Blog / Articles
Short, practical reads that explain the “why” behind calculators and common concepts—so you can make better decisions and understand the numbers.
Cron Expressions Explained (Schedules Made Simple)
Read five-field cron syntax, understand wildcards and ranges, and avoid surprises when jobs run in production.
How to Calculate GPA on a 4.0 Scale
Weighted GPA by credit hours, letter-grade points, and common pitfalls when mixing semester and cumulative GPA.
Timezone Converter Guide for Remote Teams
Schedule meetings across zones without mental math — offsets, DST, and practical tips for global teams.
Unix Timestamps Explained (Epoch Time)
Convert between Unix seconds, milliseconds, and human-readable dates — essential for logs, APIs, and databases.
robots.txt and Sitemap Basics for SEO
Learn what crawlers read from robots.txt and XML sitemaps, and how to avoid blocking important pages by mistake.
How to Create Strong Passwords (That You Can Actually Use)
Practical rules for password length, randomness, and managers — plus how to check strength before you reuse a weak one.
JWT Tokens Explained for Developers
Break down JSON Web Token structure (header, payload, signature), common claims, and safe debugging practices.
What Is Base64 Encoding (And When Should You Use It?)
Understand Base64 encoding, typical use cases in APIs and data URLs, and what it does not provide (hint: not encryption).
How to Format and Validate JSON (Developer Guide)
Fix common JSON syntax errors, pretty-print payloads, and validate structure before shipping APIs or config files.
What Is Inflation and How to Calculate Its Impact?
See how inflation erodes purchasing power over time and how to estimate future costs with a simple growth model.