Free online tool to format an ugly JSON code, making it readable and pretty, with the proper indentation.
Paste your code or drag a file here
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JSON data can quickly become hard to read when it’s all in one line. With JSON Formatter Online, you can format, beautify, and validate JSON instantly in your browser. Whether you’re debugging an API response or cleaning up data, this free tool helps you visualize your JSON structure with ease.
JSON Formatter Online is a web-based tool that formats and indents JSON text into a structured and readable format. It can also validate your JSON to check if it’s correctly structured and free of syntax errors.
Paste your raw JSON and get a beautiful, readable tree view in seconds — no setup or installation required.
🎨 Beautify JSON – Instantly add indentation and line breaks for readability.
🧾 Validate JSON – Check your JSON syntax and highlight errors.
🔎 JSON Viewer – Expand and collapse nodes for easy navigation.
🌐 Completely Online – Works in your browser, no downloads needed.
🔒 100% Secure – Data is processed locally; nothing is uploaded.
Makes API responses easier to read and debug.
Ensures your JSON is valid before sending it to a server.
Helps developers, testers, and data analysts quickly analyze data.
Saves time compared to manual formatting or using code editors.
Paste your JSON data into the input box.
Click “Format” to beautify or “Validate” to check structure.
Instantly view formatted JSON or any syntax error messages.
That’s it — your JSON is now readable, clean, and verified.
Fast and lightweight JSON parser.
Detects invalid characters or missing braces instantly.
Works with large JSON files efficiently.
Perfect for debugging APIs, config files, or web app data.
Use JSON Formatter Online to format, validate, and beautify your JSON data instantly.
Ideal for developers, testers, or anyone working with APIs, configuration files, or structured data.
Make your JSON easy to read — free, fast, and online.