Blog
Practical, no-fluff guides on the topics behind our tools — written to teach, not to rank. Each article pairs with a free tool you can use right away.
What Is a JWT? Structure, Claims & Security Explained
JSON Web Tokens explained: header, payload, and signature, what claims like exp and sub mean, and the security rules that actually matter.
Web DevelopmentBase64 Encoding Explained: How It Works & When to Use It
What base64 really does, why it inflates data by 33%, base64 vs base64url, and when to reach for it — and when not to.
Web DevelopmentUUID v4 vs v7: Which Version Should You Use?
Random vs time-ordered UUIDs: how v7 fixes database index fragmentation, and when v4 is still the right call.
SecurityMD5 vs SHA-1 vs SHA-256 vs SHA-512: Which Hash Algorithm to Use
An honest comparison of common hash algorithms: what each is still good for, why MD5 and SHA-1 are broken for security, and what to use instead.
Web DevelopmentURL Encoding (Percent-Encoding) Explained
Why spaces become %20, when to encode (and what never to encode), plus the classic + vs %20 and double-encoding traps.
AI & LLMsHow Many Tokens Is 1,000 Words? LLM Token Counts Explained
Tokens aren't words: how tokenization works, the 4-characters-per-token rule of thumb, and what actually drives your API bill.
Web DevelopmentRegex Cheat Sheet: Patterns, Flags & Examples
The regex syntax you actually use — character classes, quantifiers, groups, anchors, and flags — with copy-paste examples and honest caveats.
SecurityPassword Entropy Explained: Bits, Length & Real Security
What password entropy really measures, why length beats complexity, and how to read the bits number like a security engineer.
DesignHEX vs RGB vs HSL: Color Formats Explained
When to use each CSS color format, why HSL wins for palettes, and what CMYK is actually for — with conversion examples.
DesignCSS clamp() Explained: Truly Responsive Typography
How clamp() interpolates between minimum and maximum sizes, the math behind the preferred value, and fluid type without media queries.
DevOpsCron Expressions Explained: Syntax, Examples & Pitfalls
Reading cron syntax field by field, the examples you'll actually use, and the timezone/day-of-month traps that bite everyone once.
DevOpsHTTP Security Headers Explained
What Content-Security-Policy, HSTS, X-Frame-Options and friends actually do — and the minimal set every site should ship.
Web DevelopmentUTF-8 Encoding Explained: How Characters Become Bytes
What UTF-8 really is, how its 1–4 byte patterns work with hand-checked examples, and the BOM, mojibake, and utf8mb4 traps developers still hit.