# java-json-tools/json-schema-validator **Attribution required: if you use, quote, or summarise this content, you must credit and link back to [awesome-repositories.com](https://awesome-repositories.com/repository/java-json-tools-json-schema-validator).** 1,642 stars · 395 forks · Java · NOASSERTION ## Links - GitHub: https://github.com/java-json-tools/json-schema-validator - Homepage: http://json-schema-validator.herokuapp.com/ - awesome-repositories: https://awesome-repositories.com/repository/java-json-tools-json-schema-validator.md ## Description This library is a Java-based tool for enforcing data structure constraints and verifying technical formats against defined schema specifications. It functions as a processing utility that parses complex data structures while managing external schema references and circular dependencies. The engine distinguishes itself through an immutable processor design that enables thread-safe, concurrent validation without requiring external synchronization. It employs arbitrary-precision arithmetic to evaluate numeric constraints, preventing common floating-point rounding errors, and utilizes character-level processing to ensure Unicode-aware string validation for complex symbols. Developers can extend the core pipeline by registering custom keywords and format handlers to implement specialized business logic. The project provides comprehensive schema management, including structural compliance checking against meta-schemas, URI-based dependency resolution, and configurable schema loading. It supports detailed error reporting that continues validation across child elements even after parent failures, and includes a command-line interface for terminal-based data verification. ## Tags ### Part of an Awesome List - [JSON Processing](https://awesome-repositories.com/f/awesome-lists/data/json-processing.md) — Provides a robust engine for parsing, transforming, and validating complex data structures against defined schema specifications. - [Immutable Processors](https://awesome-repositories.com/f/awesome-lists/devops/concurrency-threading/thread-safe-assertions/immutable-processors.md) — Performs validation using immutable processors that allow a single instance to be shared safely across multiple concurrent application threads. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Features)) ### Software Engineering & Architecture - [JSON Schema Validation](https://awesome-repositories.com/f/software-engineering-architecture/json-schema-validation.md) — Validates JSON data against schema specifications with support for version switching and high-precision numeric values. ([source](https://github.com/java-json-tools/json-schema-validator#readme)) - [Schema Reference Resolution](https://awesome-repositories.com/f/software-engineering-architecture/api-reference-resolution/schema-reference-resolution.md) — Fetches and processes external schema definitions using various URI schemes while managing custom handlers and detecting circular dependencies. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Status)) - [Unicode Length Validations](https://awesome-repositories.com/f/software-engineering-architecture/array-schema-validation/minimum-length-validations/unicode-length-validations.md) — Evaluates string constraints using character-level processing to correctly handle complex Unicode symbols. - [Custom Validation Rules](https://awesome-repositories.com/f/software-engineering-architecture/custom-validation-rules.md) — Supports custom validation rules by allowing registration of unique keywords and format attributes. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Features)) - [Schema Keyword Functions](https://awesome-repositories.com/f/software-engineering-architecture/custom-validation-rules/asynchronous-validators/custom-validation-functions/schema-keyword-functions.md) — Allows developers to inject custom logic by registering new keywords and format handlers into the validation pipeline. - [Domain-Specific Validation Rules](https://awesome-repositories.com/f/software-engineering-architecture/domain-specific-validation-rules.md) — Enforces specialized business rules by extending standard validation logic with custom keywords and formats. - [URI Namespace Redirectors](https://awesome-repositories.com/f/software-engineering-architecture/dynamic-schema-mapping/schema-uri-mappings/uri-namespace-redirectors.md) — Controls how schemas are retrieved by preloading files, redirecting URI namespaces, and registering custom downloaders for various network protocols. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Features)) - [Validation Error Reporters](https://awesome-repositories.com/f/software-engineering-architecture/error-handling/parse-error-reporters/serialization-error-reporters/validation-error-reporters.md) — Supports detailed error reporting that continues validation across child elements even after parent failures to ensure comprehensive compliance tracking. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Status)) - [Arbitrary-Precision Arithmetic](https://awesome-repositories.com/f/software-engineering-architecture/integer-arithmetic/arbitrary-precision-arithmetic.md) — Uses arbitrary-precision arithmetic to evaluate numeric constraints and prevent floating-point rounding errors. - [Constraint-Based JSON Validators](https://awesome-repositories.com/f/software-engineering-architecture/json-schema-validation/json-syntax-validators/constraint-based-json-validators.md) — Provides a standalone command-line interface for validating JSON documents against schema requirements. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Whatsnew_22)) - [Multi-Threaded Batch Processing](https://awesome-repositories.com/f/software-engineering-architecture/multi-threaded-batch-processing.md) — Executes thread-safe validation tasks concurrently to maintain high performance during heavy data processing. - [Recursive Schema Resolvers](https://awesome-repositories.com/f/software-engineering-architecture/recursive-schema-resolvers.md) — Resolves external schema dependencies via URI and detects circular references to prevent infinite processing loops. - [Regular Expression Validations](https://awesome-repositories.com/f/software-engineering-architecture/regular-expression-validations.md) — Applies regular expressions to ensure uniform string validation across different computing environments. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Status)) - [Meta-Schema Validations](https://awesome-repositories.com/f/software-engineering-architecture/schema-design-standards/design-json-schema-validators/meta-schema-validations.md) — Verifies that schema definitions are structurally correct and fully compliant with the requirements of the core meta-schema. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Features)) - [Immutable State Patterns](https://awesome-repositories.com/f/software-engineering-architecture/software-architecture/architectural-patterns/layering-presentation/application-layer-architectures/state-management-architectures/immutable-data-strategies/immutable-state-patterns.md) — Encapsulates validation logic in immutable, thread-safe objects to enable concurrent execution without external synchronization. ### Development Tools & Productivity - [Java Validation Libraries](https://awesome-repositories.com/f/development-tools-productivity/java-validation-libraries.md) — Provides a Java-based tool for enforcing data structure constraints and technical formats using standard schema definitions. ### Data & Databases - [Date and Time Libraries](https://awesome-repositories.com/f/data-databases/date-and-time-libraries.md) — Verifies date and time strings against international standards with support for variable precision and time zones. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Whatsnew_22)) - [Numeric Precision Constraints](https://awesome-repositories.com/f/data-databases/numeric-fields/numeric-precision-constraints.md) — Enforces numeric precision constraints using arbitrary-precision arithmetic to avoid floating-point inaccuracies. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Status)) - [Networked Schema Resolvers](https://awesome-repositories.com/f/data-databases/schema-management/networked-schema-resolvers.md) — Resolves and loads external schema definitions across network protocols while managing URI namespaces. ### Scientific & Mathematical Computing - [High Precision Mathematics](https://awesome-repositories.com/f/scientific-mathematical-computing/high-precision-mathematics.md) — Verifies numeric and string data against strict constraints to prevent rounding errors and encoding issues. ### Web Development - [String Format Validators](https://awesome-repositories.com/f/web-development/string-format-validators.md) — Validates string values against technical standards including base64, cryptographic hashes, and URI templates. ([source](https://github.com/java-json-tools/json-schema-validator/wiki/Whatsnew_22))