JSON Validator v1.0
Quickly validate your JSON and catch syntax errors before they break your application. Our validator provides detailed error messages with exact line numbers to help you fix issues fast.
No data uploaded – runs 100% in your browser
Used by developers in 120+ countries
v1.0 • Updated Nov 2025
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How to Use the JSON Validator
- Paste your JSON into the input field
- Click 'Validate' to check for errors
- Review any error messages with line numbers
- Fix the issues and re-validate until valid
What is JSON Validator?
A JSON validator checks whether your JSON data follows the correct syntax rules. It detects issues like missing commas, unmatched brackets, invalid characters, and improper formatting that would cause parsing errors.
Why Use a JSON Validator?
- Catches syntax errors before runtime
- Provides exact error locations with line numbers
- Validates against JSON specification
- Faster than manual debugging
- Essential for API development and testing
Frequently Asked Questions
What is a JSON Validator?
A JSON Validator checks your JSON data for syntax errors and structural issues, ensuring it's properly formatted and parseable.
Is this JSON Validator free?
Yes, this JSON Validator is completely free and runs entirely in your browser.
Is my data secure?
All processing is done locally in your browser. No data is uploaded or stored.