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JSON Formatter & Validator
Format, validate, and beautify JSON data instantly.
How to Use
Paste your JSON into the input area. Click 'Format' to pretty-print it with 2-space indentation, 'Minify' to compress it, or 'Validate' to check syntax. The formatted result appears in the output area. Use 'Copy' to copy the result and 'Clear' to start over. All processing is local.
Why Use This Tool
Working with JSON is a daily task for developers. Whether you're debugging API responses, editing config files, or preparing data, having a fast formatter and validator saves time. Unlike online tools that send your data to servers, this runs entirely in your browser.
Frequently Asked Questions
No. All parsing and formatting happens locally in your browser using JavaScript's built-in JSON methods.
Minify removes all whitespace and newlines from JSON, producing the smallest possible valid JSON string.
Common issues: trailing commas, single quotes instead of double quotes, unquoted keys, or missing brackets. The error message shows the position.