For AI
quicktype
Turn an API JSON example into types for your code
BrowserFree web tool and CLI · inferred types need review
Open quicktype Why this one
Give a coding assistant a concrete shape for an API response instead of asking it to guess field names. Generate types from representative JSON, then check the nullable and optional fields.
Try this first
Paste a redacted JSON example, choose TypeScript and inspect the generated types. Try another response containing missing or null fields before copying the result into your project.
How it helps your AI
Give the assistant the reviewed types, a redacted example and the actual API documentation so it does not invent response fields.