JSON Formatter
Format, validate, and beautify JSON data instantly. Support syntax highlighting, error detection, and minification. Free online JSON formatter with no server upload.
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jsonFormatter.inputJson
jsonFormatter.output
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What is JSON Formatter & Validator?
JSON (JavaScript Object Notation) has become the standard data interchange format for web APIs, configuration files, and data storage. Working with JSON often requires formatting minified data for readability, validating structure correctness, or compressing formatted JSON to reduce file size.
Our JSON Formatter & Validator provides a comprehensive solution for all these tasks. This powerful online tool processes everything locally in your browser - your JSON data never leaves your device, ensuring complete privacy and security. Whether you're a developer debugging API responses, a data analyst working with configuration files, or anyone who needs to manipulate JSON data, this tool offers the features you need.
The tool is completely free to use with no registration required. Simply paste your JSON data, format or validate it instantly, and copy the results. No server uploads, no waiting times, no limitations.
How to use
- 1 Paste or type your JSON data into the input area
- 2 Select your preferred indentation size (2 spaces, 4 spaces, or tabs)
- 3 Click "Format" to beautify your JSON or "Minify" to compress it
- 4 View the formatted result with syntax highlighting
- 5 Use the copy button to copy the output with one click
- 6 Load sample data to test the tool functionality
- 7 Clear input and output to start fresh with new data
Common use cases
- ✓ API development and debugging - format API responses to make them easier to inspect
- ✓ Configuration file editing - maintain clean, readable configuration files
- ✓ Data structure visualization - understand complex nested JSON structures
View full documentation for more use cases →