JSON / XML Formatter

Format and highlight JSON and XML

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.