What does it actually take to build a working biodata maker from scratch? In this episode, I break down the engineering behind Marriage Biodata Hub — a Next.js project where users fill out a wedding biodata form entirely in their browser, with no server ever touching their personal details. I cover how the biodata maker keeps data stored locally on the user's own device, and how it turns a finished wedding biodata into a downloadable PDF using html2canvas and jsPDF. This one's a behind-the-scenes look at the real code decisions that shape a privacy-first biodata maker.