Text Cipher Tool
Encode or decode text with a Caesar cipher or Base64.
How to use this tool
Choose Caesar Cipher to shift every letter by a fixed number of positions in the alphabet — drag the shift slider from 1 to 25 to set how far each letter moves. Choose Base64 instead to convert text into the ASCII-safe encoding commonly used for embedding data in URLs, JSON, or email attachments. Toggle between Encode and Decode to run the transformation in either direction, type your text into the Input box, and the result appears instantly in the Output box, ready to copy with one click.
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