Why it is private
Everything happens in your browser, so your JSON never needs to leave the page or touch server memory.
JSON Formatter
Paste JSON, validate it, pretty-print it, minify it, and copy the result. This tool runs entirely in your browser, so nothing is uploaded or stored in server memory.
Validation
Waiting for input
Root type
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Input size
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Output size
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Output actions
Validate, format, copy, download, or reload example data from one consistent result area.
What it helps with
- Finding syntax mistakes quickly.
- Making nested data readable.
- Creating compact JSON for APIs or configs.
How validation works
The validator checks whether the text is valid JSON and tells you what kind of root value it contains, such as an object or array.