JSON Formatter & Validator
Format, validate, and minify JSON instantly. Nothing ever leaves your browser.
This tool runs entirely in your browser. No data is ever sent to any server.
JSON Formatting FAQ
What is JSON formatting?
JSON formatting (pretty-printing) adds consistent indentation and line breaks to make JSON data human-readable. It does not change the data itself — only its visual presentation.
What indentation should I use?
Most projects use 2 or 4 spaces. 2 spaces is common in JavaScript/TypeScript ecosystems (Node.js, ESLint defaults). 4 spaces is common in Python and Java projects. Tabs are also valid but less common in JSON.
Does formatting change my data?
No. Formatting only affects whitespace and line breaks. The parsed values, keys, arrays, and objects remain identical. You can verify by minifying the output — it will match the original data.
What does "Sort Keys" do?
Sort Keys alphabetically orders all object keys at every level of nesting. This is useful for comparing two JSON objects, generating deterministic output, or making configuration files easier to scan.
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