🔧 API Response Formatter
Transform messy API responses into beautifully formatted, readable code with syntax highlighting, validation, and minification options. Perfect for developers working with REST APIs, GraphQL, and web services.
How to Use This API Response Formatter
How to Format API Responses:
- Paste your raw API response (JSON, XML, or plain text) into the input area
- Select the response format type (JSON, XML, HTML, or Auto-detect)
- Choose formatting options: Pretty Print, Minify, or Validate Only
- Optionally enable syntax highlighting for easier reading
- Click "Format Response" to see the beautified output
- Copy the formatted result or download as a file
Pro Tips: Use Auto-detect for unknown formats, enable validation to catch JSON/XML errors, and use minify to reduce file size for production APIs!
How It Works
The Science of API Response Formatting:
API formatters parse structured data and apply consistent indentation rules. Here's what happens under the hood:
- Parse Structure: Identify data type (JSON, XML, etc.) and parse into object tree
- Validate Syntax: Check for missing brackets, unclosed tags, or invalid characters
- Apply Formatting: Add consistent indentation (2-4 spaces per level) and line breaks
- Syntax Highlighting: Color-code different elements (keys, values, strings, numbers)
Example JSON Formatting:
Input: {"name":"John","age":25,"active":true}
Output:
{
"name": "John",
"age": 25,
"active": true
}Manual Formatting Rules:
- Each nesting level adds 2 spaces of indentation
- Objects: Each key-value pair on separate line
- Arrays: Each element on separate line (for readability)
- Strings: Always quoted, escape special characters
When You Might Need This
- • Format and debug API responses during development
- • Validate JSON and XML syntax for API testing
- • Create readable API documentation with formatted examples
- • Document API endpoints with properly formatted examples
- • Share formatted API responses in technical documentation
Frequently Asked Questions
What types of API responses can this tool format?
Our formatter supports JSON, XML, HTML, and plain text formats. The auto-detection feature can identify most common API response formats automatically, while manual selection allows you to specify the exact format type.
Is syntax highlighting available for all formats?
Yes, syntax highlighting is available for JSON, XML, and HTML formats. This feature color-codes different elements like keys, values, strings, and numbers to improve readability and make it easier to spot errors.
Does this tool store my API data?
No. All formatting happens in your browser and no data is sent to our servers. Your API responses and formatted output remain completely private and secure on your device.