JSON Formatter Pro - Viewer with a Collapsible Tree

JSON Formatter Pro automatically detects and formats JSON in your browser. Open any URL that returns JSON or an API response, and it instantly transforms raw JSON into a clean, syntax-highlighted, collapsible tree view — no copy-pasting into web tools needed. FORMATTING & VALIDATION: • Auto-Detection — Automatically detects and formats JSON responses and .json files • JSON Beautifier — Pretty-print minified JSON with proper indentation • JSON Validator — Catch syntax errors with clear, actionable error messages • Raw & Parsed Toggle — Switch between raw JSON text and formatted tree view instantly DEVELOPER TOOLS: • Syntax Highlighting — Color-coded keys, strings, numbers, booleans, and null values • Collapsible Tree View — Expand and collapse any node to navigate large JSON documents • Clickable URLs — Links in JSON values are automatically clickable • Dark Mode — True dark theme designed for long coding sessions • Copy to Clipboard — Copy any node or the entire formatted JSON with one click Runs 100% in your browser. No external servers, no data collection, no tracking, no ads. Fully open-source.