JSON Formatter & Beautifier
Pretty-print and beautify JSON with your preferred indentation style.
Pretty-print and beautify JSON with your preferred indentation style.
A JSON formatter — also called a JSON beautifier or JSON pretty printer — takes compact, unindented JSON and reformats it with consistent indentation, making it easy to read and review. Developers use JSON formatters constantly: any time they receive a minified API response, a production config dump, or a copied snippet with inconsistent spacing.
RealJSON's free online JSON formatter runs entirely in your browser. Paste raw JSON, choose your indentation style, and get beautifully formatted output in milliseconds — no server, no account required.
Choose between 2-space, 4-space, or tab indentation. Many codebases have style guides that mandate one over the others. The formatter applies your preference consistently throughout the entire JSON document, from the first bracket to the last.
The formatter validates your JSON as it formats. If your JSON has a syntax error — a missing comma, an extra bracket, a single quote where a double quote belongs — it tells you the exact line and character position before attempting to format. This makes it a useful quick-check tool even when you only need validation.
Get your formatted JSON to the clipboard in one click, or download it as a .json file. Useful for saving formatted output to disk, pasting into a code editor, or including in PR comments and documentation.
"Pretty print JSON," "format JSON," and "beautify JSON" all mean the same thing: take minified or inconsistent JSON and output it in a human-readable form with proper indentation and line breaks. If you've ever received an API response that looks like {"id":1,"name":"Jane","roles":["admin","user"]} and struggled to read it, a JSON formatter is what you need.
You could use a JSON extension in your code editor, but an online JSON formatter is faster for one-off tasks. Paste, format, copy — done in under five seconds. No extension to install, no editor to open, and no learning curve. Since RealJSON runs entirely client-side, you can safely paste sensitive JSON like API responses, database exports, or config files without worrying about data leaving your machine.
After formatting, use the JSON Viewer to navigate the structure visually as a collapsible tree. Use the JSON Validator to confirm there are no syntax errors. If you need to reduce file size for production, the JSON Minifier is the reverse — stripping whitespace back out.
Browse all free JSON tools →
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