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Output
JSON Formatter Pro is a fast, free and 100% browser-based tool to format, beautify, validate, minify and convert JSON data. Whether you are a developer debugging an API response, a data analyst cleaning up a dataset, or a student learning about JSON — this tool makes working with JSON effortless. No sign-up, no data upload, no server processing. Everything runs locally in your browser.
Transform minified or messy JSON into clean, indented and readable output. Choose between 2-space, 4-space or tab indentation to match your coding style.
Instantly check if your JSON is valid. Get clear error messages with details about what went wrong and where, so you can fix issues quickly.
Compress JSON by removing all whitespace and line breaks. Ideal for reducing payload size before sending data over APIs or storing in databases.
Convert JSON to CSV, YAML, XML, TOML or HTML Table with a single click. Perfect for importing data into spreadsheets, config files or documentation.
Visualize JSON as an interactive, collapsible tree. Expand and collapse objects and arrays to explore deeply nested structures at a glance.
Extract specific values using JSON Path expressions like $.users[0].name. Navigate complex JSON without writing code.
Alphabetically sort all keys in your JSON recursively. Useful for comparing two JSON objects or maintaining consistent key ordering.
Flatten nested JSON into dot-notation key-value pairs, or reverse the process. Great for working with flat databases or CSV exports.
Compare input and output side by side with a line-by-line diff viewer. Quickly spot additions, removals and changes between two JSON versions.
Work on multiple JSON documents at the same time. Each tab preserves its own content — switch between them without losing data.
Full-featured code editor powered by CodeMirror with syntax highlighting, line numbers, bracket matching, code folding and auto-close brackets.
Your data never leaves your browser. There is no server, no upload, no tracking of your JSON content. Everything is processed locally on your device.
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is the most widely used format for transmitting data between a server and a web application, and is supported by virtually every programming language.
A JSON document is built on two structures: objects (collections of key-value pairs wrapped in curly braces {}) and arrays (ordered lists of values wrapped in square brackets []). Values can be strings, numbers, booleans (true/false), null, objects or arrays — allowing deeply nested data structures.
Here is a simple JSON object representing a user profile:
{
"name": "Pradyumn Thakur",
"age": 28,
"email": "pradyumn@example.com",
"active": true,
"skills": ["JavaScript", "Python", "SQL"],
"address": {
"city": "Delhi",
"country": "India"
}
}You can paste this directly into the tool above to try formatting, validating, converting to CSV, exploring in Tree View, or querying with JSON Path like $.address.city.
A JSON formatter is a tool that takes raw, minified or unstructured JSON data and converts it into a clean, indented and human-readable format. It helps developers quickly understand the structure and content of JSON data.
Yes, completely free with no limits. There is no sign-up, no premium tier and no usage cap. Use it as much as you need.
Absolutely. All processing happens entirely in your browser using JavaScript. Your JSON data is never sent to any server, never stored remotely and never shared with anyone. You can even use this tool offline after the page loads.
Yes. Click the Validate button and the tool will instantly tell you if your JSON is valid or show you the exact error message with details about what is wrong.
You can convert JSON to CSV (for spreadsheets), YAML (for config files), XML (for legacy systems), TOML (for modern configs) and HTML Table (for documentation or reports).
Yes. The tool supports multiple tabs. Click the + button to create a new tab, and each tab maintains its own independent JSON content. You can switch between tabs without losing data.
JSON Path is a query language for JSON, similar to XPath for XML. You can type expressions like $.products[0].name to extract specific values from your JSON. Enter the path in the JSON Path input field and click Query.
Once the page is fully loaded (including CodeMirror from CDN), all features work without an internet connection. Your data is processed locally in the browser.
There is no hard limit. The tool can handle JSON files of several megabytes. Performance depends on your browser and device — modern browsers handle large files efficiently.
Ctrl+Shift+F — Format, Ctrl+Shift+M — Minify, Ctrl+Shift+V — Validate, Ctrl+T — New tab, Ctrl+F — Find in editor, Ctrl+Z — Undo, Ctrl+Shift+Z — Redo.
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