Developer Guides & Engineering Articles
Practical, evidence-backed guides written for software engineers. Learn specifications, CLI tools, algorithmic details, and security best practices.
How to Format & Beautify JSON: Complete Developer Guide
Master JSON formatting across programming languages and tools. Learn about indentation, RFC 8259 standards, minification vs beautification, and CLI formatting.
JSON vs JSON5: Syntax Differences & Feature Comparison
Detailed comparison of standard JSON vs JSON5. Learn about single quotes, unquoted keys, trailing commas, comments, hexadecimal numbers, and multi-line strings.
How to Fix & Validate Malformed JSON: Step-by-Step Diagnostic Guide
Learn how to diagnose and fix invalid JSON errors including SyntaxError: Unexpected token, unexpected end of JSON input, trailing commas, and encoding issues.
How to Decode & Inspect JWT Tokens Safely
Comprehensive guide to JSON Web Tokens (JWT). Learn how to decode JWT headers and payloads, check token expiration (exp), inspect claim scopes, and verify signatures.
How Unix Timestamps Work: Seconds, Milliseconds & Y2038
Learn everything about Unix timestamps (Epoch time). Understand seconds vs milliseconds, UTC conversion formulas, ISO 8601 formatting, and the 32-bit Year 2038 problem.
Cron Expression Examples & 5-Field Reference Guide
Complete cron expression reference guide with 20+ copy-paste examples. Learn standard 5-field Unix crontab syntax, special characters (*, /, -, ,), and timezone handling.
Base64 Encoding Explained: How Binary-to-Text Encoding Works
Deep dive into Base64 encoding. Understand 6-bit binary translation, Base64 character index tables, padding with =, URL-safe Base64, and UTF-8 string encoding.
Regex Testing & Optimization Guide for Developers
Comprehensive guide to testing regular expressions in JavaScript. Learn character classes, flags (g, i, m, s, u), capture groups, lookaheads, and how to avoid catastrophic backtracking.