JSON Formatter & Validator
Paste raw JSON to format, beautify, minify, or validate it. View as a collapsible tree or formatted text with customizable indentation.
How to Use This JSON Formatter
Working with JSON data is a daily task for developers, and poorly formatted JSON can be difficult to read and debug. Paste your raw JSON into the input field above, then click "Format / Beautify" to add proper indentation and line breaks. The tool automatically validates your JSON and shows clear error messages with position details if the syntax is invalid. You can choose between 2-space and 4-space indentation to match your coding style. The "Minify" button removes all unnecessary whitespace to produce the most compact representation, which is ideal for reducing payload size in API responses or configuration files.
Tree View & Validation
Toggle the tree view to see your JSON data as an interactive, collapsible hierarchy. This makes it easy to navigate deeply nested objects and arrays, understand the structure at a glance, and find specific values without scrolling through thousands of lines. The validator catches all JSON syntax errors including missing commas, unquoted keys, trailing commas, and mismatched brackets, displaying the exact error message from the JavaScript JSON parser so you can quickly locate and fix issues.
Frequently Asked Questions
Is my JSON data safe?
Yes, all formatting and validation happens entirely in your browser using JavaScript. No data is sent to any server, making it safe for sensitive configuration files, API keys, or proprietary data structures.
What is the maximum JSON size?
There is no hard limit. Since processing happens in your browser, it depends on your device memory. It handles JSON files of several megabytes without issues.
Can I use this to validate JSON schemas?
This tool validates JSON syntax (ensuring the data is well-formed JSON). It does not validate against a JSON Schema. For schema validation, you would need a dedicated JSON Schema validator.