{ } JSON Formatter
prettify · validate · minify · highlight
Paste your JSON data below to format, validate or minify it instantly. This tool runs entirely in your browser — your data never leaves your machine.
INPUT
OUTPUT
FAQ
What does this JSON formatter do?
It parses your JSON input and re-formats it with proper indentation (prettify), removes whitespace (minify), or checks if it's valid JSON (validate). Output includes syntax highlighting for keys, strings, numbers, booleans, and null values.
Is my data safe?
Yes. All processing happens locally in your browser using JavaScript. No data is sent to any server. Your JSON stays on your machine.
What JSON features are supported?
This tool supports standard JSON as defined by RFC 8259. It handles nested objects, arrays, strings with escape sequences, numbers, booleans, and null. It does not support JSON5, comments, or trailing commas.