Engineering Blog
Technical deep-dives on web performance, security, and developer tooling. Written by engineers, for engineers.
Stop Base64 Encoding Your Secrets: Why Base64 is Not Encryption
A definitive guide to why Base64 encoding provides zero security, the critical differences between encoding, hashing, and encryption, and how to secure your data in 2026.
SVG vs PNG for Web Performance in 2026: Which One Should You Use?
Choosing the wrong image format kills your Core Web Vitals. Discover when SVGs cause massive DOM bloat and when PNGs are essential for high-performance websites in 2026.
Debug Malformed JSON Your Parser Won't Explain
Trailing commas, invisible Unicode, unquoted keys — JSON.parse() just says 'unexpected token.' Here's how to actually find and fix every error.
Fix Render-Blocking Resources That Tank CWV
Stop render-blocking CSS and JS from destroying your Core Web Vitals. Inline critical CSS, defer scripts, and minify code with proven fixes.
Regex Catastrophic Backtracking Crashed My Server
A single regex pattern brought down a Node.js server. Learn how catastrophic backtracking works and how to write safe regular expressions.
Stop Storing JWTs in localStorage Right Now
LocalStorage JWTs are an XSS magnet. Learn secure token storage patterns with httpOnly cookies, token rotation, and real attack scenarios.
WebP vs PNG vs AVIF: Pick the Wrong Format, Tank LCP
Choosing the wrong image format silently inflates LCP by seconds. Compare WebP, PNG, AVIF, and JPEG for real performance benchmarks.
Why Math.random() Will Get Your Users Hacked
Math.random() is not cryptographically secure. Learn why it fails for passwords, tokens, and IDs — and how to use crypto.getRandomValues() correctly.