About sitekits.dev

sitekits.dev is a growing collection of free, precise tools for developers, SREs, and security engineers — the people who build and operate the web.

Principles

• Local-first. 67 of our tools run entirely in your browser. Your input never leaves your device.
• No tracking by default. We use cookieless analytics. Optional Google services load only after you consent.
• Fast & static. Every page is pre-rendered and served from Cloudflare's edge.
• Documented. Every network request a tool makes is disclosed on its page and in our privacy policy.

How it's built

Astro (static site generation) with React islands for interactivity, and a Cloudflare Workers API for the few tools that need a server. Open, dependency-light, and built to last.