js with Unicode support. Stack Overflow. update(yourMessage). Nov 18, 2021 · Base64 Encode a Value in Node. Start using url-safe-base64 in your project by running `npm i url-safe-base64`. Note: HMAC SHA256 is hash value, it cannot be decoded. encodeURI Method Apr 7, 2020 · Let us look at the below examples that explain how to use the Buffer object to perform Base64 encoding and decoding in a Node. Additional note on the warning @TS gave: NodeJS is the engine which, for certain inputs, will return percent-encoded strings rather than base64. toString(CryptoJS. readFile(attachment, function(err, data) {. This is fine, and my form data all comes out correct, except somehow my image is being corrupted, and I'm not sure how to decode this properly to avoid this. The same rule applies to the opposite direction. com . If you need to handle signed big ints look at the two articles on converting to and from hex below, that's where all of that is. atob() decodes to bytes, which is compatible to browser built-in atob() (Which is absent in node. If you print result. The buffer class can be used to encode a string into a series of bytes. JS to pass along to the PostageApp API as an attachment. The Buffer. from(await blob. js using the Buffer class. Data truncation may occur when decoding strings that do not exclusively consist of an even number of See full list on stackabuse. post('/upload', function (req, res) {. 5, last published: 4 years ago. This function takes a base64-encoded string (the input parameter) and decodes it. Skip to main content. what's the goal: client sends a ca Dec 13, 2023 · This article is aimed to guide you through the process of Base64 encoding in Node. 75. Yesterday I did a deep night coding session and created a small node. NodeJS converting image stream to base64 gives invalid data. Understanding Nodejs base64 encode starts by knowing how the runtime environment handles data transfer. js using Axios; Note: if you need to convert an Image URL to base64, click on the following subheading: Convert an Image URL to base64 in Node. 11. To convert a string into a Base64 encoded string, we first create a buffer from the given string using the Buffer. The ical-generator package's calendar class doesn't provide a toString() which takes the format as the parameter, like Buffer. btoa() method to encode and transmit data which may otherwise cause communication problems, then transmit it and use the atob() method to decode the data again. Jul 20, 2023 · Steps of Base64 encoding: First, each character in the input text is converted to its corresponding ASCII value. If it's already a buffer you get the same encoded value out as what went in. js; new Buffer('Chris'). from method. txt files, it successfully logs the result in the console. The Buffer class can be used to manipulate streams of binary data in Node. js v5. The file that must contain the new image is written as base64 instead of a jpg file. The toString () method is used. Convert base64 audio to file. js is via the built-in Buffer class. Meet Base64 Decode and Encode, a simple online tool that does exactly what it says: decodes from Base64 encoding as well as encodes into it quickly and easily. Start using nodejs-base64-converter in your project by running `npm i nodejs-base64-converter`. toString('base64') and to decode it just use. When encoding a Buffer to a string, this encoding will omit padding. from(base64encoded, 'base64'). 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 Sep 7, 2022 · Although you can encode data on the terminal, using a runtime environment or a programming language and a code editor simplifies handling complex data. Base58. hex: Encode each byte as two hexadecimal characters. stringify(stringObject)}`); const encodedAccessToken = bufferString. Viewed 4k times 4 First time posting on May 9, 2020 · buffer. toString('base64'); //PDF NOT WORKING. common. EDIT: In order to actually get the 'right' result on the command line, you could output an actual binary sha256 digest and encode that, instead: $ echo -n "hello world"| openssl sha256 -binary | base64 -. Server send an raw image in axios, how to convert it to base64 or other way to use this image. log(new Buffer(text, 'binary'). Aug 11, 2018 · How to encoded files in base64 in nodejs after getting details from client-side using multer. 0, last published: 3 years ago. from (str); // 3: convert buffer to Base64-encoded string const encoded Node. js without the use of an ecosystem library. Buffer. Nodejs base64 encode with examples. The size of the Buffer is established when it is created and cannot be modified. js is via the built-in Bufferclass. Nov 17, 2018 · const file = encodeBase64(__dirname + "/temp/template. Start using nodejs-base64 in your project by running `npm i nodejs-base64`. 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. Base64 encoding schemes are commonly used when there is a need to encode binary data, especially I want to base64 encode this image on the Node server so I can view the image on the front end. Node. Dec 25, 2023 · Conversely, the atob() method decodes a string of data which has been encoded using base-64 encoding. from(b64string, 'base64'); // Ta-da For Node. from () method takes a string as an input and converts it into Base64. js不支持用于Base64编码的标准JavaScript函数，例如atob()和btoa Aug 16, 2021 · Node js Base64 Encoding Decoding - The buffer object can be encoded and decoded into Base64 string. js can be used to convert a string to a series of bytes. There are 12 other projects in the npm registry using nodejs-base64-encode. 20. atob(pngBase64) instead. digest('base64'); Above worked for me too. The problem happens when some time in node router Base64 decode removes 'r' char from web page URL. log(result) return res. By passing `'base64'` as the encoding, we can easily perform Base64 encoding. length - offset - in this case, it would be SLUGID_SIZE. When I decode it, it becomes a regular string and I have to parse it myself, and I wonder whether it is possible to Jan 30, 2019 · Encoding a file to base 64 Nodejs. For example, you can achieve this in the following way: // 2: convert encoded string to buffer const binaryStrBuffer = Buffer. The base64. Jun 9, 2017 · I cannot send base 64 url encoded data to my nodejs backend. About. from(string, encoding) method and specifying the encoding to be base64 if converting from base64 to utf8. Base64is a binary-to-textencoding scheme. 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 Sep 1, 2014 · echo Chris | openssl base64 # Q2hyaXMK Node. Sep 10, 2015 · My understanding from the question is that the input is a string, and the goal is to tell if it is base64 encoded or not. Aug 30, 2017 · 226 1 6. js; Convert an Image URL to base64 in Node. from(someBase64String, 'base64'); myBuffer will be of type Buffer which is a subclass of Uint8Array. That I want is get base64 string from this awesome tools. e. Rajeev Singh1mins. Based on unique secret and unique message (generally date-time is used) a unique hash is created. js/JS (well actually CoffeeScript, but CoffeeScript is just JavaScript so lets say JS) app. js. The alternative Base64 encoding called Base64url simply replaces those 2 troublesome characters with two safe characters. . Oct 10, 2017 · I want to implement a similar tool in NodeJS. toString("utf8"); console. decode() function is designed to be fully compatible with atob() as described in the And here are the corresponding Java-side tests (for Java8 native java. So as long as your code is running only in browsers, it appears the method above will always return a base64-encoded string, currently. URL Encoding. decode() decodes to UTF-8 string while Base64. Similarly, we can decode a base64 encoding to a string like this. In this article, you'll learn how to Base64 Encode a String in Node. Jul 21, 2020 · Node. You can use this method to encode data which may otherwise cause communication problems, transmit it, then use the Window. toString('base64'); The generated string can now be decoded anywhere. That means, you can use it directly without any require statement. from () method to create a buffer from the hash string and then encode the string in base-64. js users: const myBuffer = Buffer. from () method that accepts the string to be converted and the current encoding of the string. js using the Buffer module. Buffer base64 encode a variable, node. js using the Buffer object. Feb 2, 2016 · That is quite different from the actual byte sequence b9, 4d, 27, b9 etc. Dec 9, 2015 · base64url (Node v14+): base64url encoding as specified in RFC 4648, Section 5. Node JS, How to properly 9. 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。. test('fuel') === true as fuel is a perfectly valid encoded base64 string that decodes to ~ç¥. enc. js the string conversions happen using the Buffer. js and does not need to be imported using the require. Is there a way I can encode it in such as way that only my server will be able to decode it? Sep 25, 2019 · Yes I have looked into the npm modules, and there's only csv handler like 'csv' or 'csvtojson'. Let us explore that using Nodejs base64 encode. In browser, however, we use btoa and atob to convert to base64 and vice-versa. toString('base64') Mar 14, 2015 · I want to convert a message like "Hello World" to base58 and then been able to decode it using node. In my personal opinion, base64 and multipart/form-data do not compare pros and cons, but rather have different purposes and characteristics. write() - third argument is not length, it is end offset - no, for write it is a length - see documentation - you could actually do buffer. Apr 9, 2023 · Similar to encoding a base64 string, the easiest way to decode a base64-encoded string in Node. const calStr = cal. Modified 3 years, 2 months ago. You'll just need to convert it to Base 64 like you'd convert any other string. It is commonly used for encoding and transporting data over media incompatible with transferring binary data. This method takes two parameters, a plain-text string, and When downloading i want to decode the text again and display the image. A likely reason for 76 being the default is that Base64 encoding was to provide a way to include binary files in e-mails and Usenet postings which was intended for humans using monitors with 80 characters width. 24. Aug 31, 2022 · 以上のように16進数文字列やbase64を利用する場合は複雑になるので可能な場合はNode. js provides the `Buffer` class, which can be used for handling binary data. Node comes with "batteries included" and allows us to encode to base64 using a core API. 3. Let's look at an example: Apr 15, 2024 · btoa() takes a string and encodes it to Base64. Forget about the client, i am just testing this using postman and nodeJS, so im just worried about the server side. # How to convert an Image to base64 using Node. Base-58 module has the below explanation but I can't exactly understand how to convert my message. In particular, using the following code: var img = new Buffer(b64, 'base64'). This class can handle encoding/decoding base64 for us. from(base64str, 'base64') to decode it before passing it onwards. js v6. const stringToDecode = 'Zm9vYmFy'; const decodedString = atob (stringToDecode); // 'foobar' Compatibility & older Node. js and provide tips and tricks to avoid common errors. You can use the Window. url safe base64 en- and decoding. Base64) then you get the Base64-encoded string of the binary result. First, you'll need to install the request module using npm: The ultimate shortcut to the base64 encode/decode functions. log("HY"); Simple Node Js Package For Encode Decode A Given String. const {base64encode, base64decode } 本文翻译自Base64 Encoding and Decoding in Node. 20. この実行結果は次にのようになります。. To encode special characters in URI components, you should use the encodeURIComponent () method. When you call the toString() function on such an object, you get a Hex-encoded string of that binary object. google. js versions. js, converting an image URL to Base64 can be achieved using the request module along with the built-in Buffer class. It can save synchronously or asynchronously. mido. You want to achieve this using nodemailer. JS - Encoding images in base64 using Buffer. base64 encode/decode methods in nodejs. from () method can create a buffer (binary data) from a given string in a specified encoding. from() method. 1. 624. The output of the above code will be a base64 string-. url. 1. More specifically, the source binary data is taken 6 bits at a time, then this group of 6 bits is mapped to one of 64 unique characters. My provisional code looks like this: data += chunk; console. The return value is in the form of a string containing only characters in the range from U+0000 to U+00FF, each representing a binary byte with values 0x00 to 0xFF. This can be done using the Buffer. 0. This method is suitable for encoding URL components such as query string parameters and not the complete URL. However, the front-end side of my web uses a base64 encoder to encode the csv file first, so the back-end side only receives a string. Jun 3, 2024 · The atob() method of the Window interface decodes a string of data which has been encoded using Base64 encoding. send(result); console. safe. Ask Question Asked 5 years, 11 months ago. toString () method can Dec 14, 2018 · It's been native BigInts all week long, all week strong and today I'm tying it all in a nice pretty bow with the final installment: How to encode BigInts to Base64, and back again. Sep 8, 2018 · const stringObject = { elementA: stringA, elementB: stringB }; const bufferString = new Buffer(`${JSON. console. Resources. The Buffer class is within the global scope in Node. 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 Jul 17, 2014 · How to achieve "Base64 encoded SHA-1 hash of a string" in Nodejs. 8k 15 97 119. What is Base64 Encoding? Base64 is a binary-to-text encoding scheme that is commonly used to encode data, especially when that data needs to be stored and transferred over media that are designed to deal with Mar 9, 2016 · var hmacSignature = crypto. buffer. This module is loaded by default, hence no import is required. Ask Question Asked 3 years, 11 months ago. There are 14 other projects in the npm registry using url-safe-base64. 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. 0 Feb 1, 2020 · Base64 encoding and decoding can be done in Node. BaseEncoding) invoking node. When I attempt this with a docx file, it returns an empty string. Apr 21, 2014 · @CristianTraìna: As far as I can tell, base64 AA== is the expected output for hex 00. Jun 3, 2024 · Window: btoa () method. Moreover, Buffer objects are immutable. Thanks. Legacy Character Encodings Oct 3, 2022 · Decoding a base64 to a string. 'hex': Encode each byte as two hexadecimal characters. I'm trying to decode a base64 string representing an image stored in a db. jsのCryptoを触って暗号化について勉強したことをこの記事にまとめました。 理解に苦しんでいる方が、この記事を読んでなんとなくイメージができるようになれば嬉しいです。 サンプルコードはGitHub🐱で公開しています。 ♻️ 環境. Luckily, both btoa() and atob() are supported in all modern browsers and Node. from('someText'). Jun 27, 2021 · In this article, you'll learn how to encode or decode a URL string and query string parameters in a Node. I use module abse64-image-upload, so at the moment i have this: app. js). 9. In the code below, we are going to create an SHA-256 hash using the default crypto module and then we use Buffer. When creating a Buffer from a string, this encoding will also correctly accept regular base64-encoded strings. 2. , a string in which each character in the string is treated as a byte of binary data). js process and proving correctness: @Test public void testJ8() throws IOException { String input = "This is some UTF8 test data, which also includes some characters " + "outside the 0. Here's an example: Jan 8, 2019 · For NodeJS (with node-fetch), you can get a buffer from blob using Buffer. The converted bytes can be changed again into String. Every other function returns the same. Jul 31, 2023 · Converting SHA-256 to base64 in Node. In this article you will learn the following: Encode a string to base64; Decoding from base64 to a unicode string; What is the Buffer API anyway? Jun 3, 2023 · We will also briefly discuss how to perform these operations in Node. encode(a Buffer or Uint8Array) returns a String Base58. Convert base64 image data to png? 5. Usage. Earn 10 reputation (not counting the ) in order to answer this question. js since version 16. Edit: console. g. TypeScript types available. 0, last published: 4 years ago. Here's my code: var base64data; fs. Jan 29, 2013 · As of Node. 다음은 Node. util. Functions which accept odd-length hex input seem to pad the hex digits, so for example : base64ToHex(hexToBase64('000')) // => "00 00" . Here’s a code snippet translating a string in UTF8 encoding to base64: Nov 24, 2013 · It does not make sense to "convert" a string to UTF-8. js application. createHmac('SHA256', new Buffer(sharedSecret, 'base64')). 0, last published: a year ago. However, you don't need to get a blob from node-fetch. – Jaromanda X. Jan 30, 2021 · So, I'm trying to pass an image to a Node Lambda through API Gateway and this is automatically base64 encoded. 16. from(b64, 'base64'). The output looks different to what GNU base64 offers. In computer programming, Base64 is a group of binary-to-text encoding schemes that transforms binary data into a sequence of printable characters, limited to a set of 64 unique characters. It includes a method called `toString()`, which accepts an optional encoding parameter. There are 6 other projects in the npm registry using nodejs-base64-converter. 변환 중에 필요한 인코딩은 이 절차에서 허용되는 매개변수를 통해 지정됩니다. log(str);// hi readers. io. Here is the relevant part of my code: Apr 6, 2021 · const base64data = Buffer. uU0nuZNNPgilLlLX2n2r+sSE7+N6U4DukIj3rOLvzek=. Having a 76-character width as default made that usecase easier. write(slugId2, SLUGID_SIZE, 'base64'); - because the length defaults to buffer. decode(a String) returns a Buffer I'm trying to encode an image using base64 in Node. Let’s say you have a string, "Hello World!", and wish to encode it to Base64. Base64 encode a javascript object. toString('base64') // Q2hyaXM= I'm trying to use the passport-http library for Basic authentication, and it appears to be expecting encoded data in the format of #1. How to solve the npm ERR! Error: EPERM: operation not permitted How to install a specific version of an Npm package touch is not Oct 22, 2011 · @swateek Works for me: base64regex. Then using the Base64 table, we convert the 6-bit binary values into Feb 25, 2021 · The next step is to convert this PDF binary to base64 encoded string. Construct a new Buffer and pass 'base64' as the second You can decode any Base64 encoded data using the built-in Buffer API provided by Node. Dec 2, 2016 · var utf8encoded = Buffer. My question is related to this question OpenCV cv::Mat to std::ifstream for base64 encoding but instead of doing this in C++ Id like to do it on Node. atob You can encode a string to base64 in Node. Latest version: 1. js is a JavaScript runtime built on Chrome's V8 JavaScript engine, you can use JavaScript methods such as encodeURI() and encodeURIComponent() to encode a URL. In Node. Laylah-Walsh. Then on the nodejs server you can use Buffer directly: const b64 = "SGVsbG8sIFdvcmxkIQ=="; const fileDataProcessed = Buffer. js가 지원하는 추가적인 binary-to-text 인코딩입니다. In this article, we would like to show you how to encode and decode Base64 in TypeScript. 255 range: . Feb 13, 2018 · NodeJS write base64 encoded image to file. Use Base64. jsのBufferを利用した方がいいでしょう。 またはサードパーティライブラリのjs-base64を利用する手段もあります。 May 19, 2023 · Node. Taking a Base64 Encoded Image and Sending it with ExpressJS as an Image. For example, you can encode, transmit, and decode control characters such as ASCII values 0 through 31. Apr 5, 2024 · Convert an Image URL to base64 in Node. , by passing an extra flag, or replacing the string argument with an object that has a string and a format field, or having two Jun 25, 2020 · Base64 encoding and decoding can be done in Node. 0. from(body). So, plus to minus, and the forward slash "lies down" to become an underscore. The btoa() method of the Window interface creates a Base64 -encoded ASCII string from a binary string (i. For Node. from(string, "utf8"); const utf16_buffer = Buffer. 공백 Jun 30, 2016 · You misunderstood the Buffer(str, [encoding]) constructor, the encoding tells the constructor what encoding was used to create str, or what encoding the constructor should use to decode str into a byte array. 3. How do I transfer base64 data into a readable image stream without saving locally. You have already been able to get and send emails using nodemailer with Gmail API. const encoded = new Buffer. Base64 인코딩은 문자열에서 버퍼를 구성할 때 RFC 4648 섹션 5 에 설명된 URL 및 파일 이름 안전 알파벳을 허용합니다. Quick solution: Encoding In this example, we create a B Jul 1, 2012 · I want get a image from url and encode base64 that image by nodejs, then show that image by base64 encode, but this code is incorrect. this code save incorrect png file. Pass the value you want to base64-encode as the first argument and the current encoding as the second argument. Unfortunately, Uint8Array is NOT an ArrayBuffer as the OP was asking for. Start using nodejs-base64-encode in your project by running `npm i nodejs-base64-encode`. from(calStr). Base64. Only thing I've found is to dump the already-encoded buffer to a base64, read it back into the Which is a Base64-encoded 1x1 transparent PNG, DO NOT USE Base64. The ASCII values are converted into their 8-bit binary equivalent. Feb 15, 2021 · Simply put, it takes a data URL with a Base64 encoded image and saves the image to your file system. Modified 2 years ago. This only works if base64encoded is a string. Latest version: 2. I can successfully convert ASCII text but not binary content. base64data = new Buffer(data). from(base64data, 'base64'). js Decompress base64 encoded zipped string with gzip. It represents binary data in a printable ASCIIstring format by translating it into a radix-64 representation. Base64 Encoding. arrayBuffer());. toString('base64'); Aug 19, 2023 · In Node. toString('binary') const decodedData = Buffer(fileDataProcessed, 'base64') // This is the code that you can now upload to your s3 bucket, or somewhere else. js is to use the built-in Buffer object. 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 4. There are 51 other projects in the npm registry using nodejs-base64. You can just get a buffer directly from the response. Base64 encode your data without hassles or decode it into a human-readable format. What is Base64 Encoding? Base64 encoding is a technique to convert binary data into ASCII text format, which consists of a set of 64 different characters (hence the name "Base64"). js应用程序中进行Base64编码和解码。 不幸的是，Node. The simplest way to convert a string to Base64 encoded format in Node. The 8-bit binary data is broken into 4 segments of 6-bits each creating a sequence of 24 bits. If you take a and directly encode it to Base64, then it is probably assumed that a is already a string (e. The ultimate shortcut to the base64 encode/decode functions. Dec 8, 2020 · The easiest way to encode a string to base64 in Node. To Dec 18, 2020 · For example, if you need to put binary data in a text document like XML, you need to characterize it and go through an encoding method like base64. Namely, a "+" is replaced with a "-" and a "/" is replaced with a "_". You want to send an email with an attachment file. If you have a Unicode string in Node. docx"); This results into an empty string. I tried many libraries and solutions provided on SO, but I'm still unable to decode the image correctly. PDF file. js Rajeev Singh 1 mins. const buff = Buffer. NodeJS has a built-in class called Buffer. Note: In the presented solution, we use the Buffer class, which has a global scope in Node. I suspect you're looking for a function to tell if you're looking at an encoded or vanilla payload … but such a (non-AI based and fully deterministic) function does not exist, though i'd be delighted to be proven wrong. js supports data encoding via the global Buffer class. from (encodedStr, 'base64' ); // 3: convert buffer to string const decoded Jul 15, 2022 · Node. 1 and below. 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. Buffer objects are similar to arrays of integers from 0 to 255. No need to more libs 🎉 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. In this short article, we would like to show how to encode text to base64 and back ( decode base64) in Node. toString('ascii'); I get a similar binary representation, except for the first bytes. Internally, a Buffer object is an immutable array of integers. log(error) With images and . Since Node. encoding socket: function . js: v12. I tried doing a . from(string, "utf16le"); As you can see from that Jul 1, 2011 · encodeURIComponent. You can create a buffer instance using the Buffer. decode(pngBase64). from("aGkgcmVhZGVycw==","base64");const str = buff. Basically the Buffer class represents byte streams, it's only when you convert it from/to strings that encoding comes into context. Base64 Encoding in Node. toString('utf8'); answered Dec 2, 2016 at 9:56. Base64 is a widely used binary-to-text encoding scheme that transforms binary data into an equivalent ASCII character set by translating it into a radix-64 representation. There are a lot of places where base64url encoding / decoding are already The ultimate shortcut for the base64 encode/decode functions in Node. When I try to parse to base64 the same pdf but this time from a downloaded pdf, the base64 code when Jul 9, 2019 · I was also trying to decode a large image. toString() const calB64 = Buffer. I thought I had it working but it attaches a 1K file that isn't exactly what I was looking for. It also has two helper functions, one to get the file extension of the image, and the other to separate the Base64 encoding from the data: scheme prefix. The Buffer class implements the Uint8Array API and provides Jul 3, 2017 · Use 0 to disable line wrapping. under Node. UTF-8 encoded What is Base64 Encoding. 在上一篇文章中，我们研究了如何在Java和JavaScript中对Base64进行字符串编码和解码。今天，您将学习如何在Node. toString('base64') on the matrices values but this didnt work. Share. If the question is really whether the caller has already base64-encoded it or not, then only the caller can unambiguously indicate that (e. You have the base64 data, and you want to send it as the attachment file. I’m glad that you found this article to Feb 19, 2020 · Base64 encoding and decoding in JavaScript. Encoding the original string to base64: The Buffer class in Node. 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 . This is a problem for me as all my tests rely on Node for generating encoded data (mocha, supertest). 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. Base64 and for Guava's com. toString('base64')); Usage: $ cat file. from documentation btoa on MDN Jun 15, 2017 · I have google chrome extension which scraps some simple data from opened web page like title, URL, image and then I am doing encoding of all these data and sending them to my nodejs app route. gpg | node base64. js; The first 3 subheadings convert a local image file to base64. ze ie ce vz of ym cz mg ur lj