JSON Validator
Validate, debug, and format your JSON data instantly. Free online syntax checker.
Input & Validation
Paste your JSON below to check validity.
Enter JSON and click Validate
Validate & Debug JSON Instantly
Stop guessing where the syntax error is. Our smart JSON validator parses your code in real-time, pointing out exactly where things went wrong. Perfect for debugging APIs, config files, and data payloads.
Why Use This Validator?
Error Detection
Pinpoint syntax errors immediately. We show you the error message to help you fix it fast.
Auto Formatting
Messy code? If your JSON is valid, we automatically beautify it with proper indentation.
Privacy First
Validation runs 100% in your browser. Your sensitive data is never sent to our servers.
Instant feedback
No loading screens. Get validation results instantly as you type or paste your code.
How this JSON Validator works
This data integrity tool verifies JSON document syntax checking for malformed structures, missing brackets, incorrect punctuation, or invalid data types that prevent proper parsing. The validator parses JSON strings reporting specific errors with line numbers and character positions enabling quick identification and correction of issues. Detailed error messages explain problems (unclosed strings, trailing commas, duplicate keys), suggest fixes based on common mistakes, and validate against JSON Schema specifications when provided. Users paste JSON receiving instant validation feedback, schema mode enforces structural requirements ensuring data conforms to expected formats, and batch validation processes multiple files identifying problematic documents. Visualization features highlight error locations with syntax coloring, comparison modes validate JSON equality accounting for property order differences, and formatting options beautify valid JSON for easier inspection. Applications include debugging API integration failures caused by malformed responses, validating user-generated JSON preventing application crashes, testing configuration files before deployment, or ensuring data exports meet specification requirements for third-party systems accepting only valid JSON.
How to Use
Paste JSON
Enter your JSON string or object into the input field.
Validate
Click the button to instantly check for syntax errors.
Format
If valid, copy the beautified JSON for your project.
Example Usage
Example input:
Frequently Asked Questions
Is my data safe?
Does it format JSON?
Why is my JSON invalid?
Related Tools
The JSON Validator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
