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Decode Base64 Online


Use this incredibly easy tool to Decode any Base64 encoded string to text. Maximum string size limit is 2048 Characters.









Base64 Conversion is used to convert any format to data in to ASCII representation i.e. English alphabet characters. It is also used to support protocols that are only capable to handle 7 bit of data such as email protocols. When you Encode to Base64 your data size is increased to a ratio 4:3 which is almost 33% overhead.

One might observe that sometimes Encoded Base64 string contains a single '=' or '==' or sometime none of them. The '=' help in Base64 Decoding to original text. Generally four Encoded characters to three Decoded characters. If the Encoded String ends with '=' it indicates that four characters will Decode to only two bytes. If Base64 Encoded string ends with '==' it tell the Base64 Decoder that four characters will decode to only one byte.


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