Hex / int / bytes conversion Dry Run in PYTHON

Hex / int / bytes conversion is an interactive PYTHON dry run visualizer from the Bytes programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Hex / int / bytes conversion Program Code

# bytes ↔ hex
b = b"Hello"
hex_str = b.hex()
print("hex:", hex_str)                # 48656c6c6f
b2 = bytes.fromhex(hex_str)
print("fromhex:", b2)                 # b'Hello'

# bytes ↔ int (big-endian)
num = 0x12345678
b_int = num.to_bytes(4, byteorder='big')
print("int to bytes:", b_int.hex())   # 12345678
num2 = int.from_bytes(b_int, 'big')
print("bytes to int:", hex(num2))     # 0x12345678

# bytearray with hex
ba = bytearray(b"abc")
ba.hex()                               # '616263'

View the complete Bytes programs page.