Computers store all data in binary — every file, image, and message is just 0s and 1s: 255 in decimal is 11111111 in binary
One hex digit maps exactly to 4 binary bits: F in hex is 1111 in binary
The color #FF5733 is hex notation — FF = 255 red, 57 = 87 green, 33 = 51 blue
IPv4 addresses are sometimes written in hex — 192 is C0, 168 is A8 in hexadecimal
Unix file permissions like 755 in octal are 111 101 101 in binary — 7 = rwx, 5 = r-x
About Number Base Conversion
Number base conversion changes how a number is written, not its value. Binary (base 2) uses only 0 and 1, octal (base 8) uses 0–7, decimal (base 10) uses 0–9, and hexadecimal (base 16) uses 0–9 and A–F. Click any result to copy it.