The latest articles on DEV Community by Shishir Rahman (@shishir_rahman_37d22c7a66). https://dev.to/shishir_rahman_37d22c7a66 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3959174%2F4e4fc044-4f4e-4f42-b899-8eab980dbcbe.jpg https://dev.to/shishir_rahman_37d22c7a66 en Shishir Rahman Fri, 29 May 2026 23:46:48 +0000 https://dev.to/shishir_rahman_37d22c7a66/i-built-100-free-client-side-developer-tools-heres-what-i-learned-after-2-weeks-2m8j https://dev.to/shishir_rahman_37d22c7a66/i-built-100-free-client-side-developer-tools-heres-what-i-learned-after-2-weeks-2m8j <h2> The Problem </h2> <p>Every time I needed to decode a JWT or generate a bcrypt hash, <br> I had to use ad-heavy websites that might be logging my input.</p> <p>I couldn't find a single clean, trustworthy, all-in-one toolkit.<br> So I built one.</p> <h2> What I Built </h2> <p>Bizmatepro (<a href="https://www.bizmatepro.xyz/" rel="noopener noreferrer">https://www.bizmatepro.xyz/</a>) is a free, <br> privacy-first toolkit with 100+ utilities for developers, <br> marketers, and security professionals.</p> <h2> The Core Rule </h2> <p>Everything runs client-side. No exceptions for sensitive tools.</p> <p>Open DevTools → Network tab while using the JWT decoder <br> or password generator. Zero outbound requests.</p> <h2> Tech Stack </h2> <ul> <li>Plain HTML/CSS/JS (no heavy frameworks)</li> <li>Cloudflare for edge caching and security</li> <li>Render for hosting</li> <li>Google APIs for DNS/IP lookups</li> <li>No database whatsoever</li> </ul> <h2> What's Inside </h2> <p><strong>Security tools</strong></p> <ul> <li>Password generator (offline)</li> <li>JWT decoder (offline)</li> <li>Bcrypt/HMAC/hash generators</li> <li>CC validator (Luhn algorithm)</li> </ul> <p><strong>Developer utilities</strong></p> <ul> <li>JSON/XML formatter and validator</li> <li>Regex tester</li> <li>SQL formatter</li> <li>Base64, URL encoder, hex tools</li> </ul> <p><strong>Network &amp; SEO</strong></p> <ul> <li>DNS lookup</li> <li>SSL checker</li> <li>Meta tag analyzer</li> <li>SERP simulator</li> </ul> <p><strong>Business tools</strong></p> <ul> <li>Invoice generator → PDF</li> <li>Quote builder → PDF</li> <li>Receipt maker → PDF</li> </ul> <p><strong>100+ tools total across 10 categories.</strong></p> <h2> Business Model </h2> <p>No ads. No VC money. Donations only.</p> <p>Controversial? Maybe. But I wanted to prove that <br> a useful product doesn't need to monetize its users.</p> <h2> 2 Weeks In — Honest Numbers </h2> <ul> <li>56 total users</li> <li>1.7K events</li> <li>Traffic from: USA, Indonesia, Germany, Bangladesh, UK</li> <li>Donations: $0 so far 😅</li> </ul> <h2> What I Learned </h2> <ol> <li>Building is the easy part. Distribution is everything.</li> <li>"Privacy-first" is a feature, not just a tagline.</li> <li>The developer community is incredibly skeptical (rightfully so) about client-side claims.</li> <li>Reddit and HN are brutal but honest.</li> </ol> <h2> What's Next </h2> <ul> <li>Open sourcing the codebase</li> <li>Adding more AI-powered tools</li> <li>Building a proper API for developers</li> </ul> <h2> Feedback Welcome </h2> <p>What tools are you missing?<br> What's broken?<br> What would make you actually bookmark this?</p> <p>Try it: <a href="https://www.bizmatepro.xyz/" rel="noopener noreferrer">https://www.bizmatepro.xyz/</a></p> privacy showdev sideprojects tooling