I Built 1,700+ Free Browser Tools in 2 Weeks — Here's What Actually Works

Two weeks ago, I launched tool.teamzlab.com with 1,700+ browser-based tools. No backend. No signups. No data collection. Everything runs client-side. Here's what happened, what I learned, and the tools people actually use. The stack Pure HTML/CSS/JS — no React, no Next.js, no build step GitHub Pages — free hosting, zero server costs CSS custom properties — one design system, dark/light mode across 1,700 pages Chrome AI + Transformers.js — AI features that run in the browser, no API keys Pre-commit hooks — auto-rebuild search index, sitemap, SEO validation on every commit Total monthly cost: $0 What surprised me Bing sends more traffic than Google. After 2 weeks, Bing organic is my #2 traffic source (530 sessions/week). Google is still warming up. If you're building tools, don't ignore Bing Webmaster Tools and IndexNow. People spend 3+ minutes on tools that generate something. My QR Card Generator averages 112 seconds per session. The Cheque Book Maker hits 151 seconds. Calculators get