Developer Knowledge Hub
In-depth technical articles, tutorials, and security deep dives created by the FindDevTools lab. Learn the mechanics behind the utilities you use every day.
Pasting enterprise JSON logs into random web formatters is a massive security risk. Learn how WebAssembly and in-browser processing solve this.
A deep dive into RFC 4648, the mathematics of Base64, and why developers MUST stop using it to hide secrets in client production code.
How exactly are 128-bit identifiers generated in the browser? A mathematical look at Crypto.getRandomValues() and collision probability.
Decoding the three layers of a JSON Web Token (Header, Payload, Signature) and exploring the dreaded 'none' algorithm vulnerability.
Exploring how browsers calculate color stops and standard color spaces (sRGB vs Oklab) when rendering complex linear gradients.
Why do spaces turn into %20 or +? A look at RFC 3986 and the legacy quirks of application/x-www-form-urlencoded data.
How poorly constructed Regex strings cause Catastrophic Backtracking, freezing servers and browsers alike.
While JSON has won the API wars, SOAP and XML remain the backbone of healthcare and banking. How do we safely convert between them?
Why Math.random() is dangerous for security keys, and how modern web standards enforce robust entropy via WebCrypto.
Why does JavaScript say an emoji is 2 characters long? A deep dive into UTF-16 surrogate pairs and exact byte counts.