This buffer can then be decoded into a UTF8 string. Base64 is a collection of related encoding designs which represent the binary information in ASCII format by converting it into a base64 representation. Lets first talk about encoding and decoding javascript, In javascript to encode a string we use btoa function. Base64 encoding schemes are commonly used when there is a need to. Each Base64 digit represents exactly 6-bits of data that means 3 bytes can be represented by 4 6-bit Base64 digits. Base64, by design, expects binary data as its input. Base64 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. Every ASCII character fits into the first byte of one of these units, but many other characters don't. To decode a base64 string, we need to create a buffer from the given base64 string. Base64 is a generic encoding schemes that encode binary data by treating it numerically and translating it into a base 64 representation. In JavaScript strings are represented using the UTF-16 character encoding: in this encoding, strings are represented as a sequence of 16-bit (2 byte) units. Mostly we deal with UFT8 strings, but any other encoding as be specified as well. Note that the encoding of the string can also be set in the om method. Let base64Data = binaryData.toString("base64") This buffer can then be decoded as base64. To convert a string to base64, we need to create a buffer from the given string. You can use these methods at the following levels. This class provides three different encoders and decoders to encrypt information at each level. You need to import 64 in your source file to use its methods. You can encrypt and decrypt your data by using provided methods. toString() method can then be used on this buffer object to decode it as required. Java provides a class Base64 to deal with encryption. It is a global function that encode a string to base64 string and to decode the encoded base64 string. The om() method can create a buffer (binary data) from a given string in a specified encoding. Base64 is a generic encoding schemes that encode binary data by treating it numerically and translating it into a base 64 representation. The Buffer class can be used to manipulate streams of binary data in Node. This module is loaded by default, hence no import is required. Node.js does not support the standard Javascript methods of atob() and btoa() for base64 conversions.īase64 encoding and decoding can be done in Node.js using the Buffer module. Encoding and decoding base64 data in Node.js can be done using the Buffer module.