Free Online JSON Formatter & Validator – Format, Minify & Validate JSON

JSON Formatter & Validator – Free Online Tool for Formatting, Validating & Beautifying JSON

Looking for the best online JSON formatter and validator? Look no further. Our free, browser-based JSON Formatter & Validator tool helps you cleanly format, validate, copy, and download your JSON data instantly. Built for developers, API testers, and students, this tool makes it effortless to work with JSON strings.

JSON (JavaScript Object Notation) is the most widely-used data format for API communication, configuration files, and data structures. Whether you’re debugging an API response or organizing data in a structured format, having a trusted JSON formatting tool is crucial.

Our tool ensures that your JSON is:

• ✅ Properly indented for readability
• ✅ Validated for structural integrity
• ✅ Easily minified for compact use
• ✅ Ready to be copied or downloaded

🔍 Why Use This JSON Formatter?

This tool is perfect for:

• Developers working on frontend or backend apps
• Students learning APIs and JSON structure
• QA testers validating RESTful responses
• Anyone working with large or nested JSON data

It works directly in your browser—no server calls, uploads, or installations required. 100% privacy-respecting and lightning fast.

✨ Key Features:

• Format JSON with indentation: Make your JSON readable with structured indentation.
• Minify JSON: Compress your JSON for compact storage or faster transfer.
• Validate JSON: Instantly catch and highlight syntax errors.
• Syntax Highlighting: Pretty-print your JSON with color-coded keys, strings, booleans, and nulls.
• Copy to Clipboard: Click a button to instantly copy formatted JSON.
• Download JSON File: Save your result as a downloadable .json file.
• Browser-Based: Everything runs securely in your browser. No data is sent to a server.

📘 Example Use Cases:

• Format API responses before inserting into code
• Validate webhook payloads
• Clean up manually typed JSON
• Minify JSON for production use