JSON Beautifier — Pretty Print JSON

Beautify minified JSON in one click

Most JSON you will encounter in the wild is minified. APIs squeeze every byte they can — no whitespace, no new lines, no comments — so the response is as small as possible on the wire. That makes sense for transport, but it makes the JSON unreadable when you are trying to debug a response or inspect a payload. The beautifier takes minified JSON and re-adds the indentation and new lines that the original author would have used if they were writing it by hand.

Pick your indentation from the toolbar. Two spaces is the default in modern JavaScript projects and is what Prettier produces. Four spaces is the convention in many Java and Python shops. Tab indentation is also supported if that is what your team uses. Whatever you pick, the result is fully valid JSON — the whitespace characters are insignificant to the parser, only the structure matters.

Beautifying does not change your data

The beautifier parses your input into an in-memory object and then serializes it back out with the indentation you chose. That round-trip preserves every value exactly: numbers stay numbers, strings stay strings, key order is preserved. The only thing that changes is the whitespace between tokens. You can safely paste the output back into your application — it will produce the same object as the input.

When to beautify, when to minify

Beautify when you are reading. Minify when you are shipping. The two operations are inverses of each other: beautifying a minified file produces the readable form, and minifying a beautified file produces the compact form. Most teams keep both versions of a long config file — the beautified one is committed to source control, the minified one is generated at build time and shipped to production.

If you want to inspect a deeply nested JSON document, the JSON Tree Viewer is a better choice than the beautifier. The beautifier produces flat text that you still have to scroll through; the tree viewer lets you collapse entire sections you do not care about and stay oriented even with very large documents.

Indentation style is a team decision

There is no universally correct indentation for JSON. The JSON spec itself is silent on the matter — whitespace between tokens is insignificant, so you can use any indentation you like. The right answer for your project is whatever your team's style guide says. If you do not have one, two spaces is the most common choice in JavaScript and TypeScript codebases, and it is the default that tools like Prettier and ESLint produce.