Developer Guides
Practical how-to articles for everyday dev tasks.
How to Calculate Chmod Permissions
Learn how Unix file permissions work, how to calculate octal chmod values, and which permissions to use for common scenarios.
How to Minify CSS
Reduce CSS file size by 20-50% with minification. Covers cssnano, esbuild, Lightning CSS, and a free online minifier.
How to Convert HTML to Markdown
Convert HTML to clean Markdown using Turndown, Pandoc, or an online tool. Covers syntax mapping and common pitfalls.
How to Decode JWT Tokens
Learn what JWTs are, how they work, and how to decode and inspect them — with examples and a free online tool.
How to Convert JSON to YAML
A quick guide to converting between JSON and YAML formats — when to use each, syntax differences, and a free converter tool.
How to Format SQL Queries
Write cleaner, more readable SQL with proper formatting. Covers indentation, keyword casing, and a free online formatter.
How to Use Regex (Regular Expressions)
From zero to confident with regex — covers character classes, quantifiers, groups, and practical examples.
How to Generate UUIDs
Learn about UUID versions, when to use each, and how to generate them in JavaScript, Python, and more.
How to Convert CSV to JSON
Transform CSV data into JSON format using code, CLI tools, or a free online converter.