Technical resources and reference guides for modern developers
Learn best practices and deep dives into technologies that matter. Our guides combine theory, practical examples, and real-world patterns that developers encounter daily.
What "Unexpected token '<'", "Unexpected end of JSON input" and similar errors mean in Chrome, Firefox, Safari, Node, Python and Jackson. Covers HTML error pages, empty bodies, BOMs, double-encoded and truncated payloads, with defensive parsing code for JavaScript and Python.
Read Guide →A real token decoded part by part, the registered claims, and when to choose HS256, RS256 or ES256. Covers the checks every server must perform, the "none" and algorithm-confusion attacks, refresh tokens, revocation, browser storage and clock skew.
Read Guide →GitHub Flavored Markdown table rules, column alignment, escaping pipes inside code, line breaks in cells, HTML fallbacks for merged cells, generating tables from CSV or JSON, and how GitHub, GitLab, VS Code, Hugo and MDX render them differently.
Read Guide →How three bytes become four characters, padding and the 33% size overhead, Base64 vs Base64URL, the btoa Unicode bug and its fix, and correct usage from the shell, Python and Java, plus what to use instead when you actually need to protect data.
Read Guide →Learn everything about JSON syntax, common errors, formatting best practices, and validation techniques. Covers the 6 JSON data types, the 7 most common syntax mistakes, and how to validate JSON before deploying to production.
Read Guide →A clear comparison of YAML and JSON covering syntax differences, use cases, performance implications, and when each format is the right choice. Learn why Kubernetes uses YAML, when JSON is superior, and how to convert between them.
Read Guide →Understand percent-encoding, the critical difference between encodeURI and encodeURIComponent, how to build query strings correctly, and common encoding mistakes. Includes code examples and explains RFC 3986 standards.
Read Guide →