API Tools
Developer tools for working with APIs, OpenAPI specifications, JSONPath queries, request building and code generation.
Tools
Explore all available api tools.
JSON to TypeScript Interface
Generate TypeScript interfaces from JSON.
JSON to C# Class
Generate C# classes from JSON.
JSON to Go Struct
Generate Go structs from JSON.
JSON to Python Dataclass
Generate Python dataclasses from JSON.
OpenAPI Viewer
View and inspect OpenAPI specifications.
About API Tools
API tools help developers build, test, inspect and integrate APIs faster. Whether you are working with REST APIs, OpenAPI specifications, JSON responses or generated client code, these tools simplify common development tasks.
These tools are designed for developers, engineers and technical users who need fast, reliable and privacy-friendly utilities.
FAQ
Are API tools free to use?
Yes. All API tools are completely free and available directly in your browser.
Can I test real API responses?
Many API tools allow you to inspect, transform and validate API-related data such as JSON responses, OpenAPI documents and request payloads.
Is my API data uploaded anywhere?
No. Most API tools process data locally in your browser whenever possible.