ToolsHubJSON Validator
Validate your json code and identify syntax error quickly
JSON Input
Validation results
Validation Statistics
- Size
- 0 B
- Keys
- 0
- Depth
- 0
- Time
- 0.00 ms
How to Validate JSON Online?
Validating JSON is the process of checking if your JSON data is properly structured and follows the correct syntax rules defined by the JSON standard.
To validate your JSON:
- Paste your JSON into the input field above.
- Click “Validate”.
- Instantly see whether your JSON is valid or contains syntax errors, with problematic parts highlighted.
Why Use a JSON Validator?
Accurate Syntax Checking
Validate your JSON for missing brackets, commas, and structural issues in real-time with a single click.
Smart Error Highlighting
Pinpoint exactly where your JSON breaks - with colored highlights and instant suggestions to fix issues.
One-Click Auto-Fix
Fix common formatting problems automatically. Save time correcting brackets, commas, and structural errors.
Fast In-Browser Validation
Small JSON files (under 150KB) are validated directly in your browser - secure and lightning-fast.
Deep JSON Analysis
Get JSON stats: size, nesting depth, scan time, and validation speed - useful for developers working with APIs.
Privacy-Focused Validation
Larger files are processed server-side with zero data logging. Your JSON is never stored or analyzed beyond validation.
Example: Input & Results validation:
See what errors are found in your JSON.
Input
Result
Frequently Asked Questions about JSON Validator
What is a JSON Validator?
A JSON Validator is an online tool that checks if your JSON code is syntactically correct and highlights any errors instantly.
Why should I use a JSON Validator?
Validating JSON helps prevent bugs and issues in your applications by ensuring your data is properly structured before using it.
Is the JSON Validator free to use?
Yes. Our JSON Validator is completely free, works in your browser, and requires no account or registration.
Is my data safe when using this tool?
Yes. All validation happens directly in your browser - your JSON data never leaves your device.
What types of JSON does this validator support?
It supports any standard JSON - whether it's a simple object or a complex nested structure.