How to Format JSON: A Step-by-Step Guide

Formatting JSON adds structure and indentation without touching the underlying data. Here's the full process, plus what to know about indentation choices.

Step-by-Step: Formatting Your JSON

1. Copy your JSON — minified, poorly indented, or otherwise hard to read.
2. Paste it into the formatter.
3. Review the formatted output — indentation and line breaks applied, structure now visible at a glance.
4. Copy or download the result for use wherever you need readable JSON.

A Note on Indentation Width

Common conventions use either 2 or 4 spaces per indentation level; some tools also support tabs. This is purely a readability preference — 2 spaces keeps deeply nested structures more compact on screen, while 4 spaces can make nesting levels easier to visually distinguish. Neither is more "correct"; pick whichever matches your team's existing style, if you have one.

Formatting Doesn't Change Your Data

It's worth being clear about what formatting does and doesn't do: it only adds or removes whitespace. The actual values, keys, and structure of your JSON stay completely identical — a formatted and an unformatted version of the same JSON will parse to the exact same object. If you need to actually modify values, that's a separate editing step, not something formatting does for you.