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JSON Formatter & Validator

Parse, format, minify, and convert JSON data with surgical precision.

input.json
1
JSON
Ln: 1Col: 1
1
Ready
Ln: 1Col: 1

Ultimate JSON Formatter & Developer Tool

Dealing with messy or minified JSON data can be a headache for developers. Our JSON Formatter tool makes it incredibly simple to organize, format, and debug your JSON strings instantly. We go beyond basic formatting by offering interactive Graph Views and automatic TypeScript Code Generation directly in your browser.

Key Features of Our JSON Editor

  • Interactive Graph View: Visualize complex JSON data as an interactive, collapsible tree graph instead of reading raw text. Perfect for deeply nested objects.
  • TypeScript Code Generation: Instantly convert your JSON response into ready-to-use TypeScript interfaces. Save time manually writing types for your APIs.
  • Instant Validation: Quickly spot syntax errors. Our JSON Validator highlights the exact line and column where the formatting breaks, saving you hours of debugging.
  • Customizable Beautifier: Format your code exactly how you want. Choose between 2, 3, or 4 spaces of indentation for perfect readability.
  • Format Conversion: Not just a formatter! Easily convert your JSON payloads into XML or CSV formats with a single click.

Why Use an Online JSON Formatter?

JSON (JavaScript Object Notation) has become the standard format for data exchange across the web. However, raw JSON is often minified to save bandwidth, making it nearly impossible for humans to read.

Using our Online JSON Beautifier allows you to parse that raw data into a structured format. It also acts as an essential JSON Lint tool, helping you catch missing quotes, trailing commas, and mismatched brackets before they cause runtime errors in your applications.

Example of Valid JSON:
{
  "company": "PDFCraftor",
  "tools": [
    { "id": 1, "name": "JSON Formatter", "status": "Active" },
    { "id": 2, "name": "Graph Viewer", "status": "Active" }
  ],
  "isPremium": true
}
Quick Answer

Our JSON Formatter is an advanced developer tool that instantly beautifies, validates, and visualizes your JSON data directly in your browser.

  • Format & Validate: Auto-indent JSON with 2, 3, or 4 spaces and catch syntax errors instantly.
  • Graph View: Explore deeply nested JSON arrays and objects in an interactive, collapsible node tree.
  • Code Generation: Automatically generate ready-to-use TypeScript interfaces from any JSON structure.
  • 100% Private: All formatting and TS generation runs locally in your browser. No data is sent to our servers.

More Than Just an Online JSON Formatter

While standard JSON formatters just pretty-print your data, our tool acts as a Developer's Swiss Army Knife. Instantly parse, validate, and neatly format your JSON data with proper indentation. Switch to the Graph View to explore deeply nested JSON in an interactive node tree, or use the Types tab to automatically generate TypeScript Interfaces from your API payloads.

Who is this JSON Tool For?

This tool is designed for Frontend/Backend Developers, Data Analysts, and QA Engineers who regularly work with API responses and payloads. Whether you are debugging a broken endpoint, converting JSON to CSV/XML, or generating types for your React/Next.js application, everything runs locally in your browser so your sensitive data remains 100% private and secure.

Frequently Asked Questions

Yes! Simply paste your JSON data and switch to the "Types (TS)" tab. The tool will automatically analyze your JSON structure and generate properly typed TypeScript interfaces, saving you from writing them manually.
The Graph View represents your JSON data as an interactive, collapsible tree. This makes it significantly easier to navigate through large, complex, and deeply nested API responses compared to reading plain text.
Simply paste your raw JSON string into the input area. The tool will parse it and you can click "Format / Beautify" to neatly indent the code. You can choose between 2, 3, or 4 tab spaces for the indentation.
No. All processing, validating, and formatting happens locally in your browser. We never send your data to any server, ensuring complete privacy.
Yes! You can use the "Convert to" dropdown to easily convert valid JSON data into CSV or XML format. This is extremely useful for analyzing data in Excel.
Minifying JSON removes all unnecessary whitespace, newlines, and indentation. This reduces the file size, which is perfect when you need to send JSON data over a network or save it efficiently.
Yes, if there is a syntax error in your JSON, clicking "Validate" or attempting to format it will show exactly where the error occurred, helping you debug your data payload.