Developer Tools

About Developer Tools

Developer tools on useTool are built for the tasks that come up constantly in a software workflow — formatting API responses, decoding tokens, testing patterns, and encoding data for transmission. Every tool runs directly in your browser, so there's no server receiving your code, credentials, or payload data. This matters when working with JWTs that contain user claims, JSON payloads from internal APIs, or regex patterns you're building for a client project.

The tools in this category complement each other naturally. A JSON formatter helps you read a payload cleanly before inspecting the encoded fields inside it with the Base64 or URL decoder. A JWT decoder reveals the claims structure, which you can then format as JSON for easier reading. Regex patterns you build here can be validated against the exact kind of input your application receives before you ship.