Developer Guides

Developer

Developer Articles & Guides

Guides on web APIs, data formats, encoding, security, and developer tools. Written from hands-on experience building production applications with React, Next.js, and TypeScript.

Developer10 min

JSON for Developers: Complete Data Interchange Guide

Master JSON from its origin and philosophy to common mistakes, modern usage patterns, and JSON Schema validation.

Hanul LeeMar 11, 2026
Developer9 min

Base64 Encoding: A Complete Developer's Guide

Understand Base64 encoding from the ground up — binary-to-text conversion, Data URIs, JWT tokens, email attachments, and performance considerations.

Hanul LeeMar 16, 2026
Developer8 min

Text Case Conventions: A Developer & Writer's Guide

Master text case conventions — camelCase, snake_case, kebab-case for code, and Title Case vs Sentence case for writing and UI design.

Hanul LeeMar 16, 2026
Developer8 min

YouTube Embedding: Complete Guide to Responsive Video Embeds

Master YouTube video embedding — responsive iframes, privacy-enhanced mode, autoplay, custom parameters, and accessibility best practices.

Hanul LeeMar 16, 2026
Developer10 min

Complete Guide to Password Security (2026)

Everything you need to know about creating strong passwords, enabling 2FA, and protecting your accounts from data breaches.

Hanul LeeMar 7, 2026
Developer9 min

Building a QR Code Generator in React: What I Learned

A developer's journey building a client-side QR code generator — library choices, WiFi format quirks, color contrast pitfalls, and SVG vs PNG export.

Hanul LeeApr 6, 2026
Developer9 min

Why Math.random() Is Dangerous: Building a Secure Password Generator

Learn why cryptographic randomness matters and how I built a password generator using Web Crypto API instead of Math.random().

Hanul LeeApr 6, 2026

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