DevToolHubPRO

JSON Prettifier & Formatter Online

Popular

Format, beautify, and indent JSON strings with custom tab or space indentation.

Advertisement
Indent:
Input JSON205 characters
Formatted Output
Sponsored Content

About JSON Prettifier

Paste your minified or unformatted JSON code to instantly format and beautify it with proper indentation, syntax coloring, and structural validation. All processing happens entirely in your browser — your sensitive API payloads and configuration files are never sent over the network.

Key Features & Capabilities

Instant formatting with 2-space, 4-space, or tab indentation
Live syntax validation with error line and column detection
1-click copy to clipboard and file download
Completely private: 100% client-side execution
Handles large payloads smoothly without browser freezing

How to Use JSON Prettifier

1

Paste or type your raw JSON string into the input editor.

2

Select your preferred indentation (2 spaces, 4 spaces, or tabs).

3

Click 'Format JSON' (or enjoy auto-format as you type).

4

Copy the formatted result or download it as a .json file.

Real-World Examples

Minified JSON to Formatted JSON
Input
{"user":{"name":"Alice","age":28,"roles":["admin","editor"]}}
Output
{
  "user": {
    "name": "Alice",
    "age": 28,
    "roles": [
      "admin",
      "editor"
    ]
  }
}
Minified single-line JSON is cleanly nested with 2-space hierarchy.

Frequently Asked Questions (FAQ)

Yes, 100%. All formatting and parsing happens locally in your web browser using modern JavaScript engines. Nothing is ever uploaded to any external server.

Related Developer Tools

JSON Minifier

Compress JSON data by stripping all whitespace, line breaks, and indentation.

Try tool

JSON Validator

Verify if your JSON is syntactically valid with precise error detection.

Try tool

JSON to CSV Converter

Convert JSON arrays and objects into CSV spreadsheet format with custom delimiters.

Try tool