JSON Formatter
Free online JSON validator, beautifier (pretty print) and minifier.
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What Does This JSON Formatter Do?
Paste any JSON and this tool will validate it (telling you exactly where an error is), beautify it (2-space indentation for readability) or minify it (strip all whitespace into a single line). Useful when inspecting API responses, editing configuration files or debugging.
Your data is processed locally with your browser's JSON.parse engine and never sent to a server — so it is safe to format JSON containing API keys or personal data.
Frequently Asked Questions
How do I check if my JSON is valid?
Paste your JSON into the input box and press Beautify. If the data is valid you will see a "Valid JSON" confirmation; otherwise an error message shows the type and position (line/column) of the problem.
What is the difference between pretty print and minify?
Pretty print adds indentation and line breaks so humans can read the JSON. Minify removes all unnecessary whitespace, producing a single line — smaller to store and faster to transfer.
Is it safe to paste sensitive JSON here?
Yes. Formatting happens entirely in your browser with JavaScript; your data is never sent to a server or stored. Closing the page destroys it completely.
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JSON Formatter