Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 37–48 of 105 posts
Regex lookahead vs lookbehind, explained with five production patterns: password rules, thousands separators, price parsing, and camelCase splits.
A pattern that works in PCRE can silently break in JavaScript or Python re. Here are the regex flavor differences that explain why, with fixes for each.
Chrome and Firefox can't open HEIC. Here's how to convert HEIC to JPG, PNG, or WebP entirely in your browser — no upload, no app, EXIF under your control.
Use one <picture> tag to serve AVIF, WebP, and JPG so every browser gets the smallest image it can decode. Syntax, fallback order, and the mistakes to avoid in 2026.
How to match a URL with regex and survive the three edge cases that break most patterns: trailing punctuation, balanced parentheses, and scheme-less links.
Compare strict vs loose email regex patterns, see why the RFC 5322 'official' regex is a trap, and learn the one validation pattern you should actually use.
EXIF stripping happens automatically when you re-encode an image — convert or compress a photo and its GPS coordinates and camera data vanish. Here's why.
Batch convert 50 images to WebP, AVIF, JPG, or PNG at once, entirely in your browser — no upload, no sign-up, and your files never leave your device.
Learn how to test a regex pattern online without writing code: paste, highlight, and debug matches, plus why the same regex passes in Python but fails in JS.
A practical regex cheatsheet for 2026: 25 ready-to-paste patterns for emails, URLs, dates, and log parsing, plus the syntax rules behind them.
Converted a PNG to JPG and the file grew? Here's why JPEG bloats flat graphics and screenshots, and the quick fix that actually shrinks the image.
WebP vs AVIF in 2026: real browser support dates, how much smaller AVIF files get, why AVIF encodes slower, and which format to pick for the web.