Blog
Guides and tutorials on developer tools, encoding, hashing, time and more.
HEX, RGB and HSL: A Practical Guide to CSS Color Formats
What HEX, RGB and HSL mean, when to use each, why HSL is best for tweaking shades, and how alpha (RGBA/HSLA) fits in — with conversion tips.
Read more →How to Create a QR Code (Free): A Practical Guide
How QR codes work, static vs. dynamic codes, what error correction means, and best practices for size and contrast so your code always scans.
Read more →Regular Expressions for Beginners: A Practical Cheat Sheet
The core regex building blocks — character classes, quantifiers, anchors, groups and flags — with practical patterns and tips for testing them.
Read more →How to Create Strong Passwords (and Actually Manage Them)
What really makes a password strong — length over complexity, entropy, passphrases — plus why never to reuse them and how a password manager and 2FA fit in.
Read more →URL Encoding Explained: Percent-Encoding, Query Strings & Broken Links
What percent-encoding is, reserved vs. unreserved characters, %20 vs. +, encoding non-ASCII text, and how to avoid the classic double-encoding bug.
Read more →UUID vs. Auto-Increment ID: Which Should You Use for Database Keys?
The trade-offs between auto-increment integers and UUIDs for primary keys — uniqueness, index performance, distributed systems, and where UUIDv7 fits.
Read more →What Is a JWT? How JSON Web Tokens Work (and How to Read One)
The three parts of a JWT, how it's used for stateless authentication, common claims, signed vs. encrypted, and the security rules that actually matter.
Read more →Word & Character Count Guide: Limits for Every Platform (2026)
Words vs. characters, how CJK text is counted, reading-time estimates, and a handy table of character limits for X, meta tags, Instagram and more.
Read more →camelCase, snake_case and kebab-case: A Naming Conventions Guide
A practical guide to the common identifier naming styles — camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE — and where each is used.
Read more →Is MD5 Still Safe? MD5 vs. SHA-256 vs. SHA-512 Explained
Why MD5 is considered broken, how SHA-256 and SHA-512 differ, and how to use hashes correctly for file verification and password storage.
Read more →The Complete Guide to Unix Timestamps (Seconds, Milliseconds, Time Zones)
What a Unix timestamp is, how to tell seconds from milliseconds, how time zones and UTC fit in, and how to convert timestamps to dates with examples.
Read more →Is Base64 Encryption? Encoding vs. Encryption Explained
Base64 is often mistaken for encryption. Learn the real difference between encoding and encryption, what Base64 is actually for, and when to use each.
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