This is a free, real-time JSON formatter and validator that runs 100% in your browser. No data is sent to any server. It supports formatting (beautifying), minifying, sorting keys alphabetically, and real-time validation with line-accurate error messages.
JSON.parse() converts your text into an in-memory JavaScript object, then JSON.stringify() renders it back with proper indentation. This also validates the JSON as a side effect " any syntax errors are caught and displayed with the exact character position.
All processing is done entirely in your browser's memory using JavaScript. No data is sent to any server. When you close this tab, the data is gone. This makes it safe to use with API keys, tokens, or private configuration files.
It recursively sorts all object keys alphabetically throughout the entire JSON structure. Useful for comparing two JSON objects for differences or enforcing consistent key ordering in config files.
Minifying removes all whitespace, newlines, and indentation from valid JSON. The result is functionally identical but smaller " useful for reducing payload size in HTTP API responses or configuration files.
Beautify ugly, minified, or poorly formatted JSON into clean, readable output with adjustable indentation.
JSON beautification transforms compact or inconsistently formatted JSON into clean, uniformly indented output. Unlike basic formatting, beautification ensures every level of the structure follows exactly the same indentation rules.
The tool uses JSON.stringify(data, null, indent) which produces standards-compliant beautified output. Every opening brace starts a new indentation level, every closing brace returns to the previous level, and array items are individually lined.
Beautified JSON is the standard format for configuration files, API documentation examples, and any JSON that humans need to read and edit.
When beautified JSON makes a difference:
Yes. Beautifying, formatting, and prettifying JSON all refer to the same operation: adding consistent indentation and line breaks to make JSON human-readable.
No. Only whitespace is added. All keys, values, arrays, and objects remain unchanged. The beautified and minified versions produce identical results when parsed.