JSON Formatter

What JSON Formatter is

JSON Formatter is a web tool for formatting, checking, and minifying JSON. It can report syntax errors by line and column, and lets you choose indentation with two, three, or four spaces, or tabs. Validation supports RFC 8259, RFC 7159, RFC 4627, and ECMA-404. A repair feature handles common problems such as single quotes, unquoted keys, trailing commas, comments, and Python-style True or None values. You can use JSONPath to select fields, or paste curl and wget commands to extract JSON bodies supplied with -d, --data, or --json. Formatting, validation, minification, and filtering run in the browser; the site says JSON is not uploaded, stored, or logged. Share links contain the JSON in the link itself. Other listed features include dark mode, drag-and-drop upload, downloads, autosave, and search. The service is free, with no sign-up or hard file-size limit, though practical capacity depends on your machine.

Who it suits

It suits people who need to read or debug minified API and log JSON, or check syntax before production. It is web-only and runs those operations in the browser.

Limits

There is no hard file size limit, but practical capacity depends on the user’s machine. The site says documents in the tens of megabytes work in modern browsers.

Getting started

1. Open the JSON Formatter website
2. Paste JSON, or drag and drop a file
3. Choose an indentation style if formatting
4. Use Ctrl+Enter, or Cmd+Enter on Mac, to format the input

Verdict

JSON Formatter combines everyday formatting and validation with repair, JSONPath filtering, and command-body extraction. Its in-browser processing and share links that carry the JSON may suit users who want to avoid server-side storage, while larger documents depend on the capacity of their machine.