Learn
Guides & cheat sheets
Short, practical references written in plain language — the kind of page you open while you are actually doing the thing.
Base64 Explained: Encoding, Not Encryption
Guide
What Base64 really does, why URLs need the safe variant, and why "encoded" never means "secret".
Markdown ↔ HTML: When to Convert Either Way
Guide
Blogging, email, CMS imports — a practical decision guide plus the syntax that survives conversion.
How to Read a Unix Timestamp
Guide
Seconds versus milliseconds, timezones, and the mental math that makes epoch values readable.
WCAG Contrast for Designers, Not Lawyers
Guide
The 4.5:1 and 3:1 rules explained, with palettes that stay compliant without killing the aesthetic.
What Is a Hash? (And When Not to Use One)
Guide
One-way functions explained: checksums, passwords, and why SHA-256 is not encryption.
Understand JWTs in 10 Minutes
Guide
What the three dot-separated parts mean, which claims to trust, and why decoding is not verifying.
Regex Cheat Sheet for Everyday Code
Cheat sheet
The twenty patterns and flags that cover most real-world matching, with copy-paste examples.