AlphaCoder

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alphacoder.net

Letters to numbers and cipher tools

AlphaCoder is a free letters-to-numbers and cipher toolkit: A1Z26, A0Z25, ASCII and UTF-8 binary, Caesar, ROT13, Atbash, Vigenere, Morse with audio, Base64, hex and Unicode tools that run in your browser, plus guides and printable worksheets.

FreeWeb

Browser-side A1Z26/A0Z25/ASCII/UTF-8 binary converter; Caesar, ROT13, Atbash, Vigenere; Morse with adjustable audio and WAV download; printable worksheets with answer keys.

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