Online Caesar Cipher in Javascript

The Caesar Cipher is a simple alphabet-shifting cryptography method. For example if the message is 'hello' and the key is 2, then each letter is replaced by the second letter following it in the alphabet and the message becomes 'jgnnq'. To decypt the message, use the reverse operation : replace each letter by the one 2 letters before it in the alphabet (or 24 letters after it).

The message in the text box to the left is encrypted, press the button to see all the possible decryptions.

Text to shift	Shifted text
Zkogzads rgheshmf zs sgd oqdrr ne z atssnm!!! <aq>Sghr ozfd hr lzcd trhmf nmkx okzhm uzmhkkz izuzrbqhos. Xnt bzm uhdv sgd rntqbd sn knnj zs sgd bncd. Hs hr z enkknvto sn lx <z gqde="gsso://vvv.mhbnmnlhbnm.mds/aknf/2009/01/08/1144.qns.m/">onrs zants sgd Bzdrzq bhogdq</z> nm lx <z gqde="gsso://vvv.mhbnmnlhbnm.mds/aknf">aknf</z>.<aq> - <a>Vzqmhmf: </a><h>Hs vhkk rghes nmkx sgd zkogzads zrbhh bgzqzbsdqr, mns sgd zbbdmstzsdc kdssdqr khjd &dzbtsd; &dfqzud; &dbhqb; dsb...</h>. He sgdrd kdsssdqr zqd tmhbncd sgdx vhkk mns ad rghesdc, zmc he sgdx zqd hm sgd gslk &...; enqlzs sgd ... bgzqzbsdqr vhkk ad rghesdc.<aq> - Sn uhdv sgd rntqbd ne xntq ezunqhsd qdrtks, bkhbj nm hs, zmc hs vhkk zoodzq hm sgd nsgdq sdws anw. <aq> - <a>Vzqmhmf: </a>He xnt vzms sn qdtrd sgd rdkdbshnm, ad rtqd sn qdlnud zkk "zlo;" eqnl sgd rdkdbshnm he xnt gzud zbbdmsr nq nsgdq rodbhzk bgzqzbsdqr. <aq><aq><aq><aq> Selected Shifted Text Source Key used to decode: [?] Key used to encode: [?] The full source of the result you select will appear here	All 26 possible cipher texts will appear here.

Text to shift

Shifted text

Selected Shifted Text Source

Key used to decode: [?]
Key used to encode: [?]

All 26 possible cipher texts will appear here.

©Nicolas Hoibian, 2009. This webpage is licensed under the creative commons "Attribution" license.
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