Free coding labs for beginners

Learn programming concepts by interacting with 12 browser-based tools. Explore binary arithmetic, Boolean gates, ASCII, ciphers, signal timing, memory, and a mini CPU.

Binary Calculator

Add binary numbers and follow each carry through the ripple-carry process.

Boolean Compiler

Evaluate Boolean expressions and compare outputs in a generated truth table.

Logic Puzzles

Identify logic gates from their input and output truth tables.

ASCII Decoder

Encode text as binary or decode binary values back into text.

Binary Clock

See the current time represented with binary digits.

Matrix Cipher

Try a Caesar cipher and inspect how each character maps to binary.

Half-Adder Builder

Combine XOR and AND gates to understand one-bit binary addition.

Signal Timing

Compare input and output signals across a logic gate timing diagram.

Flip-Flop Lab

Experiment with SR, D, and JK flip-flops as simple digital memory.

Circuit Save & Share

Build logic circuits and encode them for saving or sharing.

Mini CPU Simulator

Step through instructions in a small processor with four registers.

Circuit Explainer

Explore worked circuit examples and learn how their gates operate together.