JSONToTable

JSON Checker & Validator

Check, validate, and verify your JSON syntax instantly

Input

Loading editor...

Output

Formatted JSON will appear here

Paste JSON in the input area to get started

How to Check JSON - Step by Step Guide

Step 1

Input Your JSON Data

Let's check your JSON data for errors! You have several convenient options:

•
Paste directly: Copy your API response or JSON data and paste it into the input editor
•
Upload a file: Click "Upload" to select a .json or .txt file from your computer
•
Try the sample: Click "Sample" to load example data and see how the checker works

Example: JSON Input to Check

Here's an example of JSON data that needs checking:

{"name":"Sarah Chen","email":"sarah@company.com","age":29,"department":"Marketing","skills":["SEO","Content Strategy","Analytics"],"active":true,"projects":[{"id":"PROJ-001","name":"Website Redesign","status":"active","budget":15000},{"id":"PROJ-002","name":"Social Media Campaign","status":"completed","budget":8500}]}
Step 2

Automatic Checking & Validation

The checking happens instantly! As soon as you input JSON, the checker automatically:

•
Validates syntax: Checks for errors and highlights issues with precise line numbers
•
Detects structure issues: Identifies missing commas, brackets, or malformed objects
•
Provides clear feedback: Shows validation status with detailed error messages

Example: Validation Results

The checker validates and formats your JSON, confirming it's error-free:

{
  "name": "Sarah Chen",
  "email": "sarah@company.com",
  "age": 29,
  "department": "Marketing",
  "skills": [
    "SEO",
    "Content Strategy",
    "Analytics"
  ],
  "active": true,
  "projects": [
    {
      "id": "PROJ-001",
      "name": "Website Redesign",
      "status": "active",
      "budget": 15000
    }
  ]
}
Step 3

Review Validation Results

Get instant feedback on your JSON quality! The checker provides comprehensive validation results:

•
Valid JSON indicator: Green checkmark confirms your JSON is syntactically correct
•
Error detection: Red indicators show exact error locations with line numbers
•
Formatted output: View properly formatted JSON with syntax highlighting
Step 4

Export Your Validated JSON

Once your JSON passes validation, export it for use in your projects:

•
Copy to clipboard: One-click copying for quick integration into your applications
•
Download as file: Save as a .json file for later use or sharing
•
Minify option: Compress valid JSON for production deployment

Frequently Asked Questions

How do I check if my JSON is valid?

Simply paste your JSON into the checker above. The tool will instantly validate the syntax and structure, showing a green checkmark for valid JSON or highlighting errors with precise line numbers if issues are found.

What errors can the JSON checker detect?

The checker detects all common JSON errors including missing or extra commas, unmatched brackets or braces, incorrect quotes, invalid data types, trailing commas, and malformed key-value pairs. Each error is reported with its exact location.

Can the checker fix JSON errors automatically?

This tool validates and reports errors but doesn't auto-fix them. It shows you exactly what's wrong and where, making it easy to correct. For automatic error fixing, use our JSON Fixer tool.

Is it safe to check sensitive JSON data?

Yes, all validation happens in your browser. Your JSON data is never sent to our servers or stored anywhere. The checker runs entirely client-side, ensuring your data remains private and secure.

Can I check large JSON files?

Absolutely! The checker handles large JSON files efficiently. You can upload files directly or paste large JSON data, and it will validate everything quickly while maintaining accurate error detection and line-by-line validation.

Is the JSON checker free to use?

Yes, completely free with no limitations on file size, usage frequency, or features. No registration or sign-up required. Check unlimited JSON files with full validation, syntax highlighting, and error reporting.