Practical articles on JSON, CSS, Base64, SEO, structured data and more. Each guide pairs real code examples with free tools so you can go from reading to shipping in minutes.
Everything about ISO 8601 — the YYYY-MM-DDTHH:mm:ssZ format, timezone offsets (Z vs +00:00), durations, week numbers, and how to use it in JavaScript, Python, PHP, SQL, and HTML.
Everything you need to know about Cron expressions — the five-field syntax, special characters, common schedule patterns, timezone gotchas, and how Cron works in GitHub Actions, AWS EventBridge, Laravel, and Kubernetes.
How to convert JSON to TypeScript interfaces automatically — the type mapping rules, how to handle null values, common patterns for API response wrappers, and when to use Zod for runtime validation instead of plain interfaces.
A practical guide to 1D barcode formats — how CODE128, EAN-13, EAN-8, and UPC-A differ, how the check digit algorithm works, print-quality tips (SVG vs PNG), GS1 registration requirements, and how to generate barcodes free in your browser.
How to count characters and words for social media, SEO, and writing. Includes character limits for Twitter/X, Instagram, LinkedIn, meta tags, and best practices for each platform.
What makes a strong password — length requirements, character types, passphrase vs random password, password managers, and how to check your password strength. Includes a free password generator tool.
Everything you need to know about favicons — which sizes to generate, the correct HTML for every browser, iOS apple-touch-icon, Android manifest icons, PWA support, and how to implement in Next.js, WordPress, and static site generators.
A practical guide to robots.txt — from basic User-agent and Disallow syntax to blocking AI crawlers like GPTBot and ClaudeBot, setting up Sitemap directives, and avoiding the mistakes that silently hurt your SEO.
A developer's guide to UUID — how v4 random generation works, when to use v1 vs v5 vs v7, the difference between UUID and GUID, and best practices for storing UUIDs as database primary keys.
The complete reference for CSS gradients — syntax, color stops with position %, transparency, gradient text, border effects, and layered backgrounds. Includes copy-ready code for linear-gradient, radial-gradient, and conic-gradient.