JSON Validator

Enter JSON and click Validate to see the result.

Why Use This Online JSON Validator?

Debugging syntax errors manually is time-consuming and prone to oversight. Our JSON Validator is a high-precision developer tool designed to verify code compliance instantly. It adheres to strict JSON standards (RFC 8259), detecting misplaced commas, unclosed brackets, and data type violations in milliseconds.

Unlike basic text editors, this tool doesn't just guess; it parses. If your code is invalid, it returns a specific error message pinpointing the issue, allowing you to fix API payloads and configuration files without the headache.

How to Check for Errors

1. Input Data: Paste your raw JSON string into the input field above.
2. Validate: Click the "Validate JSON" button to trigger the parser.
3. Debug: View the results immediately. A success message confirms validity, while an error message highlights exactly what needs fixing.

Frequently Asked Questions

What is a JSON Validator?

A JSON Validator is a utility that parses a string of text to ensure it conforms to the official JSON syntax rules. It confirms whether the data structure is readable by applications or contains syntax errors that would cause code execution to fail.

How do I validate a JSON file?

Open your file in a local editor, select all text, and paste it into the validator input above. Click "Validate JSON" to verify if the file contains syntax errors before deploying or committing your code.

What makes a JSON invalid?

Common syntax violations include trailing commas, using single quotes (instead of double quotes) for keys, unclosed braces or brackets, and including comments, which are not supported in the strict JSON specification.

How does an online JSON validator work?

The tool attempts to parse your input string using a standard JavaScript parsing engine. If the parsing succeeds, the data is valid. If it fails, the engine catches the exception and displays the specific error description to help you debug.

Is a JSON validator the same as a JSON linter?

No. A validator purely checks for syntax errors (will the code run?). A linter analyzes code for stylistic consistency, formatting conventions, and potential bad practices, even if the syntax is technically valid.