Professional JSON Validator
Advanced syntax and schema validation with detailed error reporting
JSON Input
Essential Validation Features
Professional-grade validation toolkit for modern development
Syntax Validation
Instantly validate JSON syntax with precise error location and detailed explanations
Schema Validation
Validate JSON against custom schemas with comprehensive compliance reporting
Detailed Error Reporting
Get specific error messages with line numbers and actionable fix suggestions
Performance Analysis
Analyze JSON size, depth, complexity with optimization recommendations
Security Checks
Detect potential security issues like oversized data and suspicious patterns
Structure Analysis
Examine JSON structure, data types, and get insights into data organization
Frequently Asked Questions
Everything you need to know about JSON validation and error handling
What is JSON validation and why is it important?
JSON validation ensures your JSON data follows proper syntax rules and structure. It's crucial for preventing runtime errors, data corruption, and API failures in applications. Our validator checks for syntax compliance, data type consistency, and structural integrity to maintain data quality throughout your development workflow.
What types of validation does this tool provide?
Our validator offers comprehensive validation including: JSON syntax validation (RFC 7159 compliance), JSON Schema validation (Draft 7, 2019-09, 2020-12), performance analysis with size and depth checking, security validation for oversized data detection, structure analysis with data type insights, detailed error reporting with line numbers and fix suggestions, and file upload support up to 100MB with progress tracking.
How does schema validation differ from syntax validation?
Syntax validation checks if JSON follows proper format rules (correct brackets, quotes, commas), while schema validation ensures the data structure and types match your specific requirements and business rules. Schema validation validates against custom schemas, checks required properties, validates data types and formats, ensures pattern compliance, and verifies nested structure requirements.
What common JSON errors can this tool detect and fix?
Our validator detects all common JSON errors: single quotes instead of double quotes, trailing commas after elements, unescaped special characters, missing brackets or braces, invalid data types, duplicate keys in objects, malformed escape sequences, and unexpected tokens. Each error comes with specific line numbers, character positions, and actionable fix suggestions.
Can I validate large JSON files and what are the performance capabilities?
Yes, our validator supports files up to 100MB with optimized processing. We provide performance analysis including file size metrics, nesting depth analysis, object/array counting, parse time measurement, memory usage optimization, progress tracking for large files, and performance recommendations for optimization. The tool uses efficient parsing techniques to handle enterprise-scale JSON data.
What JSON Schema versions and features are supported?
We support JSON Schema Draft 7, 2019-09, and 2020-12, along with custom validation rules. Features include: complete schema validation, custom type definitions, required property validation, pattern matching and regex validation, nested schema support, conditional validation, format validation for emails/dates/URIs, and integration with development workflows for API testing.
How do I use this tool for API development and testing?
Our JSON validator is perfect for API development: validate API responses and request payloads, ensure data consistency across endpoints, validate configuration files and environment settings, test mock data and responses, verify data contracts and schemas, debug integration issues, and export validation reports for documentation. It integrates seamlessly into development workflows for REST API testing and microservices debugging.
Is my JSON data secure during validation and can I export reports?
Absolutely secure! All validation happens locally in your browser with no data transmission to servers, ensuring complete privacy and security. You can export validation results as JSON, CSV, or PDF reports for documentation, team sharing, integration with other tools, and compliance reporting. The tool also performs security checks for oversized data and suspicious patterns.
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