Web & SEO
301 vs 302 vs 307 vs 308 Redirects Explained
Permanent or temporary, and does the request method matter? Those two questions decide between 301, 302, 307 and 308. Here's what each code means and how Google treats it.
Blog
Guides, tips and how-tos for getting more out of free web tools, from formatting JSON to building better passwords.
Web & SEO
robots.txt vs noindex: How to Keep a Page Out of Google
Blocking a page in robots.txt doesn't remove it from Google, and it can stop your noindex from working. Here's how crawling and indexing differ, and what to use when.
Security & Privacy
MD5 vs SHA-256 vs bcrypt: Which Hash to Use
MD5, SHA-256 and bcrypt solve different problems. Here's which one fits checksums, signatures and password storage, and why speed decides it.
Developer Guides
UUID v4 vs v7: Which Should You Use?
Version 4 UUIDs are random, version 7 UUIDs are ordered by time. Here's what's inside each one, why it matters for database indexes, and how to pick.