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🗂️ JSON Beautifier📉 JSON Minifier🔍 JSON Compare🔄 JSON → XML🔄 JSON → YAML📄 XML Formatter📊 JSON → CSV📥 CSV → JSON🔄 YAML → JSON✅ JSON Schema Validator🎨 HTML / CSS / JS
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Validate your JSON data against a JSON Schema — get clear error messages for every violation, instantly and privately.
JSON Schema Validator
Validate JSON against a basic JSON Schema entirely in your browser.
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Why use our JSON Schema Validator?
Schema Validation
Validate any JSON document against a JSON Schema and get clear, actionable error messages for every violation.
Detailed Errors
See exactly which property failed, what the expected type was, and where the error occurred in your data.
Fully Private
All validation runs in your browser. Your JSON data and schema are never sent to any server.
Instant Feedback
Results appear immediately — paste your JSON and schema and see validation results right away.
What is JSON Schema?
How to Validate Data
Frequently Asked Questions
What is JSON Schema?
JSON Schema is a vocabulary for annotating and validating JSON documents. It lets you define the structure, types, required fields, and constraints your JSON data must conform to.
Which JSON Schema draft is supported?
This tool supports JSON Schema Draft-07 and many common keywords including type, required, properties, enum, minLength, maxLength, minimum, maximum, and more.
What does a validation error mean?
A validation error means your JSON data doesn't match one of the rules in your schema — for example, a required field is missing, a value is the wrong type, or a number is out of range.
Can I validate nested objects?
Yes. JSON Schema supports deeply nested object and array validation through the properties, items, and $ref keywords, and this tool handles nested schemas correctly.