About Kappafy

Kappafy is a free, browser-based JSON explorer and mock API generator built for frontend developers, backend engineers, and anyone who works with JSON data regularly. It turns raw JSON into a visual, interactive experience.

Features

• Paste and validate JSON with helpful error messages
• Collapsible tree view with data types shown for every node
• Click any node to see its JSONPath (e.g., $.data.users[0].name)
• Statistics: total keys, max depth, array lengths, data type distribution
• Mock API endpoint generation — creates REST patterns from your data
• Prettify and minify toggles
• Copy formatted JSON to clipboard

Use Cases

Kappafy is especially useful when you need to:

• Explore large API responses to understand their structure
• Find the correct JSONPath for data extraction in code
• Generate mock data for frontend development before the backend is ready
• Debug malformed JSON payloads with clear error messages
• Quickly format or minify JSON for documentation or testing

Part of the zovo.one Ecosystem

Kappafy is built by zovo.one. Check out our other developer tools:

• Lochbot — Chatbot response tester
• InvokeBot — Webhook and HTTP request builder
• ClaudHQ — AI development hub

Privacy

Everything runs in your browser. Your JSON data is never sent to any server. No tracking, no data collection, no account required.