Tutorials

GPA isn't just an average it's a weighted calculation. Here's the formula, worked examples, and the fastest way to compute it.

Time zone math is harder than it looks. Daylight saving, half-hour offsets, and meeting confusion here's how to get it right every time.

Instagram strips paragraph breaks from captions. Here's the invisible-character trick that makes them stick and the easiest way to use it.

A complete favicon set takes more than just a 16x16 ICO file. Here's the full modern setup browsers and PWAs actually need.

Practical compression techniques for JPEG, PNG, and WebP — what to use, when, and how to find the sweet spot between size and quality.

Stop being scared of regex. A practical guide with real patterns you'll actually use, with a tester you can paste them into.

Trailing spaces, double spaces, blank rows the hidden whitespace problems that break CSV imports, and the fastest ways to clean them.

JWTs are everywhere in modern auth. Decoding them is easy — doing it without leaking sensitive data takes care.

Three ways to format minified JSON locally — browser tools, DevTools, and command line. Pick the one that fits your situation.

Three faster ways to count words: browser tools, command-line, and editor shortcuts. Pick the method that fits your workflow.