Practical guides
Short explainers for the things our tools help with. Each guide ends with a free tool you can use on the spot.
The Complete Guide to .gitignore Files
What .gitignore files do, the pattern syntax explained, common mistakes, and how to fix a file that's already been committed.
JWT Explained: Structure, Claims & Security
How JSON Web Tokens actually work, what the standard claims mean, HS256 vs RS256, and the security mistakes that keep showing up in real apps.
CSS Box Shadow: The Complete Guide
How the CSS box-shadow property works, its five values explained, layering multiple shadows, and common UI patterns.
Flesch-Kincaid Readability Explained
How Flesch Reading Ease and Flesch-Kincaid Grade Level are calculated, what a good score looks like, and how to improve your writing.