JSON Beautifier & Formatter Online — Free Tool

Paste raw or minified JSON and get perfectly indented, readable output instantly. Features auto-repair, recursive key sorting, and an interactive tree view. Input is processed securely over HTTPS and is not stored.

Key Features

Customisable indentation with 2 spaces, 4 spaces, or tabs
Interactive tree view with collapsible nodes for deep structures
One-click alphabetical sorting of object keys recursively
Auto-fix common syntax errors such as unquoted keys or trailing commas
Processed on our server over HTTPS; input is not stored.
Choose your preferred indentation level (2 spaces, 4 spaces, or tabs).
Enable optional settings like alphabetical key sorting or auto-repair if desired.
Click "Format" to generate clean, readable JSON.
Copy the formatted output to your clipboard or download it as a .json file.

Example

Sample input

{"name":"Ada","skills":["logic","math"],"active":true}

Sample output

{
  "name": "Ada",
  "skills": [
    "logic",
    "math"
  ],
  "active": true
}

Edge Cases

Nested arrays with mixed types
Unicode keys and string values
Large minified API payloads

Frequently Asked Questions

Is my JSON data sent to any server?

Input is sent over HTTPS to our server, processed in memory, and returned. It is not stored or logged. Avoid pasting live production secrets.

Can this tool fix invalid JSON syntax?

Yes, the built-in auto-repair option can resolve common mistakes like trailing commas, unquoted property names, and single-quoted strings.

How does recursive key sorting work?

When enabled, the formatter traverses the entire JSON hierarchy and sorts all object keys in ascending alphabetical order at every nesting level.

Related Tools

JSON Minifier — Compress JSON Online Free JSON Validator — Check JSON Syntax Online JSON to YAML Converter — Online Free Tool JSON to XML Converter — Generate XML from JSON JSON String Escape Tool — Escape Strings for JSON

Privacy notice: when you run this tool, your input is sent over HTTPS to our server, processed in memory and returned. It is not stored or logged. Avoid pasting live secrets such as private keys or passwords.