Decode base64 string3/31/2023 ![]() The end of s can consist of zero, one, or two padding characters. The valueless character, "=", is used for trailing padding. An arbitrary number of white-space characters can appear in s because all white-space characters are ignored. The white-space characters, and their Unicode names and hexadecimal code points, are tab (CHARACTER TABULATION, U+0009), newline (LINE FEED, U+000A), carriage return (CARRIAGE RETURN, U+000D), and blank (SPACE, U+0020). The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", lowercase characters "a" to "z", numerals "0" to "9", and the symbols "+" and "/". S is composed of base-64 digits, white-space characters, and trailing padding characters. The default btoa() function works well for binary data consisted of 8-bit bytes(). Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to. ![]() The term Base64 originates from a specific MIME content transfer encoding. The following example uses the ToBase64String(Byte) method to convert a byte array to a UUencoded (base-64) string, and then calls the FromBase64String(String) method to restore the original byte array. Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. s contains a non-base-64 character, more than two padding characters, or a non-white space-character among the padding characters. The length of s, ignoring white-space characters, is not zero or a multiple of 4.
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