Developer Guides & Tutorials
In-depth guides on JSON, XML, YAML, and the tools developers use every day.
What Is a QR Code? A Complete Guide
Learn how QR codes work, from finder patterns and Reed-Solomon error correction to static vs dynamic codes. Includes encoding modes, capacity limits, and code examples in JavaScript and Python.
What Is Base64 Encoding? A Complete Guide
Learn what Base64 encoding is, how the 6-bit alphabet and padding work, and why JWTs, images, email, and APIs use it. Includes Base64URL, code examples in JavaScript and Python, and common error fixes.
What Is JWT? A Complete Guide to JSON Web Tokens
Everything you need to know about JWT: header-payload-signature structure, standard claims, HS256 vs RS256, JWT vs sessions, and code examples for signing and verifying tokens in Node.js and Python.
What Is YAML? A Complete Guide to YAML Syntax and Usage
Everything you need to know about YAML: syntax, data types, anchors, multi-line strings, YAML vs JSON, and real-world usage in Kubernetes, Docker Compose, and GitHub Actions.
What Is XML? A Complete Guide to Extensible Markup Language
Everything you need to know about XML: syntax, namespaces, schemas, XPath, XSLT, parsing in multiple languages, and XML vs JSON comparison.
What Is JSON? A Complete Guide to JavaScript Object Notation
Everything you need to know about JSON: syntax, data types, JSON vs XML, parsing in JavaScript & Python, REST APIs, and best practices.