$ about
DevSecDeck is a collection of developer and security tools designed to keep your data private. Client-side processing is used wherever possible — no tracking, no data collection.
Privacy First
Every tool processes data client-side. Your input never leaves your machine. No analytics, no cookies, no telemetry.
Fast and Offline-Ready
Tools load instantly with code-splitting. Once loaded, most work without further network requests. No API calls for core functionality.
Open and Extensible
Built with Next.js, Shadcn UI, and TypeScript. Adding a new tool is as simple as creating a component and registering it.
// How it works
Each tool is a self-contained React component that takes user input and produces output using browser APIs like the Web Crypto API, TextEncoder/Decoder, and the Clipboard API. No external services are involved.
The only exception is the SSL Certificate Inspector's URL lookup mode, which uses a minimal server-side route to establish a TLS connection and retrieve the certificate — the certificate data is returned to your browser for client-side parsing.