I Built 199 Free Developer Tools in One Website — Here's What I Learned

Every developer has a bookmark folder full of random online tools. JSON formatters, base64 encoders, color pickers, regex testers — scattered across dozens of ad-heavy websites that take 5 seconds to load. I got tired of it. So I built FastDevKit — a single website with 199 free tools across 14 categories, supporting 4 languages, deployed for $0/month. Here's what I learned along the way. The Spark I was working on a side project and needed to quickly decode a JWT token. I opened the first Google result — a wall of ads, a cookie banner, and a loading spinner. For a tool that should be instant. That moment I thought: what if there was one clean, fast site with every small utility a developer needs? No login, no ads (at least not obnoxious ones), no nonsense. Two weeks later, FastDevKit had 157 tools. A few weeks after that, 199. Lesson 1: Next.js 14 Static Export Is Underrated I chose Next.js with full static export ( output: 'export' ). No server components, no API routes, no serverles