Developer Guides
In-depth articles on every tool — the concepts behind them, how they work, and when to use them.
Formatter
3 articlesUnderstanding JSON: A Complete Developer Guide
JSON is the lingua franca of modern APIs. Learn exactly what makes it strict, why that strictness matters, and how a formatter helps you navigate it every day.
Markdown Syntax: The Developer's Writing Language
Markdown is how developers write documentation, READMEs, and technical content. A complete reference of the syntax, its variants, and best practices.
SQL Formatting Best Practices for Readable Queries
Unformatted SQL is nearly unreadable in production codebases. Learn why consistent formatting matters, what the conventions are, and how auto-formatting fits into a development workflow.
Cryptography
5 articlesAES Encryption: How the World's Most-Used Cipher Works
AES is in every TLS connection, every encrypted disk, every secure messaging app. Learn how it works, what the modes mean, and how to use it correctly.
Password Hashing with Bcrypt: A Security Deep Dive
Bcrypt is the gold standard for password hashing. Learn how the cost factor provides future-proof security, why fast hashes are dangerous for passwords, and how bcrypt compares to newer alternatives.
MD5 Checksums: File Integrity Verification Guide
MD5 produces 128-bit checksums used for verifying file integrity. Learn what MD5 is good for today, where it fails, and how to use it correctly.
SHA-1: History, Weaknesses, and When It's Still Used
SHA-1 was once the backbone of web security. Today it's considered broken for most purposes. Learn what happened, why, and where SHA-1 still appears in the wild.
SHA-256 Explained: How Cryptographic Hashing Works
SHA-256 is the hash function behind Bitcoin, TLS certificates, and code signing. Understand how it works, why it's secure, and what it's used for in everyday development.
Encoding
3 articlesBase64 Encoding Explained: Why It Exists and How to Use It
Base64 turns binary data into safe ASCII text. Learn why this was necessary, how the algorithm works, and the common variants you'll encounter.
JSON Web Tokens: Structure, Claims, and Security
JWTs are everywhere in modern auth. Learn what the three parts are, what the standard claims mean, and the security mistakes that expose your application.
URL Encoding: Percent-Encoding and Safe Characters
Not all characters are safe in URLs. Learn which characters need encoding, how percent-encoding works, and when to use encodeURI vs. encodeURIComponent.
Generator
4 articlesColor Theory for Developers: Harmonies and Design Systems
Color choice is one of the most impactful design decisions in a UI. Learn the color models, harmony rules, and how to build a design system palette.
QR Codes: How They Work and Where They're Used
QR codes encode URLs, text, and contact info in a 2D barcode that any smartphone camera can read. Learn the structure, error correction levels, and use cases.
URL Slugs: SEO-Friendly URL Design Principles
A slug is the human-readable part of a URL. Learn how to generate clean slugs, what makes a URL SEO-friendly, and the edge cases your generator needs to handle.
UUIDs Explained: Versions, Formats, and When to Use Each
UUIDs are the standard for generating unique identifiers without coordination. Learn the differences between v1, v4, v5, v6, and v7, and which to use in your application.
Utility
4 articlesCron Syntax Demystified: Scheduling Jobs Like a Pro
Cron is the universal scheduling language for Unix systems. Learn how to read and write cron expressions, the edge cases that trip people up, and modern alternatives.
Regular Expressions: Patterns, Pitfalls, and Best Practices
Regex is powerful and cryptic. Learn the core syntax, the most useful patterns for everyday development, and the common mistakes that cause bugs in production.
Unix Timestamps: Epoch Time and Time Zone Handling
Unix timestamps are the universal language of time in computing. Learn what epoch time is, how to convert it, and the timezone pitfalls every developer hits eventually.
Text Metrics: Word Count, Readability, and Why They Matter
Counting words and characters is deceptively nuanced. Learn how word boundaries are defined, what readability scores measure, and when text metrics actually matter for your content.
Image
1 articleEmbedding Images as Data URLs: When and How
Data URLs let you embed image content directly in HTML, CSS, and JavaScript without a separate HTTP request. Learn the trade-offs, use cases, and limits of image-to-Base64 embedding.