![]() ![]() Hence, one can see that the Base64 encoding is not encryption but just a way to transform any given data into a stream of printable characters which can be transmitted over network. Base64 strings will always be divisible by 4. The only exception is the last 4 characters which will vary depending on the number of signs. Each character represents 6 bits, so each group of 4 decodes into 3 bytes (8 bits per byte). This is to ensure that the data remain intact without modification during transport. Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with ASCII. A binascii.Error exception is raised if s is incorrectly padded. The term Base64 originates from a specific MIME content transfer encoding. Optional altchars must be a bytes-like object or ASCII string of length 2 which specifies the alternative alphabet used instead of the + and / characters. = is not part of base64 character set. Base64 Works with groups of 4 characters. Decode the Base64 encoded bytes-like object or ASCII string s and return the decoded bytes.If the given ASCII value is represented in lesser character then rest of characters are padded with =. Because an ASCII character can take any out of 256 characters, which needs 4 characters of Base64 to cover. You can use this method to encode data which may otherwise cause communication problems, transmit it, then use the atob () method to decode the data again. ![]() Base64 encoding occurs in size of 4 characters. The btoa () method creates a Base64 -encoded ASCII string from a binary string (i.e., a string in which each character in the string is treated as a byte of binary data). URL encode all non-alphanumeric characters, including those in base-64 encoded data.Let us take examples of few ASCII characters when encoded to Base64. These sixty four character set is called Base64 and encoding a given data into this character set having sixty four allowed characters is called Base64 encoding. Value Encoding Value Encoding Value Encoding Value Encoding It represents binary data in a printable ASCII string format by translating it into a radix-64 representation. Such non-text(binary) represenation is encoded in textual format such that each ASCII character takes one out of sixty four( A-Z, a-z, 0-9, + and /) possible character set. Base64 is a binary-to-text encoding scheme. For data transmission, data can be textual or non-text(binary) like image, video, file etc.Īs we know, during transmission only a stream of data(textual/printable characters) can be sent or received, hence we need a way encode non-text data like image, video, file.īinary and ASCII representation of non-text(image, video, file) is easily obtainable. ![]()
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