Question 1

What is a JSON formatter?

Accepted Answer

A JSON formatter (also called a JSON pretty-printer) takes compact or minified JSON and adds indentation and line breaks to make it human-readable. It works by parsing the JSON structure and re-emitting it with consistent whitespace — two or four spaces per nesting level, or tabs — without changing any of the actual data. Beyond indentation, most formatters validate the syntax as they parse: malformed input such as a missing comma, an unclosed bracket, or a trailing comma is flagged with an error. TOOlover's formatter also supports sorting object keys alphabetically and stripping trailing commas. Because formatting runs entirely in your browser, there is no file size limit and your data never leaves your device. The result is a file you can read, diff, and review more easily, which is why pretty-printing is a standard step before committing configuration or debugging an API response.

Question 2

Is my JSON data sent to a server?

Accepted Answer

No. TOOlover processes all JSON entirely in your browser using JavaScript. Your data never leaves your device.

Question 3

What indentation options are available?

Accepted Answer

You can choose 2-space, 4-space, or tab indentation. The formatter also supports sorting keys alphabetically and removing trailing commas.

Question 4

Can I format large JSON files?

Accepted Answer

Yes. Since formatting happens in your browser, there is no file size limit imposed by the server. Performance depends on your device.

JSON Formatter

JSON Formatter

How to use

Features