I built 130+ free browser tools in 2 weeks — here's what I learned

Hey IH! I'm Pranjal, a cloud security engineer who got frustrated with free tools that require sign-up, upload your files to unknown servers, or hit you with daily limits after 2 uses.
So I built CrispToolHub — 130+ free browser-based tools across 16 categories.

What makes it different:
→ Everything runs client-side (WebAssembly + vanilla JS). No uploads.
→ No account needed for anything
→ No daily limits on core tools
→ Privacy-first by design (I'm a security engineer by profession)

What's inside:
📄 PDF toolkit (compress, merge, split, convert — files stay on your device)
📝 AI resume builder + ATS checker
💰 India financial calculators (GST 2.0, PPF, FD, NPS, HRA, gratuity)
❤️ Health tools (BMI, sleep cycles, calories, running pace)
🎓 Education (CGPA all Indian universities)
💕 Fun tools (love calculator, numerology)
🧾 Business (invoice generator with GST)
👨‍💻 Developer tools (JSON, Base64, QR code)

Tech stack:
→ AstroJS v6 (MPA, zero JS overhead)
→ Tailwind CSS v4
→ Cloudflare Pages (free tier)
→ Gemini API via Cloudflare Workers
→ WebAssembly for PDF/image processing

Current traction (2 weeks live):
→ ~850 daily users
→ 60% US traffic
→ 187 pages indexed
→ AdSense under review
→ 4 ad networks applied

Biggest challenges so far:
1. PDF processing in browser without uploads (solved with pdf-lib + WASM)
2. Keeping Lighthouse 95+ while AdSense script adds 270KB
3. GST 2.0 rates changed September 2025 — had to verify and update all calculator logic

Happy to answer questions about:
→ AstroJS MPA architecture
→ Cloudflare Workers + Gemini setup
→ Browser-based file processing
→ India-focused SEO strategy

Link: https://crisptoolhub.com

What tools would you add next?