Guides & Tutorials
In-depth articles on binary, encoding, web development, and more. Each guide links to hands-on tools you can try instantly.
How Computers Store Text
From keypress to bytes on disk — understand how text is stored digitally.
What Is Binary Code?
Learn what binary code is, how it works, and why every computer depends on it.
ASCII vs Unicode vs UTF-8
Compare ASCII, Unicode, and UTF-8 to understand modern character encoding.
Base64 Encoding Explained
How Base64 works, when to use it, and why it is not encryption.
How Hex Color Codes Work
Understand #RRGGBB notation, the RGB model, and CSS color codes.
Understanding URL Encoding
Learn percent-encoding, reserved characters, and URL safety for developers.
How to Create Strong Passwords
Password entropy, NIST guidelines, and practical security tips for 2026.
What Is JSON?
JSON syntax, data types, common errors, and how APIs use it.
How to Calculate Your GPA
GPA calculation, weighted grades, and planning your final exam score.
Number Systems for Programmers
Binary, octal, decimal, and hex — when and why each base is used.
The Binary Number System Explained
Powers of 2, conversion methods, and 10 practice problems with answers.
How to Count Words for Essays
Word count targets for school, SEO, and social media platforms.