Start With Binary Demo
Watch a byte change live while you flip each bit on and off. This is the starting point for seeing each place value's contribution.
Interactive Learning
Practice Lab
Explore how bits change a value, then test your understanding with guided byte challenges and hexadecimal targets. Apply the same ideas to octal permissions when you are ready.
Explore: Binary Demo
Toggle bits freely and watch decimal, binary, and hexadecimal update together.
Build the Byte
Build a target number, check your answer, and use a hint when you need one.
Hex Switch Game
Match hexadecimal targets with bits, check each nibble, and try another challenge.
Permissions Calculator
Connect nine permission bits to octal and symbolic modes, then solve file-access scenarios.
Try Build the Byte
Build the target before checking. Ask for a hint when needed, then read the worked explanation and try the next challenge.
Read Hexadecimal in Nibbles
Set a hex target, then match it by flipping the correct switches without relying on a conversion table. Use the feedback to check each four-bit group.
Apply Octal to Permissions
Use three groups of three bits to solve file and directory scenarios. Explain who gets access and which permission bits they need.
Open the permissions calculator →