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JSON Formatter
Format, validate, and minify JSON online. Instant syntax error detection with line numbers.
json formatter
json validator
json minifier
json beautifier
format json
Indent:
Input JSON
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Frequently Asked Questions
What is JSON formatting?
JSON formatting (beautifying) adds proper indentation and line breaks to make raw JSON human-readable.
Does this work offline?
Yes! All JSON processing happens entirely in your browser — no internet required.
What's the maximum JSON size supported?
The tool can handle JSON files up to several MB in modern browsers, limited only by browser memory.