PayloadPeek

Instantly format JSON, generate TypeScript interfaces, and infer SQL schemas - all in one click.

PayloadPeek is a developer tool that transforms raw JSON into something actually useful — instantly. CORE FEATURES 🔍 JSON Formatter Paste any JSON and see a beautiful, syntax-highlighted, collapsible tree. Click any node to expand or collapse it. Collapsed nodes show a preview so you always know what's inside. 📐 TypeScript Interface Generator Paste an API response and get a ready-to-use TypeScript interface in one click. Handles nested objects, arrays, nullable fields, and optional properties automatically. 🗃️ SQL Schema Generator Infers a CREATE TABLE statement from your JSON structure. Detects timestamps, maps types correctly, and suggests child tables for arrays. 🔎 Search (Ctrl+F) Find any key or value instantly with match count and next/previous navigation. 📋 Copy Anything Click any value to copy it. Hover any object or array node to copy that entire node as formatted JSON. ↗️ Full Tab Mode Open PayloadPeek in a full browser tab for large JSON files. Content transfers automatically. 🌐 Auto-detect JSON Pages Visit any URL that returns raw JSON — PayloadPeek automatically replaces the browser's default view with the full interactive tree. 🌙 Dark / Light Mode Follows your system preference by default. Toggle anytime. PRIVACY All processing is 100% local. No data ever leaves your browser. No analytics, no tracking, no servers. Built by ShipNano — small tools. shipped.