{"type":"integer","minimum":0}},"additionalProperties":false}

Output:

Valid: the document matches the schema.

Choose the right tool

A document can be valid JSON syntax while failing the supplied schema. Use JSON Formatter for syntax and indentation; use this tool for the supported draft-07 schema constraints.

Limitations and common mistakes

  • Schema validation checks declared constraints, not the truth or authorization of the data.

Frequently asked questions

How can I check JSON against a schema online?

Enter JSON document or select Try example. Provide JSON Schema (draft-07) in the second editor. Review the displayed input. Select Run tool and inspect the result before copying or downloading.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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