Picsova

JSON Formatter

Format messy JSON with proper indentation, minify it for production, and catch syntax errors with clear messages. Runs entirely in your browser.

Runs entirely in your browser. Nothing is uploaded.

Beautify, minify & validate JSON

A minified API response is unreadable, and a JSON file with one missing comma fails with an error that points at the wrong place. This tool does both jobs: it pretty-prints JSON with proper indentation so you can actually read the structure, and it validates as you go, reporting where the syntax breaks. Because it all runs in the page, you can paste a real response containing tokens or customer data without sending it anywhere.

How to format and validate JSON

  1. 1

    Paste your JSON

    Drop in a minified response, a config file, or a hand-written fragment.

  2. 2

    Format or minify

    Beautify it with indentation to read the structure, or minify it down to the smallest valid form.

  3. 3

    Fix what is flagged

    Invalid JSON produces a clear error message so you can find the broken syntax.

Good to know

  • Validation catches the usual suspects: trailing commas, single quotes instead of double, unquoted keys, and unbalanced brackets.
  • Minifying strips every unnecessary space and newline, which is what you want in a request body or a production bundle.
  • JSON has no comment syntax, so a `//` line from a config file will always be reported as invalid.
  • Nothing is uploaded, which is what makes this safe for responses containing API keys or personal data.

What people use it for

  • Making a minified API response readable while debugging
  • Finding the exact syntax error in a config file that will not parse
  • Minifying a JSON payload before pasting it into a request

Frequently asked questions

What's the difference between beautify and minify?+

Beautify adds indentation and line breaks for readability; minify strips all whitespace to make the smallest possible JSON for production.

Will it tell me where my JSON is broken?+

Yes: if parsing fails, you'll see the parser's error message describing the problem.

Is my data sent to a server?+

No. Formatting JSON happens entirely in your browser using built-in web APIs. Nothing is uploaded, stored, or logged.

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