Devtoolsbox

JSON Formatter & Validator Online

Free online JSON formatter and validator. Format, validate, beautify and minify JSON data instantly. No registration required - works directly in your browser.

Input
Output
Examples
Try these examples to get started

JSON Format - Add indentation and line breaks

Input:
{"name":"John","age":30,"city":"New York","skills":["JavaScript","React","Node.js"],"profile":{"verified":true,"lastLogin":"2025-01-07T10:30:00Z"}}
Output:
{
  "name": "John",
  "age": 30,
  "city": "New York",
  "skills": [
    "JavaScript",
    "React",
    "Node.js"
  ],
  "profile": {
    "verified": true,
    "lastLogin": "2025-01-07T10:30:00Z"
  }
}

JSON Minify - Remove whitespace and compress

Input:
{
  "name": "John",
  "age": 30,
  "city": "New York",
  "skills": [
    "JavaScript",
    "React",
    "Node.js"
  ],
  "profile": {
    "verified": true,
    "lastLogin": "2025-01-07T10:30:00Z"
  }
}
Output:
{"name":"John","age":30,"city":"New York","skills":["JavaScript","React","Node.js"],"profile":{"verified":true,"lastLogin":"2025-01-07T10:30:00Z"}}

JSON Validate - Check syntax and structure

Input:
{"products":[{"id":1,"name":"Laptop","price":999.99,"specs":{"cpu":"Intel i7","ram":"16GB","storage":"512GB SSD"}},{"id":2,"name":"Mouse","price":29.99,"specs":{"type":"Wireless","buttons":5,"dpi":"1200"}}]}
Output:
✅ Valid JSON - No errors found!

Related Tools

Free online Base64 encoder and decoder. Encode text to Base64 or decode Base64 strings instantly with our easy-to-use tool.
Free online URL encoder and decoder. Encode URLs for safe transmission or decode URL-encoded strings instantly.