JSON Formatter & Validator
Paste or type JSON below. Format it with proper indentation, minify it for compact storage, or validate its structure — all in real time.
Invalid JSON
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About this tool
The JSON Formatter & Validator is a dual-purpose tool that helps you work with JSON data more efficiently. Paste any JSON string into the input area and instantly see key metrics — the number of keys, lines, and total characters. Use the Format button to pretty-print your JSON with proper indentation for readability, or Minify to collapse it into a compact single line for storage or transmission. If your JSON contains a syntax error, the tool highlights the exact location of the problem so you can fix it quickly. All processing happens in your browser — nothing is uploaded to any server, and no data is retained after you close the tab.