JSON Validator with Schema

This tool validates JSON data against a provided schema to enforce contract correctness and data integrity across APIs and data pipelines. It supports JSON Schema Draft 2020-12, deep reference resolution, and standard keywords such as type, properties, required, enum, format, pattern, allOf/anyOf/oneOf, and not. It reports errors with exact JSON Pointer paths and concise messages, enabling precise remediation. The validation engine accepts single documents or batches, returning per-document validity and detailed error sets to streamline debugging and testing workflows. It is designed for developers, QA engineers, and data professionals who rely on predictable data structures for integrations, configurations, and API payloads. Core differentiators include explicit error localization, robust $ref handling, and batch validation without external tooling. The tool emphasizes deterministic behavior, clear diagnostics, and compatibility with common schema constructs, making it suitable for CI pipelines, API contract testing, and data quality assurance. By separating parsing, schema loading, and validation phases, it supports extensibility (custom keywords) and scalable validation strategies for large payloads. Use cases include API parameter validation, configuration file checks, and data ingestion pipelines where schema conformance is critical. The result is a reliable, repeatable validation process that helps teams ship robust data contracts and reduces downstream defects through early detection.