Developer Toolkit: JSON, JWT, Regex & More

Fast, private developer tools for the work you do every day. All local, always growing.

Your browser is your workspace. Your developer tools should be too. Let's be honest: juggling a dozen different utility websites is a pain. They're slow, they're plastered with ads, and when you're pasting a JWT, an API key, or a private snippet of code, you never really know who is logging it. Developer Toolkit fixes that. It's a growing collection of the essential tools developers actually use, wrapped in one fast, modern, and completely private package. Why developers keep it pinned: Truly 100% local. Every tool runs entirely in your browser. No backend, no tracking, no network requests. Your data never leaves your machine. Period. A native app feel. Forget clunky popups. The toolkit opens in a sleek, resizable window that behaves like a real desktop app. Built for speed. Pin your favorites, jump back into recent tools, and move between utilities instantly with a keyboard first command palette. Always growing. New tools, refinements, and quality of life improvements ship regularly. The same privacy first philosophy, just more of it. Beautifully designed. A clean, distraction free interface with full Light and Dark mode support. What's inside: A curated set of utilities covering the things developers reach for every day. Formatting and validating structured data, decoding tokens, encoding and converting values, generating secure identifiers and passwords, inspecting text, testing regular expressions, comparing changes, converting timestamps, exploring color, hashing, and looking things up on the fly. If it's a small task you'd normally open a browser tab for, it probably already lives here, or it's on the way. Your data stays yours. Whether you're working with private API responses, sensitive tokens, or internal code, Developer Toolkit is a safe space for it. No intrusive permissions. No analytics. No server to store anything on, because there isn't one. Install Developer Toolkit, streamline your workflow, and stop trusting ad filled utility sites with your code.