Overview

A tool for pretty-printing (beautifying) or compressing (minifying) JSON data. Useful for JSON validation, debugging, and inspecting API responses.

Formula

Formatting algorithm: Parse the JSON string into an abstract syntax tree (AST), then recursively traverse it, applying indentation (2 or 4 spaces/tab) during serialization. Minify removes all unnecessary whitespace, line breaks, and indentation. Validation detects syntax errors per the JSON specification (RFC 8259) and shows the error location.

How to Use

1. 1Paste JSON text into the input field.
2. 2Click the Beautify or Minify button.
3. 3Choose indentation size (2 spaces, 4 spaces, or tab).
4. 4Copy the formatted result.

Tips

• ✔If you enter invalid JSON, the error location and message will be shown.
• ✔Using a formatter when debugging API responses helps you quickly understand the structure.
• ✔Minified JSON saves bandwidth during network transmission.
• ✔Comments (// or /**/) are not part of the JSON standard and will cause parse errors.
• ✔Sorting keys alphabetically makes JSON comparison easier.

FAQ