JSON Validator & Analyzer
Validate JSON syntax with detailed error reporting, schema validation, performance analysis, and intelligent suggestions for fixing common issues.
JSON Input
Advanced JSON Validation Features
Comprehensive validation toolkit for developers and data professionals
Syntax Validation
Instantly validate JSON syntax with precise error location and detailed explanations
Detailed Error Reporting
Get specific error messages with line numbers, character positions, and fix suggestions
Schema Validation
Validate JSON against custom schemas with comprehensive compliance reporting
Performance Analysis
Analyze JSON size, depth, complexity, and get optimization recommendations
Structure Analysis
Examine JSON structure, data types, and get insights into your data organization
Security Checks
Detect potential security issues like oversized data and suspicious patterns
File Upload Support
Upload JSON files up to 100MB with progress tracking and batch validation
Export Reports
Download validation reports as JSON, CSV, or PDF for documentation purposes
Validation Types & Standards
Support for multiple validation standards and custom rules
JSON Syntax
- • RFC 7159 compliance
- • Proper quote usage
- • Bracket/brace matching
- • Trailing comma detection
- • Invalid character detection
JSON Schema
- • Draft 7, 2019-09, 2020-12
- • Custom type definitions
- • Required property validation
- • Pattern matching
- • Nested schema support
Security Rules
- • Size limit validation
- • Depth limit checking
- • Suspicious pattern detection
- • Malformed data alerts
- • Performance impact analysis
Common JSON Issues & Solutions
Learn to identify and fix the most frequent JSON validation errors
❌ Common Errors
Single Quotes
{ 'name': 'John' } // ❌ InvalidJSON requires double quotes for strings
Trailing Commas
{ "name": "John", } // ❌ InvalidRemove comma after last element
Unescaped Characters
{ "path": "C:\Users" } // ❌ InvalidBackslashes must be escaped
✅ Correct Format
Double Quotes
{ "name": "John" } // ✅ ValidAlways use double quotes for strings
No Trailing Commas
{ "name": "John" } // ✅ ValidClean syntax without trailing commas
Escaped Characters
{ "path": "C:\\Users" } // ✅ ValidProperly escaped backslashes
Frequently Asked Questions
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.
How does schema validation differ from syntax validation?
Syntax validation checks if JSON follows proper format rules, while schema validation ensures the data structure and types match your specific requirements and business rules.
Can I validate large JSON files?
Yes, our validator supports files up to 100MB. For very large files, we provide progress tracking and performance analysis to help optimize your data structure.
What JSON Schema versions are supported?
We support JSON Schema Draft 7, 2019-09, and 2020-12, along with custom validation rules and extensions for specific use cases.
How do I fix JSON validation errors?
Our validator provides detailed error messages with line numbers, character positions, and specific suggestions for fixing each issue. Common fixes include adding quotes, removing trailing commas, and escaping special characters.
Is my JSON data secure during validation?
Absolutely! All validation happens locally in your browser. No data is transmitted to our servers, ensuring complete privacy and security of your JSON content.
Can I export validation reports?
Yes, you can export validation results as JSON, CSV, or PDF reports for documentation, sharing with team members, or integration with other tools.
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