JSON (JavaScript Object Notation) is a lightweight, text-based format for storing and transferring data. It is human-readable and widely used for communication between browsers and servers.

Editing JSON is often required when working with APIs, configs, or large datasets. Our editor lets you modify, beautify and validate JSON instantly without complex tools or heavy software.

Working with large JSON files manually can be tedious. Our online editor helps you by:

• Adding or removing objects, keys, or values with ease.
• Automatically fixing indentation and formatting.
• Highlighting errors and showing line numbers for quick debugging.
• Beautifying messy JSON for readability.
• Minifying JSON for faster transfers and compact storage.

It saves time, prevents errors and keeps your JSON clean and valid.

• Simpler: JSON has fewer rules and attributes than XML.
• Lighter: JSON is shorter, faster and easier to parse.
• No ending tags: Unlike XML, JSON doesn’t require closing tags.
• Supports arrays: JSON can hold lists of values natively.
• Human-readable: JSON is self-describing and easier to learn.

While XML is still used in many systems, JSON is preferred for modern web development due to its simplicity and efficiency.

Valid JSON must follow these rules:

• Data is written in key/value pairs separated by a colon (:).
• Keys must be strings enclosed in double quotes.
• Values can be strings, numbers, objects, arrays, booleans, or null.
• Objects are enclosed in curly braces { }.
• Arrays are enclosed in square brackets [ ].

Our editor checks these rules automatically and highlights mistakes so you can correct them quickly.

Editing JSON is easy with our tool:

• Step 1: Paste or write your JSON in the input box.
• Step 2: Or upload a JSON file from your device, or enter a file URL.
• Step 3: Choose from options — Beautify, Minify, or Validate.
• Step 4: Use the Tree Editor for a structured view.
• Step 5: Copy, download, or save the edited JSON for use.

The editor automatically fixes indentation, removes comments and converts JavaScript objects into valid JSON.

Yes. The JSON Editor Online works entirely in your browser. No JSON files are uploaded or stored on any server — keeping your data completely private and secure.