In contrast, the atob() function decodes a string that has been encoded using the Base64 format and returns it. The btoa() function returns a Base64 encoded ASCII string from a string of binary data, where each character represents an 8-bit byte. This works on almost all modern browsers such as Chrome, Firefox, Safari, Opera, and IE 10+. This page was designed to be helpful to developers and anyone doing programming work. You can use btoa() and atob() functions, respectively for encoding and decoding Base64 strings. Hex Options Decode as Image This is a simple online base 64 encoder and decoder. Base64 is commonly used in a number of applications, including email via MIME and storing complex data in XML. The btoa () method creates a Base64 -encoded ASCII string from a binary string (i.e. However, the atob() function doesn't work properly if the encoded data contains DOMStrings which are 16-bit encoded. Javascript has a built-in function named atob() which performs Base64 decoding. This is to ensure that the data remain intact without modification during transport. Learn how to decode a Base64 encoded data back to normal text in Javascript. Each Base64 digit represents exactly 6-bits of data that means 3 bytes can be represented by 4 6-bit Base64 digits.īase64 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 textual data. This post will discuss how to encode and decode strings in JavaScript with Base64 format.īase64 is a group of similar binary-to-text encoding schemes representing binary data in an ASCII string format by translating it into a radix-64 representation.
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