![]() ![]() The algorithm used by atob() and btoa() is specified in RFC 4648, section 4. That motivates a divide and conquer approach: Split the encoded string into substrings counting modulo 4 chars, then decode each substring and concatenate all of them. atob(): decodes a Base64-encoded string ("atob" should be read as "ASCII to binary"). The base64-decoding function is a homomorphism between modulo 4 and modulo 3-length segmented strings.btoa(): creates a Base64-encoded ASCII string from a "string" of binary data ("btoa" should be read as "binary to ASCII"). ![]() Approach : Here we will create a gfg.js file which will include JavaScript code and one gfg.html file. The below approaches show the methods to convert an image into a base64 string using Javascript. In Node.js, Buffer is a global object which means that you do not need to use require statement in order to use Buffer object in your applications. In this article, we will convert an image into a base64 string using Javascript. In JavaScript there are two functions respectively for decoding and encoding Base64 strings: Encoding Base64 Strings with Node.js The easiest way to encode Base64 strings in Node.js is via the Buffer object. One common application of Base64 encoding on the web is to encode binary data so it can be included in a data: URL. Base64 is commonly used in a number of applications including email via MIME, and storing complex data in XML. This is to ensure that the data remain intact without modification during transport. The term Base64 originates from a specific MIME content transfer encoding.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 ASCII. The atob() method is used to convert the Base64 to a string. 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. In the above example, the btoa() method is used to convert the string to Base64.
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