We built 1,680+ free browser tools — no signup, no downloads, 100% private

Hey IH! 👋

We're Teamz Lab. We build free browser-based tools as a bootstrapped side project, funded entirely by ads.

The site now has 1,680+ tools across 40+ categories. Everything runs client-side — your data never leaves your browser.

Some categories people use most:

💰 Finance — mortgage calculator, budget planner, debt payoff, compound interest, tax calculators for 20+ countries

🏥 Health — BMI, calorie calculator, sleep calculator, burnout test, reaction time test

👨‍💻 Developer — JSON formatter, regex tester, JWT decoder, cron generator, Base64 encoder

🎨 Design — background remover, image compressor, favicon generator, meme maker

🏠 Housing — kitchen remodel calculator, paint calculator, solar panel ROI, electricity cost

How we make money: AdSense. No premium tier, no paywall, no email gates. Everything is free forever.

Tech stack: Static HTML/CSS/JS on GitHub Pages. No backend. AI tools use Chrome AI + Transformers.js (also client-side).

Monthly revenue: still early — growing traffic organically through SEO.

Would love your feedback — what tools would you add to the collection?