DevPayload Pro

High-performance API JSON payload flattener, virtualized viewer, and Excel/CSV exporter.

Tired of pasting complex API JSON into fragile online formatters that leak sensitive customer data to unknown servers? DevPayload Pro is the zero-trust, air-gapped JSON visualizer and spreadsheet exporter built specifically for software engineers, QA leads, and product teams. 🚀 CORE FEATURES: • 1-Click Gesture Ingestion: Click "Paste from Clipboard" to safely parse multi-megabyte API payloads without permission prompts or browser freezes. • Recursive Unnesting Engine: Automatically transforms deep object structures (e.g., user.billing.address.city) into flat, sortable columns. • Superset Schema Scanner: Evaluates sparse or uneven JSON arrays to ensure no missing keys break column alignment. • 60fps Virtualized Grid: Powered by TanStack Table. Scroll through 10,000+ records with zero UI lag. • Sub-Payload Inspection: Nested object arrays format cleanly as count chips ("3 items") with 1-click raw modal inspection. • Enterprise Spreadsheet Export: Generate formatted Excel (.xlsx) workbooks with styled headers and auto-sized columns, plus RFC 4180-compliant CSV. • 100% Local & Air-Gapped: All parsing, unnesting, and file generation runs entirely inside your browser's memory. Zero telemetry. Zero remote servers. 🛡️ PRIVACY GUARANTEE: DevPayload Pro requires zero host permissions (<all_urls> is never requested). Your confidential API data, tokens, and customer records never leave your machine. ⭐ FREE TIER: Export up to 100 rows completely free, forever. Unlock unlimited row exports with our limited 75-seat Founders Lifetime License!