Understand how computers represent information
A collection of interactive converters for students and self-learners. Type a value and watch the math unfold in real time.
New to this? Start with the tutorial
Bits, nibbles and bytes explained in plain language — plus how binary, hex and ASCII all describe the same data.
Read the tutorial →Binary ↔ Decimal
See how base-2 numbers break down into powers of two and convert back to decimal.
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Hexadecimal
Convert between hex, decimal, and binary with a handy 0–F reference table.
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ASCII
Explore how characters map to decimal, hex, and binary codes.
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Color Representation
Play with RGB values and hex colors to see how screens represent color.
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Binary Calculator
Add, subtract, multiply and divide binary numbers with every step shown in decimal.
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Crypto Playground
Caesar, Vigenère, XOR, Base64, hashing and toy RSA — encryption you can watch work.
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Password Generator
Mix character sets, pick a length, and watch the entropy in bits go up.
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Binary Clock
The current time in base 2, with every bit clickable so you can set it yourself.
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Regular Expressions
A live regex tester with highlighted matches, capture groups, replace preview and a cheat sheet.
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SQL Playground
Run real SQL in your browser on sample or AI-generated databases with test data.
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Why these topics?
Binary, hexadecimal, ASCII, and RGB are the building blocks of modern computing. Mastering them makes everything from memory addresses to web colors feel less mysterious.