JSON Formatter

What is JSON Formatter?

JSON (JavaScript Object Notation) is the most common format for web APIs and configuration files, but it is often minified into a single hard-to-read line. This JSON formatter re-indents your data into a clean tree, minifies it back to a compact string, and validates the syntax so you can spot a missing comma or trailing brace instantly.

How to use

1. Paste your JSON into the input pane.
2. Click Format to pretty-print it with readable indentation, or Minify to compress it to one line.
3. Click Validate to check whether the JSON is syntactically valid.
4. Copy the result from the output pane.

Use Cases

• Reading minified API responses returned by a backend or a third-party service.
• Catching syntax errors in hand-edited configuration files.
• Compressing JSON before pasting it into a request body or a database field.
• Comparing a payload's structure while debugging a client-server contract.