String to base64 node. readFile(attachment, function(err, data) {.

npm i node-red-node-base64 Usage. 'base64': Base64 encoding. log(typeof body); // STRING. . Over my node. text() on it: import { Readable } from "node:stream"; const string = await new Response(Readable. encode(rs. So, it alone will not help. replace allows the browser to automatically handle the underlying memory management of resizing the string, leading a significant performance boost especially in evergreen browsers like Chrome and Firefox that heavily optimize String. 9. from(stringToEncode). The mime type 30. js >= 16. The Buffer class provides methods for encoding and decoding data in various formats, including Base64. from (str); // 3: convert buffer to Base64-encoded string const encoded Predicate that returns true if base64 string. Apr 21, 2014 · 104. I ended up to decode the pdf first and then send it to the browser as binary as follows: (For simplicity I use node-http here but the functions are available in express as well) . js, you can use the built-in Buffer class to perform Base64 encoding and decoding. encode(string); var string = new TextDecoder(encoding). const encoded = new Buffer. Sep 7, 2022 · This tutorial explains Nodejs' significance in data encoding. In the code below, we are going to create an SHA-256 hash using the default crypto module and then we use Buffer. toString('ascii') As far as it goes to your code, its not wrong base64 conversion is right, may be there can be issue in your temporary_user_id, because of that you are getting some awkward text but conversion is done right afaik. log( emBase64) // Saída: "RGV2UGxlbm8=" // Voltando para string var Jun 19, 2018 · I'm currently trying to convert images from a base 64 string to a utf-8 byte code array. zip file from a base64 string is to using npm package mws-extract-document. 8k 15 97 119. You can try something like that. Sep 6, 2017 · The interface on the server-side is a node-red-server: The data is received and the file names and the text are extracted. Sep 13, 2019 · How to make blob or File in NodeJs from base64 string. People seem to look at PEM, see more than 40 base64 characters, and their brains shut down and become unable to see the dashes-BEGIN line, the dashes-END line, and the line Apr 6, 2021 · and to decode it just use. The Buffer class plays a significant role in Nodejs base64 encode. He might read some file as a base64 string and want to convert it to file stream (something like format result of fs. js File System Node. what's the goal: client sends a ca Nov 24, 2013 · It does not make sense to "convert" a string to UTF-8. from(b64string, 'base64'); // Ta-da For Node. js stream to a web stream and then using Response. So here's the recommended way Feb 13, 2018 · As the previous answer wasn't working for me, I'm sharing this other one that worked. I want to convert it to a Base64 so that I can use it to display it in an EJS image tag. It is inefficient for large images. replace. Oct 3, 2022 · Decoding a base64 to a string. Base64 Encoding in Node. from(b64, 'base64'). The data viewer isn't going to change your data, so it doesn't matter. Encoding Text to Base64 and decoding Aug 11, 2023 · Encode base64 in JavaScript. May 15, 2021 · So if you want to encode a string into base64 in Node. from(base64data, 'base64'). from () method to create a buffer from the hash string and then encode the string in base-64. This "minimal implementation" approach goes something like this: Dec 2, 2016 · var utf8encoded = Buffer. If you have a file that works with openssl x509 -in file then it is PEM, NOT only base64. You shouldn't worry, the data is correct, the representation is wrong. charCodeAt method for each character in the string. May 27, 2015 · Alternative way to extract . Then in ‘req. To ensure correct formatting I parse my created XML string into XML Doc. To encode a string to Base64 using the Buffer object, we first create a Buffer object from the string using Buffer. node. There no magic involved, just identify the file type, create the first part ( data:image/png;base64, ) and concatenate the Base64 string. Fortunately, this can be done using some built-in Node. toString('base64')) Is there any alternate available in Node js to convert a string to base64 instead of using Buffer. js NPM Node. append() will try to derive the content-type from the filename. Luckily, Node. then () If you were using async / await it would look like the following: async function base64_encode(path,file,thebase) {. Third-Party Libraries: While not as common for Base64 encoding, you can explore libraries like base64-js or js-base64. toString first to make it work Mar 3, 2015 · I'm trying to read an image from client side encoded in base64. I don't know how to do this Feb 18, 2021 · I am using Buffer to convert a string to Base64 encoded in one of the cloud function and during bulk processing,this base64 encoding is taking 15 seconds to convert a string into base64 encoded. var str = 'VGhpcyBpcyBhbiBhd2Vzb21lIHNjcmlwdA=='; // make URL friendly: str = str. getEncodedPDF(function(encodedPDF) {. js versions. // Base64 => Buffer => Image. For example, you can achieve this in the following way: // 1: define the string to be encoded const str = 'foobar'; // 2: convert string to buffer const strBuffer = Buffer. Oct 5, 2017 · This code from node-firebird generate a invalid base64, but this work using Java. node-red. In this article, we would like to show you how to encode and decode Base64 in TypeScript. I'm trying to parse to base64 this way: console. Aug 4, 2019 · 3. Or any other encoding. Brief History. Jul 9, 2019 · I was also trying to decode a large image. Sep 5, 2017 · I need to create base64 string that I need to send to a third party API. I have tried to do it with the Buffer but the base64 it's giving me is incorrect. atob(pngBase64) instead. buffer を利用して Base64 のエンコードおよびデコードを行う例は次の通りです。. Encoding. But you can try encoding it back to base64 and compare the result with the original string: Buffer. replace(/\+/g, '-'). js, including using the built-in `Buffer` class, the `btoa()` and `atob()` functions, and the `base64-js` package. atob() decodes to bytes, which is compatible to browser built-in atob() (Which is absent in node. First, you'll need to install the request module using npm: Encoding binary data as a base64 string using Node. 4. 0 and onwards. If you have a Unicode string in Node. Node. Internally, a Buffer object is an immutable array of integers. These provide functions for encoding and decoding Base64: Using base64-js (installation required): Apr 3, 2019 · Buffer. Convert base64 string into byte array through javascript. I need to pass the responsed image into a web service which requires an uint8array base image. Jul 24, 2020 · One "node" of my node-red flow outputs an image as a buffer or a base64 string. The Buffer object in Node. from( str, 'utf-8'); // decode buffer as Base64 const base64 = buff. Nov 15, 2020 · Things tend to get a bit more complicated when you want to convert a regular (base64) string into an actual image. Base64. from(base64String, 'base64'). js provides a way to work with binary data. baseurl64 buffer decoding. But when saving the image (which is a Base64-encoded string) only writes the string in a jpg-file. Jun 5, 2021 · The result from Buffer. I have that image stored as a base64 encoded string (ie: "data:image/png;base64,iVBOR" etc. currentImage: index, currentImagebase64: base64. I'm trying to encode an image using base64 in Node. To be honest, I don't know, that's a solution I have arrived to after a day of experimenting. The maximum file size which can be uploaded this way is 60 MB - for larger files, you should upload the file data using the standard upload methods, or by passing a remote URL. js Modules Node. Just do this and it will solve the issue. PDF file. how to convert binarystring to base64. The simplest way to convert a string to Base64 encoded format in Node. Since version 3. js MySQL MySQL Get Started MySQL Create Database MySQL Create Table MySQL Insert Into MySQL Select From MySQL Where MySQL Order By MySQL Delete MySQL Drop May 7, 2015 · Another plus is that (especially for big strings), String. from(str, "base64"); stream. js/JS (well actually CoffeeScript, but CoffeeScript is just JavaScript so lets say JS) app. log(str);// hi readers. from(base64EncodedfileData,'base64'); So far I can write a file with the following piece of code: Jul 18, 2017 · node-canvas provides loadImage which accepts base64 and appears to be a promisified Image() at a quick glance (although it provides Image as well, which seems to work fine just like the browser): Feb 1, 2022 · 7. update(yourMessage). original = user1:password-goes-here! decoded = user1:password-goes-here! ちゃんと、エンコードした文字列から元の文字列に戻ったことが確認できました Aug 19, 2023 · In Node. This Base64 data can then be embedded directly into an HTML image tag, allowing the image to be displayed within the web page without linking to an external file. js). Mar 7, 2022 · I am getting a blob image in response to an internal call to a MicroService in node ts. toString("utf8"); console. toString() default encoding is utf8, and you can't convert from utf8 back to Buffer without breaking the image. 6,535 5 31 24. This method takes two parameters, a plain-text string, and the character encoding, and creates a buffer or binary data array for the given encoding. js Get Started Node. Since you’re receiving a Buffer back as output, Buffer. Nov 18, 2021 · Here’s a code snippet translating a string in UTF8 encoding to base64: const encoded = Buffer. js Email Node. js, you can use the Buffer class to encode and decode Base64 data without the need for the btoa() and atob() functions. I’m glad that you found this article to Feb 2, 2024 · In this short article, we’ll learn how to convert strings or text into base64 in Node. toString('base64'); Jul 31, 2023 · Convert MD5 string to base64 in Node. Jan 29, 2013 · As of Node. 1. What's left to do is decode the image string and save it as image. var leKey = path+'/'+file; var params = {. btoa() is supported in all modern browsers and Node. It walks you from manual to the terminal to (simple and complex) Nodejs file encoding. text(); This assumes that the stream emits Uint8Array chunks. (API cannot work with XML that is not well formatted) Therefore, I need some help converting my XML Doc variable into Base64 (instead of my XML string) using Javascript. from() method. base64 roughly takes 33% more bits than its binary equivalent. Optionally, the object can also include a contentType string and knownLength integer. log( base64 Jun 15, 2022 · The Node. To transform that buffer instance into a string that can be used in JSON. Explanation. May 23, 2022 · It is a Data-URL in which the data part is provided in form of a Base64 encoded string. from(base64Str, 'base64'); Buffer 转 Base64 const base64Str = buffer. Each Base64 digit represents exactly 6 bits of data. 先获取 arrayBuffer 后转换 Jan 18, 2024 · In Node. Latest version: 1. 0 using the constructor method has been deprecated and the following method should instead be used to construct a new buffer from a base64 encoded string: var b64string = /* whatever */; var buf = Buffer. getBytes("image")); System. Encode each line separately (useful for when you have multiple Jan 8, 2016 · Finally, we upload this base64 string using a Key-Value insert operation. convert base64 to image in nodejs. getEncoder(). readFile(attachment, function(err, data) {. 3 it is written in TypeScript. 0. auth’ function, and the sessionID sent in the Multer form data, we know the user ID of the user who uploaded the image. Then on the nodejs server you can use Buffer directly: const b64 = "SGVsbG8sIFdvcmxkIQ=="; const fileDataProcessed = Buffer. from('username:password', 'utf8'). from(someBase64String, 'base64'); The send request fails if the base 64 string is badly formed. Here's my code: var base64data; fs. digest('base64'); Above worked for me too. 3. Converting the buffer into a readable stream. js is via the built-in Bufferclass. Similarly, we can decode a base64 encoding to a string like this. name, 'base64'); fs. toString('base64') will convert the raw binary data in the buffer to a base64 representation of the data. Here are the two variables: Aug 13, 2017 · I think I understand what Daniel wants, although I couldn't answer for this question. I guess some control characters do not get serialized to a native string properly. I thought I had it working but it attaches a 1K file that isn't exactly what I was looking for. Let’s say you have a string, "Hello World!", and wish to encode it to Base64. js users: const myBuffer = Buffer. 0. The method to achieve this has evolved over different Node. How to make blob or File in NodeJs from base64 string. If you were to provide an example of the encoded data that doesn't work, that would make it easier to answer, rather than speculate. Newline separator (for the "encode each line separately" and "split lines into chunks" functions). I'm getting what looks to be a utf-8 byte array, but have not been able to find a way to verify. I made with the multer library getting the file and then transforming it to base64 Jul 17, 2014 · How to achieve "Base64 encoded SHA-1 hash of a string" in Nodejs. For binary-to-text encodings, the naming convention is reversed: Converting a Buffer into a string is typically referred to as encoding, and converting a string into a Buffer as decoding. btoa() methods, and according to their documentation should not be used in new code. May 1, 2018 · In my code I have converted data from a JSON Model into XML. Destination character set for text files. I recommend you to check this out: Upload base64 image with Ajax Yesterday I did a deep night coding session and created a small node. Here's an example: Apr 7, 2020 · To convert a string into a Base64 encoded string, we first create a buffer from the given string using the Buffer. toString('base64') or. Feb 5, 2020 · But it is not advised to send an image as base64 string. A large number of Node. parse the code needs to invoke Buffer. js 14 was EOL in April 2023, you should use native btoa() to convert strings to base64, unless you need to support older browsers or older Dec 8, 2020 · The easiest way to encode a string to base64 in Node. from(base64str, 'base64') // get the tensor const t = tf. out. Start using is-base64 in your project by running `npm i is-base64`. js HTTP Module Node. In the code below, we are going to create an MD5 hash using the default crypto module and then we use Buffer. toString('hex') edited Aug 15, 2018 at 18:00. createServer(function(req, res) {. May 16, 2012 · A very modern way of doing this is to convert the Node. base64data = new Buffer(data). This only works if base64encoded is a string. from(string, "utf16le"); As you can see from that For Node. Buffer objects are utilized to represent a fixed-length sequence of bytes. js. decode(uint8array); edited May 30, 2018 at 13:20. I'm trying to decode a base64 string representing an image stored in a db. // plain-text string const str = 'This will be encoded in base64'; // create a buffer const buff = Buffer. from(base64encoded, 'base64'). from("aGkgcmVhZGVycw==","base64");const str = buff. In particular, using the following code: var img = new Buffer(b64, 'base64'). from(str, 'base64'). Without 'base64' unzip would complain about missing or incorrect headers. 24. js v5. js, converting an image URL to Base64 can be achieved using the request module along with the built-in Buffer class. js application I decode base64 encoded images using the following line of code: const fileDataDecoded = Buffer. replace(/\//g, '_'). answered Feb 13, 2018 at 15:29. res. Note that if you are compressing to a network or a file stream - you shouldn't need 'base64'. Thanks. Tim. payload to and from base64 Mar 11, 2024 · In Node. We can create an array of byte values by applying this using the . js core Buffer API allows base64 encoding for cases like Basic authentication. Quick solution: Encoding In this example, we create a B Mar 24, 2023 · Converting Base64 to PNG with Node. toWeb(stream)). from(hexString, 'hex'). You need to first convert your string into Buffer before saving it as a real image otherwise, you're going to run into issues. const buff = Buffer. How to decode base64-encoded json object string in node js. from(JSON. Encoding to Base64 To encode data to Base64, you'll need to create a Buffer object and then convert it to a Base64 string: Feb 13, 2012 · Additional note on the warning @TS gave: NodeJS is the engine which, for certain inputs, will return percent-encoded strings rather than base64. Given that Node. Based on unique secret and unique message (generally date-time is used) a unique hash is created. decodeImage(b) If other properties/values are not sent along the request, it would be best to send directly the image as binary in a post request or in a websocket. Form stream I am able to create an image so there is no way the stream is corrupted. js modules. js v6. toString('ascii'); I get a similar binary representation, except for the first bytes. js, do the following instead: Buffer. This library should be used with current versions of the Node. from(string, "utf8"); const utf16_buffer = Buffer. The legacy version with Node. Buffer. Mar 10, 2023 · Here's how to do Base64 encoding and decoding using Buffer in Node. I am receiving a base64 encoded image from the client (as a screenshot) and would like to upload it to another server using multipart encoding. Using the ‘Session. In that case Convert a base64 encoded string to a base64url encoded string. This check will tell whether str is pure base64 or not. The following example shows the basic use of the See full list on stackabuse. 1 and below, as well as the modern method introduced in Node. const byteCharacters = atob(b64Data); Each character's code point (charCode) will be the value of the byte. toString('binary') const decodedData = Buffer(fileDataProcessed, 'base64') // This is the code that you can now upload to your s3 bucket, or somewhere else. const originalString = 'Hello, this is a string to encode!'; Decoding can be done by creating a Buffer from the encoded string and using toString() to convert it back to the original string. Note: HMAC SHA256 is hash value, it cannot be decoded. There is a lot of answers using atob and btoa but node red does not support it. To encode data, specify it in the Buffer instance and string base64 encoding format, as follows. from('YOUR STRING HERE'). const b = Buffer. mido. The same rule applies to the opposite direction. In your browser’s web developer console, define the string, encode it, and display the encoded string: // Define the string var decodedStringBtoA = 'Hello World!'; // Encode the String var encodedStringBtoA = btoa Source Code: lib/string_decoder. JS to pass along to the PostageApp API as an attachment. getBase64Image(url); this. Dec 1, 2023 · This will also output the Base64-encoded version of the string “Hello, World!”. js runtime's long-term stable (LTS May 9, 2019 · Those are not the same thing; although PEM includes base64, it is not only base64. js is by using the buf. These methods offer flexibility and convenience depending on your specific requirements. readFile Feb 20, 2017 · In Node. toString('base64'); //PDF NOT WORKING. If contentType is not included, form. The node:string_decoder module provides an API for decoding Buffer objects into strings in a manner that preserves encoded multi-byte UTF-8 and UTF-16 characters. 20. toUint8Array(pngBase64). So as long as your code is running only in browsers, it appears the method above will always return a base64-encoded string, currently. prototype. replace(/\=+$/, ''); // reverse to original encoding. If you want to convert to string, and then back to buffer, you will need to use an encoding that allows this, for example base64. Mar 9, 2016 · var hmacSignature = crypto. js you don't have Blobs but Buffers. The output of the above code will be a base64 string-. js 中的流格式转换代码。 Base64 转 Buffer const buffer = Buffer. 11. answered Dec 29, 2014 at 20:03. I tried many libraries and solutions provided on SO, but I'm still unable to decode the image correctly. Here's an example of how to perform Base64 encoding: // Convert a string to Base64. const blob = new Blob([dataBuffer], { type: mime}); Blob 转 Buffer. I've tried a lot here Converting it to a buffer. ). – Jul 31, 2023 · Converting SHA-256 to base64 in Node. const url = formatURLs[index]; const base64 = await this. – Oct 14, 2020 · The problem could be the data is not a valid base64-encoded ASCII string. So for your above code you would use this to get your image as Jan 29, 2020 · However if you are only dealing with small files (<1MB) and you dont have to handle traffic from thousands of concurrent requests its probably fine to just download the base64 string and use Buffer. var hexString = Buffer. com Use Base64. js, you may encounter scenarios where you need to decode a Base64 encoded string back into binary data. b64encode(b'\x13\xe3`X\x06J\x0b\x04\xeb\xc4\x82\xbdV\\\x83\xb7') The result was this: b'E+NgWAZKCwTrxIK9VlyDtw==' Then I copied this string without the first character ('b') and I pasted it inside my nodeJs script replacing the old key. Below is the output buffer format that I need to convert Jun 6, 2019 · And on the python shell I converted it to base64 with this command: base64. Apr 25, 2017 · I'm trying to downsample an image in node. js provides a native module called Buffer that can be used May 15, 2021 · Base64Encode. 1. js provides a built-in Buffer class that makes it easy to work with binary data and encoding schemes like Base64. A Node-RED node to encode and decode base64 format messages. createHmac('SHA256', new Buffer(sharedSecret, 'base64')). js Upload Files Node. How to solve the npm ERR! Error: EPERM: operation not permitted How to install a specific version of an Npm package touch is not Dec 18, 2023 · 记录一些 Node. この実行結果は次にのようになります。. Method 1: Using the Buffer Module Jun 1, 2018 · I need to convert user data into a QR Code and show it in the web browser what is the best way to generate QR Code in node js and show it in user browser In addition to uploading assets from a local path or a remote URL, Cloudinary supports uploading assets using the Base64 data URI scheme. Or even better, Base64. write(buf); Apr 9, 2015 · The data explorer you're using thinks the file is UTF-16 bytes encoded into Base-64 (this can easily be verified). A Node-RED node to pack and unpack objects to base64 format. from(base64str, 'base64') to decode it before passing it onwards. Only thing I've found is to dump the already-encoded buffer to a base64, read it back into the The options object should have a key called filename containing a string with the name of the file. byte[] encoded = Base64. Run the following command in your Node-RED user directory - typically ~/. The maximum file size is 192MB. js Intro Node. NodeJs base64 string incorrect. getObject(params). 0 . setState(prevState => ({. from(response,'binary'). stringify(msgBody)). 8. But when I'm getting this base64 and embedding it on the html it says that the file can't be oppened, the same thing happens when I trying to save it as . 0, last published: 4 years ago. js HOME Node. var base64String = Buffer. I have the stream and buffer. Install. response = Buffer. The easiest way to convert a string to base64 is using the global btoa() function as follows. Jan 4, 2019 · 6. writeHead(200, {. to String(‘ base64 ’) Buffer 转 Blob. toString('base64') // 'dXNlcm5hbWU6cGFzc3dvcmQ=' Base64 Decode a Value in Node. under Node. Here, we will cover the recommended approach for Node. Want to learn how to code and make money online? Check out CodingPhase (referral link) In this article, you will learn how to convert a string into base64 in Node. js versions 5. npm install node-red-node-base64. js provides the Buffer object and a base64 encoder and decoder for this task. If you have the Base64 string inside a file, you need to decode it into string first, like: Nodejs serve base64 as Image. . promise(); } Then in the main function you want to handle the promise with a . js If you're working with images in Node. SUVORK5CYII="; // <-- use real base64 string here var buf = Buffer. Finally, the icing on the May 12, 2020 · The base64 string can be converted to binary and then be read as tensor using tf. Decoding a base64-encoded string is also possible using the global Buffer class. You can create a buffer from a base64 string like this: var str = "iAAANS. A string can be converted into a sequence of bytes using the Buffer. The Buffer class is within the global scope in Node. openImage = async (index) => {. Select a file to upload and process, then you can download the encoded result. Encode files to Base64 format. I have same question, but I think we're lack of understanding for file & data on memory. // Uma string qualquer var string = 'DevPleno' // Convertendo para Base64 var emBase64 = btoa( string) console. That means, you can use it directly without any require statement. 需传文件 MIME 格式. js APIs support buffers. In Node. atob() and buf. toString('base64'); // print Base64 string console. toString('base64'); I have also tried the Oct 29, 2008 · To make a Base64 encoded String URL friendly, in JavaScript you could do something like this: // if this is your Base64 encoded string. 'Bucket': "xxx", 'Key': leKey. from is an instance of Buffer. If you have binary data that you need to encode to pass to the client as JSON, you can convert it to base64, a common means on the Internet to represent eight-bit values in solely printable characters. from(body). May 19, 2023 · In this article, we explored three methods to perform Base64 encoding in Node. There are 599 other projects in the npm registry using is-base64. I'm using Sharp npm package. How to read with nodejs? My code: // add to buffer base64 image var encondedImage = new Buffer(image. Construct a new Buffer and pass 'base64' as the second Utilizando Base64 no navegador (Internet Explorer 10 e acima): O código abaixo pode ser copiado e colado dentro do Console do Chrome, para vê-lo executando. If it's already a buffer you get the same encoded value out as what went in. 1 and below. A function that converts the msg. println(new String(encoded)); This is a buffers of a image : [function] that returns from the database The atob function will decode a base64-encoded string into a new string with a character for each byte of the binary data. If you're working in Node or using Browserify, you can use. decode() decodes to UTF-8 string while Base64. js Events Node. So far everything works fine. getBase64Image is async so when calling it in a sync way it will return undefined. It can be accessed using: const { StringDecoder} = require ('node:string_decoder'); copy. toString() can also take other encodings, you can read more about the other supported encodings in the docs. None of these seem to work. You can use TextEncoder and TextDecoder from the Encoding standard, which is polyfilled by the stringencoding library, to convert string to and from ArrayBuffers: var uint8array = new TextEncoder(). io – A simple web tool to help you in encoding your string data into base64 format and decode base64 data into plain text. toString('utf8'); answered Dec 2, 2016 at 9:56. js, and you want the bytes that make up that string in a particular encoding, you use: const string = "Johan Öbert"; const utf8_buffer = Buffer. from() method, which takes the Apr 15, 2024 · btoa() takes a string and encodes it to Base64. js URL Module Node. toString('base64') That will give you back the base64 version. Jun 3, 2023 · Encoding and Decoding Base64 in Node. It could be UTF-8 encoded, then base64 encoded. read()) to send it to the other library. Below is the code I'm attempting to use with the base 64 string replaced for clarity. js also supports the following binary-to-text encodings. Sep 3, 2017 · I write function that convert Base64 String to Base64 Hex String and now it is correct converted to display as BLOB png imagebut problem is when i open field in DB Browser for SQLite it writes this converted value as Text, and must be written as binary (so that the image will be recognized and displayed when i choose Image in DB Browser for SQLIteso the question is how can i insert 9. userID’ as we can see the ‘/api/uploadAttempt’ API. This userID, with ‘_picMulterNode’ appended, is used Sep 10, 2015 · It will just ignore non-base64 characters. Jan 14, 2019 · return s3. Aug 6, 2011 · 114. toString('base64') === str. Base64 is used to represent binary data in an ASCII string format by translating it into a radix-64 representation. js, there may be times when you need to convert a Base64 encoded string to a PNG image file. js is to use the built-in Buffer object. bw iv kw zy si qw go nz yh bj