How to Format JSON Online (Beautify, Minify and Sort Keys)

Working with raw, unformatted JSON is painful. A single minified line can hide structure, make debugging slow, and produce noisy version-control diffs. In this guide we'll walk through how to format JSON online quickly and safely — without sending your data to a server.

Why formatting matters

Readable JSON helps you:

• spot missing commas, brackets and quotes faster,
• understand nested structure at a glance,
• produce clean, reviewable diffs in pull requests.

Pretty-print with the right indentation

Use the JSON Formatter to beautify any document. You can choose between 2 spaces, 4 spaces or tabs depending on your team's style guide. Two spaces is the most common default for web projects.

Minify for production

When you ship JSON over the wire — API responses, config bundles — size matters. Minifying removes all insignificant whitespace, often shrinking payloads by 20–40%. The formatter's Minify action does this in one click.

Sort keys for stable diffs

If two systems serialize the same object with keys in a different order, your diffs become noisy. Sorting keys alphabetically makes documents canonical, so only real changes show up when you compare two JSON files.

Everything runs in your browser

The formatter is a pure client-side tool. Your JSON never leaves your machine, which makes it safe for sensitive payloads and instant to use.

Ready to try it? Open the JSON Formatter and paste your data.