ToolboxDevs

Free Online Developer Tools

Format and validate your JSON and XML instantly — entirely in your browser, with no data sent to any server.

What Is a JSON Formatter?

JSON (JavaScript Object Notation) is a lightweight, text-based data-interchange format widely used in web APIs, configuration files, and databases. It represents data as key-value pairs, arrays, strings, numbers, booleans, and null values. While JSON is easy for machines to parse, raw JSON from APIs is often delivered as a single compressed line with no whitespace — making it nearly impossible for humans to read at a glance.

Why Format Your JSON?

A JSON formatter (also called a JSON beautifier) adds consistent indentation and line breaks, transforming a dense, minified blob into a structured, readable document. This is essential during debugging, API exploration, and code review. Our formatter uses 2-space indentation and validates your JSON simultaneously — if there is a syntax error, you will see an exact error message pointing to the problem.

What Is an XML Formatter?

XML (Extensible Markup Language) is a markup language that defines rules for encoding documents in a human-readable and machine-readable format. It is used in configuration files (like Maven's pom.xml), data exchange (SOAP APIs, RSS feeds), and document formats (DOCX, SVG). Like JSON, XML is frequently transmitted in compact form to reduce bandwidth, making it difficult to read without formatting.

How to Use This Tool

  1. Select the JSON Formatter or XML Formatter tab at the top.
  2. Paste your raw or minified code into the Input box on the left.
  3. Click Format / Beautify to add indentation and line breaks, or Minify to compress it into a single line.
  4. If there is a syntax error, an error message will appear below the buttons — no page reload needed.
  5. Click Copy Output to copy the result directly to your clipboard.

Privacy & Security

All processing happens entirely inside your web browser using native JavaScript APIs (JSON.parse, DOMParser). No data is ever sent to any server. Your JSON and XML stay completely private. This also means the tool works offline once the page is loaded.