JSON Formatter

What is JSON Formatter?

JSON Formatter takes raw or minified JSON and indents it so you can read it, or compacts it into a single line to save space. It also validates JSON syntax and shows errors with line numbers, which helps when debugging APIs or inspecting data.

How to use

1. Step 1 — Paste your JSON string into the input area. Syntax errors show up highlighted as you type.
2. Step 2 — Choose your indent size (2 or 4 spaces, or tabs) and click Format to pretty-print, or Minify to compress to a single line.
3. Step 3 — Copy the formatted output or download it as a .json file. Toggle tree view to browse nested keys and values.

Result

An API returns a minified 500-line JSON response. Paste it in, select 2-space indent, and you'll see the nested structure with collapsible sections. Find the 'user.preferences.notifications' path in seconds.

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