JSON Validator - Validate JSON Online
Validate JSON data online for free. Check JSON syntax, detect errors, and ensure your JSON is properly formatted.
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JSON Validator & Analyzer
Validate JSON syntax and analyze structure with detailed insights
JSON Input
Validation Result
Validated JSON will appear here
Paste JSON in the input area to validate and analyze
How to Validate JSON Data - Step by Step Guide
Input Your JSON Data
Start by adding your JSON data that needs validation. The tool will check syntax and detect any formatting errors.
Example: Try This JSON Data (Valid)
Copy and paste this valid JSON example: ✅
{ "employee": { "employeeId": 12345, "fullName": "Sofia Rodriguez", "department": "Engineering", "salary": 85000.50, "isRemote": true, "skills": [ "JavaScript", "React", "Node.js" ], "contact": { "email": "sofia.rodriguez@company.com", "phone": "+1-555-0123" } } }
Automatic Validation Process
The validator instantly checks your JSON syntax against RFC 7159 standards and provides real-time feedback! ⚙️
Get Validation Results
Receive instant feedback on your JSON's validity with detailed error messages and suggestions! ✨
Example: Invalid JSON (Missing Comma)
This JSON has a syntax error - can you spot it? ❌
{ "name": "Test User" "age": 25 <-- Missing comma! "active": true }
⚠️ Error: Expected ',' after property value at line 3
Validation Success
Valid JSON!
Your JSON syntax is correct and ready to use.
Fix Errors and Use Valid JSON
Perfect! Now you can confidently use your validated JSON in applications and APIs. 🚀
What is JSON Validation? 🔍
JSON validation is the process of checking JSON data against syntax rules to ensure it's properly formatted and can be parsed without errors. This verification process catches common mistakes like missing commas, unclosed brackets, invalid characters, and improper string formatting before they cause runtime issues.
A valid JSON document follows strict syntax rules defined in the JSON specification, making it compatible with all JSON parsers and ensuring reliable data exchange between systems and applications.
Frequently Asked Questions
How do I validate JSON syntax?
Paste your JSON data into the validator and it instantly checks for syntax errors. The tool highlights exact error locations with line numbers and provides clear descriptions of what needs to be fixed.
What are common JSON validation errors?
Common errors include missing commas between elements, unmatched brackets or braces, unquoted property names, trailing commas, and invalid escape sequences. The validator identifies all these issues with precise locations.
Can the validator handle large JSON files?
Yes! The validator efficiently processes large JSON files and provides fast validation results. It can handle complex nested structures and arrays with thousands of elements while maintaining accuracy.
Does validation fix JSON errors automatically?
The validator identifies and explains errors but doesn't auto-fix them to prevent unintended changes. It provides clear guidance on exactly what to fix, allowing you to make informed corrections to your JSON data. For automatic error repair, use the JSON Fixer tool.
Is validated JSON safe for production use?
Absolutely! Once JSON passes validation, it's guaranteed to parse correctly in all systems and applications. Valid JSON prevents runtime errors and ensures reliable data exchange between services.
Is the JSON validator free to use?
Yes, completely free with no limitations on file size, validation frequency, or features. No account required, and you can validate unlimited JSON files with detailed error reporting and suggestions.