#Base64 decode node how to
To learn more about Base64 encoding/decoding, how it works, why it is required, and how to Base64 encode/decode in different programming languages, check out the blog section. Buffer objects are similar to arrays of integers from 0 to 255. We also have a tool to encode any binary data to Base64 encoded format. You can decode any Base64 encoded data using the built-in Buffer API provided by Node.js. You can decode any Base64 encoded data using the built-in Buffer API provided by Node.js. To learn how Base64 encoding and decoding work, check out this article. You should not use Base64 encoding as a means to hide sensitive data. Note that, Base64 should not be confused with encryption or compression techniques. For server-side JavaScript (Node), you can use Buffer s to decode. It's using btoa () and atob () functions. Take a look at this Stackoverflow question. It converts the Base64 encoded data back to binary data. 16 Answers Sorted by: 272 Some browsers such as Firefox, Chrome, Safari, Opera and IE10+ can handle Base64 natively. You have to create a new buffer object and pass two parameters to its constructor. toString ( 'base64' ) // print Base64 string console. from ( str, 'utf-8' ) // decode buffer as Base64 const base64 buff.
#Base64 decode node code
Decoding Base64 string is quite similar to encoding it. I am using the following code to decode a Base64 string in the Node.js API, Node.js version 10.7.0: let data 'c3RhY2thYnVzZS5jb20' // Base64 string let buff new Buffer(data, 'base64') //Buffer let text buff.toString('ascii') // This is the data type that you want your Base64 data to convert to console.log(''' + data + '' converted. Here's how to do Base64 encoding and decoding using Buffer in Node.js Encoding // plain-text string const str 'This will be encoded in base64' // create a buffer const buff Buffer. Base64 decoding is the inverse process of encoding. node encode-text.js '' converted to Base64 is 'c3RhY2thYnVzZS5jb20' In the output we can see Base64 counterpart for the string that we converted to Base64.
Again, create a buffer instance using the Buffer.
Decoding a base64-encoded string is also possible using the global Buffer class.
The encoded data can be converted back to the original image or file at the receiver’s end using Base64 decoding. Here’s a code snippet translating a string in UTF8 encoding to base64: const encoded om('username:password', 'utf8').toString('base64') // 'dXNlcm5hbWU6cGFzc3dvcmQ' Base64 Decode a Value in Node.js. Therefore, if you want to send images or any other file via email, you first need to encode the image or file to Base64 encoded format and then send the encoded data to the email server. The Bufferobject is not just limited to Base64 conversions. We looked at how to use the native Buffer module to perform the Base64 encoding and decoding in a Node.js application. There are 1543 other projects in the npm registry using base-64. Thats all for Base64 encoding and decoding in Node.js. Start using base-64 in your project by running npm i base-64. Latest version: 1.0.0, last published: 3 years ago. Latest version: 1.0.0, last published: 3 years ago. A robust base64 encoder/decoder that is fully compatible with atob() and btoa(), written in JavaScript. Please show your love and support by sharing this post.For example, email servers were traditionally designed to handle textual data from the ASCII character set. A robust base64 encoder/decoder that is fully compatible with atob() and btoa(), written in JavaScript.
Therefore, to properly decode strings that are encoded with multibyte binary data, you should use the " utf8" encoding method with the Buffer.toString() method, for example, like so:Ĭonst fromBase64 = (str) => om(str, 'base64').toString('utf8') Ĭonsole.log(fromBase64('8J+mig=')) // '🦊'Ĭonsole.log(fromBase64('44GT44KT44Gr44Gh44Gv')) // 'こんにちは'Ĭonsole.log(fromBase64('Zm9vYmFy')) // 'foobar' For example, you can achieve this in the following way:Ĭonst binaryStrBuffer = om(encodedStr, 'base64') Ĭonst decoded = binaryStrBuffer.toString('ascii') Īlthough encoding to an " ascii" string is fast, it is limited to working only with strings that are encoded with single-byte binary data, which means that it may not be suitable for decoding multibyte base64-encoded strings.įor example, consider the following multibyte base64-encoded string that represents a fox emoji ( 🦊), but incorrectly outputs " p&" with " ascii" string encoding:Ĭonst binaryStrBuffer = om('8J+mig=', 'base64') Ĭonst decoded = binaryStrBuffer.toString('ascii')) Similar to encoding a base64 string, the easiest way to decode a base64-encoded string in Node.js is to use the built-in Buffer object.
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