![]() ![]() Js-base64 provides a comprehensive Base64 API with support for Unicode and other encodings. There are different third-party libraries available for decoding Base64 data in JavaScript. How to decode Base64 data in JavaScript using a third-party library It may be necessary to use a third-party library if the Base64-encoded data contains non-ASCII characters. Note that the atob() function only works with ASCII strings. After that, we log the decoded string to the console. This string is passed to the atob() function, which returns the decoded binary data as a string. We begin with the Base64-encoded string SGVsbG8gV29ybGQh, which represents the string “Hello World!”. Here is an example of how to use atob() to decode Base64 data: const base64String = 'SGVsbG8gV29ybGQh' // Base64-encoded string constdecodedString = atob(base64String) // Decoded string console.log(decodedString) // Output: "Hello World!" Atob() takes a Base64-encoded string as input and returns the decoded binary data. ![]() Using JavaScript’s built-in functions, such as atob(), you can easily decode Base64 data. How to decode Base64 data in JavaScript using built-in functions For example, it is used in email attachments, HTML images, and JSON Web Tokens (JWTs). Whenever the last chunk of data is less than six bits, it is padded with zeros to make it a full six bits.īase64 is commonly used for transmitting data over the internet and storing data in files. Each chunk of data is represented by a character from the Base64 character set, divided into six-bit chunks and encoded in Base64. If the final data block is less than 6 bits, it is padded with zeros to ensure that it is a full 6 bits in length.īase64 uses 6 bits per character to represent binary data. These characters include the 26 uppercase and lowercase letters of the English alphabet, the 10 numerals, and two extra characters that vary depending on the implementation. In order to accomplish this task, the binary data is converted into a representation known as radix-64, which consists of 64 characters. Best practices for using Base64 in JavaScriptĪ Javascript binary-to-text encoding system called Base64 displays binary data as ASCII strings.How to decode Base64 data in JavaScript using a third-party library.How to decode Base64 data in JavaScript using built-in functions.This article discusses how to decode Base64 data in JavaScript, covering the following topics: JavaScript provides native functions and modules for encoding and decoding Base64 data. ![]() It is frequently used to store data in files and send data over the internet. ![]() writeFile ( 'my-file.Base64 is a binary-to-text encoding system that converts binary data into radix-64 representations, which are then encoded as ASCII strings. 'use strict' const fs = require ( 'fs' ) let encodedData = '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元BuZz+yVk4AAAAXdEVYdFRodW1iOjpNVGltZQAxNTQ3OTY3NDA31prSfAAAAA90RVh0VGh1bWI6OlNpemUAMEJClKI+7AAAAFZ0RVh0VGh1bWI6OlVSSQBmaWxlOi8vL21udGxvZy9mYXZpY29ucy8yMDE5LTAxLTIwL2FiNTYzZDE0NTc0M2FjZTQ2ZGQ3NjY5MzE1OTk1ZTdlLmljby5wbmeQ70QpAAAAAElFTkSuQmCC' let buff = Buffer. ![]()
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