DEV Community

Shishir Rahman
Shishir Rahman

Posted on

I built 100+ free client-side developer tools — here's what I learned after 2 weeks

The Problem

Every time I needed to decode a JWT or generate a bcrypt hash,
I had to use ad-heavy websites that might be logging my input.

I couldn't find a single clean, trustworthy, all-in-one toolkit.
So I built one.

What I Built

Bizmatepro (https://www.bizmatepro.xyz/) is a free,
privacy-first toolkit with 100+ utilities for developers,
marketers, and security professionals.

The Core Rule

Everything runs client-side. No exceptions for sensitive tools.

Open DevTools → Network tab while using the JWT decoder
or password generator. Zero outbound requests.

Tech Stack

  • Plain HTML/CSS/JS (no heavy frameworks)
  • Cloudflare for edge caching and security
  • Render for hosting
  • Google APIs for DNS/IP lookups
  • No database whatsoever

What's Inside

Security tools

  • Password generator (offline)
  • JWT decoder (offline)
  • Bcrypt/HMAC/hash generators
  • CC validator (Luhn algorithm)

Developer utilities

  • JSON/XML formatter and validator
  • Regex tester
  • SQL formatter
  • Base64, URL encoder, hex tools

Network & SEO

  • DNS lookup
  • SSL checker
  • Meta tag analyzer
  • SERP simulator

Business tools

  • Invoice generator → PDF
  • Quote builder → PDF
  • Receipt maker → PDF

100+ tools total across 10 categories.

Business Model

No ads. No VC money. Donations only.

Controversial? Maybe. But I wanted to prove that
a useful product doesn't need to monetize its users.

2 Weeks In — Honest Numbers

  • 56 total users
  • 1.7K events
  • Traffic from: USA, Indonesia, Germany, Bangladesh, UK
  • Donations: $0 so far 😅

What I Learned

  1. Building is the easy part. Distribution is everything.
  2. "Privacy-first" is a feature, not just a tagline.
  3. The developer community is incredibly skeptical (rightfully so) about client-side claims.
  4. Reddit and HN are brutal but honest.

What's Next

  • Open sourcing the codebase
  • Adding more AI-powered tools
  • Building a proper API for developers

Feedback Welcome

What tools are you missing?
What's broken?
What would make you actually bookmark this?

Try it: https://www.bizmatepro.xyz/

Top comments (0)