DevUtilX

JSON Validator & Syntax Checker - Online Validation Tool

Validate JSON syntax, check for errors, and verify data structure instantly. Get detailed error messages with line numbers for quick debugging.

Enter JSON code and click "Validate" to check syntax

How to Use the JSON Validator

  1. Paste or type your JSON code in the input editor
  2. Click the "Validate JSON" button to check syntax and structure
  3. Review the validation result in the right panel
  4. If invalid, check the error message and line number for debugging
  5. For valid JSON, use the "Format JSON" button to beautify the code
  6. Copy the validated JSON using the copy button

💡 Pro Tip: This validator provides detailed error messages with exact line and column numbers, making it easy to identify and fix JSON syntax issues in APIs, configuration files, or data structures.

What is a JSON Validator?

A JSON (JavaScript Object Notation) Validator is a tool that checks if a given string is valid JSON. It ensures that the text adheres to the strict syntax rules of JSON, such as correct use of brackets, braces, quotes, and commas. This is essential for data interchange between a server and a web application, as JSON is a common format for such communication.

Why Use Our JSON Validator?

  • API Development: Verify that the JSON responses from your API are correctly formatted.
  • Configuration Files: Ensure that configuration files written in JSON are free of syntax errors.
  • Data Debugging: Quickly find and fix errors in JSON data that might be causing issues in your application.
  • Learning JSON: An excellent tool for beginners to understand the correct syntax of JSON.

🚀 Explore More Free Developer Tools

Don’t stop here! Supercharge your workflow with our other powerful converters & formatters.

✨ JSON Beautifier

Format and validate JSON data with proper indentation and structure

⚡️ JSON Minifier

Minify JSON data by removing whitespace and formatting

🚀 JSON to XML

Convert JSON data to XML format

💡 New tools are added regularly — bookmark DevUtilsX and stay ahead!

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