JSON Formatter & Validator

Format, validate, minify and beautify JSON code instantly in your browser.

Input JSON

Indent:

Valid JSON!

701 characters · 701 B

Formatted JSON

{
  "store": "TechMart",
  "order": {
    "id": "ORD-2024-0081",
    "customer": {
      "name": "Sarah Johnson",
      "email": "sarah.j@example.com",
      "member": true
    },
    "items": [
      {
        "sku": "KB-001",
        "name": "Mechanical Keyboard",
        "price": 89.99,
        "qty": 1
      },
      {
        "sku": "MS-042",
        "name": "Wireless Mouse",
        "price": 34.5,
        "qty": 2
      },
      {
        "sku": "CB-100",
        "name": "USB-C Cable",
        "price": 9.99,
        "qty": 3
      }
    ],
    "shipping": {
      "method": "express",
      "cost": 12.99
    },
    "total": 191.96
  },
  "notes": "Handle with care",
  "giftWrap": false
}

Minified JSON

{"store":"TechMart","order":{"id":"ORD-2024-0081","customer":{"name":"Sarah Johnson","email":"sarah.j@example.com","member":true},"items":[{"sku":"KB-001","name":"Mechanical Keyboard","price":89.99,"qty":1},{"sku":"MS-042","name":"Wireless Mouse","price":34.5,"qty":2},{"sku":"CB-100","name":"USB-C Cable","price":9.99,"qty":3}],"shipping":{"method":"express","cost":12.99},"total":191.96},"notes":"Handle with care","giftWrap":false}

Saved 38.1% space

How to Use This JSON Formatter

Workflow

Paste your JSON into the editor. It formats automatically.
If invalid, use the "Auto Fix" button to clear trailing commas or comments.
Use Tree View to explore massive JSON files. Click any node to copy its path.
Use Convert to instantly generate TypeScript Interfaces, YAML, CSV, or XML.
Download or copy the minified version to optimize your API payloads.

Premium Features Included

Live Debounce: Formats as you type without freezing your browser.
Path Extraction: Perfect for writing MongoDB queries or JSONPath selectors.
TS Generator: Instantly generate TypeScript types for your API responses.
Deep CSV Flatten: Nested objects are safely flattened so they don't break your CSV tables.

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About This Tool

The JSON Formatter & Validator is a free online tool that takes your messy, minified, or broken JSON data and instantly turns it into clean, readable, color-coded code.

When you copy data from an API, it often looks like a giant wall of text, and finding a single missing comma can take hours. This tool formats your code automatically, highlights syntax errors so you can fix them instantly, and lets you collapse and expand sections.

It also includes powerful features like converting your JSON into TypeScript interfaces, YAML, CSV, or XML, and a Tree View to easily extract data paths. Everything runs locally in your browser, keeping your data private.

How to Use

1Paste your raw JSON data into the Input text box.
2The tool will automatically format and beautify your code in the Output box.
3If your JSON has an error, a red alert will appear telling you exactly what is wrong. Click "Auto Fix" to automatically remove trailing commas or comments.
4Use the tabs to explore your data (Tree View to visualize it, Convert to generate TypeScript or YAML).
5Click the "Copy" or "Download" buttons to save your formatted code.

Frequently Asked Questions

This is the most common JSON error. It usually means you have a missing comma between items, a trailing comma at the end of a list, or single quotes instead of double quotes. Paste your code into the tool, and it will highlight the exact line causing the problem.

Formatting (or beautifying) adds line breaks and indentations so humans can easily read the code. Minifying removes all the extra spaces and line breaks to make the file size as small as possible for computers to download it faster. This tool can do both.

Yes! Go to the "Convert" tab, and the tool will instantly generate a TypeScript Interface based on the structure of your JSON data. This is a massive time-saver for developers who don't want to type out interfaces manually.

The Tree View visually collapses your JSON so you can easily explore massive files without scrolling forever. If you click on any piece of data, it will copy its exact "path" (like user.profile.email), which is incredibly helpful when writing database queries or API requests.

Absolutely. All formatting and validation happen directly inside your web browser using JavaScript. Your code and data are never uploaded to a server, meaning your backend logic and private data remain completely secure.

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