Input
Output
Input
Output
Cipher Mapping
Base64
Encodes data into ASCII using 64 characters (A-Z, a-z, 0-9, +, /).
Binary
Each character to its 8-bit binary form. "Hi" becomes 01001000 01101001.
Hexadecimal
Each character to its hex byte value. "Hi" becomes 48 69.
ROT13
Rotates letters by 13 positions. Self-inverse — apply twice to get the original.
Morse Code
Letters and digits to dots and dashes. Words separated by /.
URL Encoding
Percent-encodes special characters for safe use in URLs.
Atbash
Maps A to Z, B to Y, C to X, etc. Classic monoalphabetic substitution.
Caesar
Shifts each letter by a fixed number. Adjustable shift 1-25.
Custom
Your personal substitution table: A to E, B to Q, C to T, and so on.