JSON Validator & Schema Linter
Validate JSON syntax and optionally verify against JSON Schema Draft-07. Detailed error messages with line and column pointers.
JSON Validator
What is JSON Validator & Schema Linter?
JSON Validator & Schema Linter is a quality-assurance tool that checks JSON documents for both syntactic correctness and optional structural compliance with JSON Schema Draft-04 Draft-06 Draft-07 and 2019-09. Syntax validation ensures the JSON is parseable properly paired braces and brackets correctly quoted string keys and values valid number formats no trailing commas and balanced escaping. Schema validation goes further verifying that the JSON structure adheres to a contract required fields are present types are correct string patterns match regex numeric values fall within specified ranges arrays contain the right item types and conditional logic if-then-else anyOf oneOf is satisfied. This validator pinpoints errors with precise line number column number and JSONPath location provides human-readable error descriptions expected string but got number at dollar dot users bracket zero bracket dot age and highlights the error location directly in the editor. Common JSON Schema use cases include validating REST API request response payloads against OpenAPI specs verifying configuration files before deployment and checking data pipeline outputs against schema contracts before loading into data warehouses.
When to Use JSON Validator & Schema Linter
Use when validating API payloads against OpenAPI schemas, checking config files before deployment, verifying data pipeline outputs, debugging JSON parse errors, or designing JSON Schema contracts.
How to Use JSON Validator & Schema Linter
Paste JSON for instant syntax validation. For schema validation, paste a JSON Schema document in the schema pane. Errors display with line/column/JSONPath and human-readable descriptions.
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