It converts the binary information into plain ASCII text format. With this ultimate guide on base64 encoding method in javaScript, Base64 encoding makes it easier for systems and networks to communicate. Base64 encoding is commonly used when there is a need to transmit binary data over media that do not correctly handle binary data and is designed to deal with textual data belonging to the 7. It represents binary data in a printable ASCII string format by translating it into a radix-64 representation. In this well-commented example we convert an image to base64 encoded string, and re-generate a copy of the image from the base64 encoded string. We can encode or decode unlimited characters without facing any system compatibility restrictions. Base64 is a binary-to-text encoding scheme. Base64, by design, expects binary data as its input. Every ASCII character fits into the first byte of one of these units, but many other characters dont. Once you get the basics of Buffer and encoding, you can use your knowledge of the File System module to encode files to base64 strings. 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. Both atob () and btoa () work on strings. On the contrary, the btoa () function creates a base-64 encoded ASCII string from a 'string' of binary data. Now decode it to something humans can read: var b = new Buffer('4a617661536372697074', 'hex') In JavaScript there are two functions respectively for decoding and encoding base64 strings: The atob () function decodes a string of data which has been encoded using base-64 encoding. Let's encode a base64 encoded string to hex: var b = new Buffer('SmF2YVNjcmlwdA=', 'base64') This javascript code is used to encode / decode data using base64 (this encoding is designed to make binary data survive transport through transport layers. ![]() We can make it convert to other formats by passing the encoding type to toString(). If we don't pass the encoding type to toString(), Node.js assumes we want to convert the object to utf8 encoded string by default. Once we have the encoded string, we call the toString() method on the string. Notice how we did that in the decoding example. Answers for 'base64 encoding in javascript' Javascript. The possible encoding types are ascii, utf8, ucs2, base64, binary, and hex, the default being utf8.īy passing the second parameter, we tell JavaScript that "the string you see is encoded in this particular format". The Buffer() constructor requires a number, array or string as the first parameter, and an optional encoding type as the second parameter. If you are interested in the details of how the above examples worked, follow me. Here is how you encodetext to base64 in Node.js: var b = new Buffer('JavaScript') Īnd here is how you decode base64 encoded strings: var b = new Buffer('SmF2YVNjcmlwdA=', 'base64') ![]() How to Base64 encode and decode in Node.js #
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