JSON / XML Formatter

About

A lightweight Chrome extension for formatting, highlighting, and comparing JSON and XML. No external dependencies — pure JS/CSS.
                                                                                                                                                                                                                   Features:                                                                                                                                                                                                                                                                                                                                                                                                                         • Format — structured output with indentation and syntax highlighting                                                                                                                                            • Minify — single line, no whitespace
  • JSON Tree Collapsing — expand/collapse objects and arrays with visual connectors
  • Compare Mode — side-by-side diff with LCS algorithm, highlights added/removed lines
  • Error Handling — pinpoints the exact error character with context and hints
  • Context Menu — select JSON/XML on any page, right-click → "Format in JSON/XML Formatter"
  • Auto-Formatting — automatically formats JSON/XML responses when opened in the browser
  • Save & Copy — save formatted output as .txt or copy to clipboard
  • Adjustable font size (A− / A+)
                                                                                                                                                                                                                   Works offline. No data collection. No third-party services.