Text to base64: Encode and convert base64 online. 7 base64. To encode DOMStrings, you need to convert the UTF-16 DOMStrings to UTF-8 array About. Here we will create a gfg. 6+, Internet Explorer 10+, Safari 6+). It is supported in modern browsers and can be used to encode strings as follows: Dec 2, 2016 · var utf8encoded = Buffer. Why are you base-64 encoding between browser and server, and trying to accomplish this in the browser? Seems like if your trying to secure the data, SSL would be much easier as it encrypts all of the HTTP data (including files) over the wire. I was referring to the specific extra code in the Base64 object from the referenced SO answer. atob( String ) Parameter (String): This parameter is required. In this tutorial, you will learn how to encode a string to Base64 encoded format. Javascript has a built-in function named btoa() that you can use to perform Base64 encoding. io is a simple and easy-to-use online tool to encode any binary or text data to Base64 encoded format. I would like to do this in javascript without making an ajax call to the server if possible. Jan 26, 2013 at 10:27. The base64 strings are user input, they will be copy and pasted from an email, so they're not there when the page is loaded. I assume the javascript encoding is correct because its able to decode it again without error, and it's the original string with non english characters. If this doesn't matter to you (i. something that worked here for me was these two simple functions: b64encode = function(x) {. – user663031. us。多吉云是本站作者所在团队开发并运营的公有云平台，为广大个人和企业开发者提供视频云点播、对象存储、融合 CDN 等互联网基础产品，上线至今已稳定运营 5 年时间。 Alternative Encoding Methods. 2. The Base64 decoding process is very much similar to the encoding process. Now base64. The maximum file size is 192MB. So in javascript (updated with encoding URI): var myStr = "I am the string to encode"; var token = encodeURIComponent(window. Of course, we can use new Image () to draw a canvas and using the toDataURL () method to get the Base64 string. 7. 3333 times the actual size of your original data. 28. You can try something like that. Brief History. But it does not work if is "binary" like content, in our case the content of a pdf Feb 5, 2018 · base 64 encoding in javascript. However, the btoa() function doesn't recognize DOMStrings which are 16-bit encoded. In this article, you will be introduced to the btoa and atob JavaScript functions that are available in modern web browsers. Feb 23, 2017 · This is my go to solution to convert an Base64 type image to binary file. – Nov 18, 2009 · Edit: for some downvoting nitpickers out here: I did NOT say that URLEncoder#encode() does the Base64 encoding. 感谢大家使用 Base64. One of the primary purposes is to have aesthetically pleasing SHA1 hashes. toString('base64'); Encode files to Base64 format. Base64 encoding is a method of converting binary or text data into a plain text string of ASCII As well as HTML and CSS, JavaScript is most often used in web development (of course, it is not only limited to this). The encoder maps the input to a set of characters in the A-Za-z0-9+/ character set. Affine cipher. const asciiString = 'hello'; // This will work. Apr 27, 2020 · Here we have 3 strings - Original, Base64 and Decoded accordingly. Below I provide a simple example which is supported by most popular browsers (Chrome 6+, Edge 12+, Firefox 3. Jun 3, 2024 · Window: btoa () method. There are two built-in functions in JavaScript for encoding and decoding raw binary data into Base64 strings. You can use this method to encode data which may otherwise cause communication problems, transmit it, then use the Window. In JavaScript there are two functions respectively for decoding and encoding base64 strings: atob () btoa () The atob () function decodes a string of data which has been encoded using base-64 encoding. Jul 18, 2013 · Function convert image to base64 using jquery (you can convert to vanila js). readFile Jul 15, 2014 · 0. const byteCharacters = atob(b64Data); Each character's code point (charCode) will be the value of the byte. Encode each line separately (useful for when you have multiple This tool allows loading the Plain data URL, which loads plain data encodes to base64 text. Let’s use a simple example to demonstrate the process of Base64 decoding with the atob () function. There are 1700 other projects in the npm registry using base-64. Javascript has a built-in function named atob() which performs Base64 decoding. Oct 10, 2022 at 16:09. The following shows a quick example: // A really plain string that is just code points below 128. 'ucs2' - 2-bytes, little endian encoded Unicode characters. safe. btoa (): This function uses the A-Za-z0-9+/= characters to encode the string in Base64. Start using url-safe-base64 in your project by running `npm i url-safe-base64`. If you need more features, for better customization check the Aug 27, 2020 · Web browsers provide a variety of data primitives that web developers use to manage, manipulate, and store data – from plain text, to files, images, videos and more. To encode data to Base64 in JavaScript, use the function btoa: var b64 = btoa ('guru'); console. No código a seguir, temos dois elementos div dentro dos quais exibiremos a string codificada e decodificada. Let's see how we can actually use base64 by uploading an HTML canvas image to the server. The atob function will decode a base64-encoded string into a new string with a character for each byte of the binary data. Nov 30, 2023 · Base64 is a method of encoding binary data as ASCII characters, which are composed of 64 symbols: A-Z, a-z, 0-9, + and /. How to read with nodejs? My code: // add to buffer base64 image var encondedImage = new Buffer(image. The btoa() method of the Window interface creates a Base64 -encoded ASCII string from a binary string (i. There are 14 other projects in the npm registry using url-safe-base64. Please read answers, do not scan answers. ts then base64. Chrome Developer Tools; Curl Import Tools; URL-based Encoding; What is Basic Authentication? Basic Authentication is a common method of authenticating to an API. from(sha256. Download or copy the result from the “Base64” field. Only thing I've found is to dump the already-encoded buffer to a base64, read it back into the Base64 is the most popular binary-to-text algorithm used to convert data as plain text in order to prevent data corruption during transmission between different storage mediums. 'utf8' - Multi byte encoded Unicode characters. Here, we will add the base64 string to the function getBase64Img(). js/JS (well actually CoffeeScript, but CoffeeScript is just JavaScript so lets say JS) app. return base64. I can create Base64-encoded jpeg or png images in Javascript, but I could not find any way or sample code to create a Base64-encoded string from a PDF file. answered May 12, 2013 at 15:11. Base64Encoder. Here is an example of how to use atob () to decode Base64 data: const base64String = 'SGVsbG8gV29ybGQh'; // Base64-encoded string. Hope it help to you! Usage: input is your nameId input has file image Jun 3, 2023 · Encoding Base64 in JavaScript Using the btoa() Function. Both atob() and btoa() work on strings. For server-side JavaScript (Node), you can use Buffer s to decode. To retrieve only the Base64 encoded string, first remove data:/;base64, from the result. from(base64encoded, 'base64'). If necessary, select the desired output format. // its like application/pdf or application/msword or image/jpeg or // image/png and so on // base64Data: Its your actual base64 data // fileName: Its the file name of the file which will be downloaded. Base64 Encoder Online works well on Windows, MAC, Linux, Chrome, Firefox, Edge, and Safari. Base 32 is between hexadecimal notation and Base 64 encoding. image : Titanium. Decoding not working with Base64. May 28, 2024 · This method decodes a base-64 encoded string, which has been encoded by the btoa () method. getBase64Image is async so when calling it in a sync way it will return undefined. It just does URL encoding the same way as Javascript's escape() function does. EncodeToString([]byte(str)) Sep 13, 2016 · Needing to convert a Base64 string to Hexadecimal with javascript. If you need the reverse process, check the Base64 to PDF online tool. It's intended to be a human-friendly -- you don't have to worry about punctuation, capitalization, or letters/numbers that are easy to confuse, making it easier to transmit in handwriting or over the phone. test('fuel') === true as fuel is a perfectly valid encoded base64 string that decodes to ~ç¥. Feb 2, 2024 · Use the Image() Constructor and the src Property to Convert Base64 to Image in JavaScript. url safe base64 en- and decoding. CalliCoder. JSON encode/decode base64 encode/decode in JavaScript. openImage = async (index) => {. 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. How Does Base64 Work? Converting data to base64 is a multi-step process. If I do console. Understanding Base64 Encoding. setState(prevState => ({. //Convert base64 to file. js is ES5-compatible again (hence IE11-compatible). Assume you have the following Base64-encoded string: “ SGVsbG8sIFdvcmxkIQ== “, which corresponds to the original string “ Hello, World! ” You may use the atob () method to decode this Base64 Base64 is commonly used in a number of applications including email via MIME, and storing complex data in XML. 3 it is written in TypeScript. This is the basics of encoding and decoding base64 in JavaScript. Javascript provides a built-in function named btoa () (binary-to-ASCII) to perform Base64 encoding. 3. Using this formula, be aware that it doesn't give the padded length. php May 4, 2017 · 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. I need to encode a PDF file to Base64 with Javascript. Given that Node. 'base64' - Base64 string encoding. 0 . The term Base64 originates from a specific MIME content transfer encoding. O btoa() pega uma string e a codifica em Base64, e atob() pega uma string codificada e a decodifica. mido. The atob () function takes a Base64-encoded string as input and returns the decoded binary data as a string. Learn how to decode a Base64 encoded data back to normal text in Javascript. getBase64Image(url); this. This encoding method is very fast, and will strip the high bit if set. Select a file to upload and process, then you can download the encoded result. btoa(myStr)); btoa example. let arr = dataurl. base64decode("iVBORw0KGgoAAAANS"), }); This converts a base64 string to a blob, which can be used in an ImageView. drawImage(this, 0, 0, canvas. According to the equation, we expect the output length to be (6 bytes / 3 bytes) * 4 characters = 8 characters. This example uses the built-in FileReader readDataURL () to do the conversion to base64 encoding. toString('utf8'); answered Dec 2, 2016 at 9:56. from(b64, 'base64'). 0. We can create an array of byte values by applying this using the . currentImage: index, currentImagebase64: base64. I will show you some practical examples how to decode Base64 to PDF using the atob function and get some information about it. This only works if base64encoded is a string. Then in PHP, after you retrieve the request: Jul 31, 2012 · We encode the string into the bytes using UTF8 representation, which can represent all the possible string characters. In addition, it is often used to embed binary data into text documents such as HTML, CSS, JavaScript, or XML. createImageView({. Let’s first encode a simple String: String originalInput = "test input" ; String encodedString = Base64. It is commonly used for encoding and transporting data over media incompatible with transferring binary data. Select a local file from your computer. I found those links interesting, but they didt'n help me: Aug 4, 2019 · 3. May 12, 2010 · Some browsers such as Firefox, Chrome, Safari, Opera and IE10+ can handle Base64 natively. Each of the 6-bit binary sequences from 0 to 63 are assigned a Base64 alphabet. Base64 Decoding in Javascript Rajeev Singh 2 mins. Feb 15, 2024 · Encoding and Decoding a String to Base64 in JavaScript. The encoding process is very fast, once the PDF has been encoded, you can view or download the resulting Base64 data. It specifies the string which has already been encoded by the btoa () method. Canvas. The btoa() method creates a base-64 encoded string from a String object in which each character in the string is treated as a byte of binary data. Is it there any solution using a HTML5 canvas? Thanks. The inverse transformation is achieved by using the function atob . export const dataType64toFile = (dataurl, filename = "NewFile") => {. Aug 11, 2023 · Encode base64 in JavaScript. Destination character set for text files. Try roundtripping this, and you'll see it works fine: decodeURIComponent(escape(unescape(encodeURIComponent("東京")))) "東京", even thought the intermediate result looks like funny characters--because it IS funny characters. You can copy the encoded data by clicking in the output text areas. Dec 18, 2023 · Approach. getBytes()); May 30, 2018 · For code running using Node. Example: var base64Value = "oAAABTUAAg==" Need conversion method Output (Decoded data (hexadecimal)) A0000005350002 I Jan 20, 2014 · Good call. base64decode: var imageFromBase64 = Titanium. The extra 65th character (=) is used for padding. To sum up the other two posts, here are two simple functions to encode/decode Base64 strings with Go: // Dont forget to import "encoding/base64"! func base64Encode(str string) string {. Example 1: This examples encodes the string “This is GeeksForGeeks Feb 8, 2019 · The “Text to Base64” converter is a simple encoder tool that allows you to convert online text to Base64 (that is, it encodes any textual characters into a basic ASCII string). So it may be used for APIs, not for client side code. You'll have to convert that into a typed byte array. charCodeAt method for each character in the string. Encode form file to Base64 in JavaScript. I need to convert a base64 encode string into an ArrayBuffer. If it's already a buffer you get the same encoded value out as what went in. Oct 3, 2012 · If the characters encoded in the input UInt8Array all happen to be in the ASCII (single-byte) range, it will work by chance, but it cannot reproduce full UTF-8. Many web pages and other document formats use UTF-8. When the term "Base64" is used on its own to refer to a specific algorithm, it typically refers to May 31, 2018 · if they simply used the base64 of the HMAC, it'd only be 45 characters long!! Instead they get the 64 character hex string and base64 encode that to get 88 characters!! strange design decision!! So, your code should do the same. The btoa() function is a built-in JavaScript function that takes a binary string as an argument and returns its Base64-encoded equivalent. In this comprehensive guide, we will explore the ins and outs of JavaScript Base64 encoding. Feb 17, 2016 · The problem was at the JavaScript side. I have a GUID in string format e8b75aff-3422-4529-8a6a-15b33e674f48 and I need it in a Base64 string /1q36CI0KUWKahWzPmdPSA== How do I convert it? Thanks. 3. html file. Jun 14, 2024 · Base64. . Below I provide an example of how to encode the contents of a file to Base64 as soon as the user has selected it from his device (i. UI. width, canvas. The first 64 characters out of the 65-character subset are mapped to an equivalent 6-bit binary sequence (26= 64). Data = Buffer. mjs is compiled from base64. You can get started by typing or pasting any string in the input textarea, the tool will convert the entered data to Base64 encoded format in real time. Yesterday I did a deep night coding session and created a small node. Jul 9, 2019 · I was also trying to decode a large image. js APIs, converting between base64-encoded strings and binary data should be performed using Buffer. Jul 20, 2015 · The base64 encoding is done on the server because there is some processing involved by converting from HTML to PDF. Therefore 64 characters are chosen that are both members of a subset common to most encodings (ASCII), and also printable. In this article, you'll learn how to encode a string to Base64 encoded format. Usage: Dec 29, 2019 · This online converter encodes the contents of remote file or webpage to Base64 (that is, it automatically downloads the remote data and convert it to Base64). Now we will put onchange on the input type and this will execute a function imageUploaded () when you upload an image. Base64 encoding works with a 65-character subset of the US-ASCII charset. Since version 3. 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. 0. Note: The blob's result cannot be directly decoded as Base64 without first removing the Data-URL declaration preceding the Base64-encoded data. readAsDataURL() method. In JavaScript, you can easily decode Base64 data using built-in functions, such as atob (). How to Encode and Decode Strings with Base64 in JavaScript. php. Or even better, Base64. Encode a string with Base64. atob (): It decodes a Base64 encoded string created by btoa (). 1. Nov 15, 2020 · I've tried to encode and decode strings in python and javascript, and the b64 encoded string is different in python and javascript when the string contains non english characters. A blob represents binary data […] Oct 22, 2011 · @swateek Works for me: base64regex. In the below code, we have two div elements inside May 7, 2015 · This is because it is a binary-encoded native JavaScript string, not a UTF8-encoded string. before upload it to server). Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by transforming it into a radix-64 representation. Syntax: window. toUint8Array(pngBase64). Encode each line separately (useful for when you have multiple Dec 2, 2008 · To encode a URL, as has been said before, you have two functions: encodeURI() and. btoa() goes from a string to a base64-encoded string, and atob() decodes back. 0, last published: a year ago. There are several approaches in JavaScript that can help you with converting the image into a Base64 string. We then serialize that data and on the other end we deserialize that data and we reconstruct the same string that we originally had (string object doesn't hold the information about encoding used anyway). Feb 19, 2020 · In this article, you'll learn how to encode and decode Base64 strings in JavaScript. Once the upload is complete, the tool will convert the image to Base64 encoded binary data. Data URLs are structured data:[<mediatype>][;base64],<data>, so we split that url at the comma and return only the base64 encoded characters. Approach: Canvas (for legacy browsers) Load the image into an Image-Object, paint it to a nontainted canvas and convert the canvas back to a dataURL. StdEncoding. from() and then decode it to the UTF-8 string by using the toString() method. e. You should be then able to add that base64 encoded string to your get request. How to decode base64 html Feb 11, 2015 · @RobertLongson You are right that some sort of encoding is necessary (b64 being convenient). To use it, just type or paste the URL and press “Encode URL to Base64” (make sure that the URL is publicly available). Passing that function to a new variable, we will use it in another function that will perform the conversion task. In JavaScript, we have two Base64 helper functions, btoa() and atob(), for converting a string into Base64 encoding and vice-versa. url. Newline separator (for the "encode each line separately" and "split lines into chunks" functions). btoa and atob work with strings, which they treat as arrays of bytes, so to use these two functions, you should first convert your array of integers (provided they fall in the range 0-255) into a string. It's using btoa() and atob() functions. Conversely, the btoa() function creates a base-64 encoded ASCII string from a "string" of binary data. split(","), Example of Base64 Decoding in JavaScript. Then on the nodejs server you can use Buffer directly: const b64 = "SGVsbG8sIFdvcmxkIQ=="; const fileDataProcessed = Buffer. Here is what it looks like: I'm in a client-side, javascript context. height); Make sure that your base64 string starts with the data:image/gif;base64, part. Sep 29, 2023 · Whether you’re dealing with images, text, or binary data, JavaScript’s Base64 encoding capabilities are invaluable. Get started by uploading your image by clicking the Upload image button. This PDF to Base64 online encoder tool allows you to quickly and easily encode PDFs in Base64-encoded format. Dec 12, 2011 · You don't need to "decode" a base64 string to draw it in a canvas, just assign it to an image source and draw that image in your canvas. It can encode only BMP(Basic Multilingual Plane, U+0000 - U+FFFF). parseFromString(xmlDataString,"text/xml"); Does anyone know a function besides btoa() which is used for converting strings? Encode files to Base64 format. What I ended up doing (LiveScript): Feb 13, 2012 · 39. Upload. 24. You need TextDecoder or a similar algorithm for that. toString('binary') const decodedData = Buffer(fileDataProcessed, 'base64') // This is the code that you can now upload to your s3 bucket, or somewhere else. I know that btoa() and atob() work as counterparts in javascript. Click on the URL button, Enter URL and Submit. Something like this: context. name, 'base64'); fs. The same rule applies to the opposite direction. However, the atob() function doesn't work properly if the encoded data contains DOMStrings which are 16-bit encoded. Base64 encoding is a process of converting binary data (such as an Jul 12, 2023 · In fact, the size of a Base64 encoded piece of information is 1. encodeToString(originalInput. – Apr 7, 2020 · Base64 Decoding. – NFTX. Latest version: 1. width); directly after setting src I get 0 on the first load in Chrome, but on subsequent page reloads I get the actual width of the image. Utils. That was just the first line of his to-be-translated Javascript code. 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 25, 2023 · Luckily, modern JavaScript provides some easy-to-use global helper functions for just this purpose. like. Take a look at this Stackoverflow question. log Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. what's the goal: client sends a ca Do you have a Base64 string and do not know how to convert it to PDF using JavaScript? Do not worry! I am here to help you. Any base 64 encoder that treats its input strictly as an octet sequence (as opposed to a character stream) will do. The easiest way to convert a string to base64 is using the global btoa() function as follows. Create a blank folder named image and a php file called upload. hex_hmac(apiSecret, data), 'utf-8'). 8k 15 97 119. const url = formatURLs[index]; const base64 = await this. 0, last published: 4 years ago. , and you could base-64 server side, if necessary for your database. , a string in which each character in the string is treated as a byte of binary data). toString ('base64')". In addition to a huge number of features, it provides built-in functions to encode and decode data using the Base64 algorithm. It seems only applying atob to the base64 encoded string doesn't work for binary data. Users can also convert plain data File to base64 encoded text by uploading the file. Press the “Encode file to Base64” button. , you aren't converting strings represented in Unicode from another system or are fine with JavaScript's native UTF-16LE encoding), then you're good to go. So you can have a longer length. With Basic Authentication, you send a request header as follows: Key = 'Authorization' Value = 'Basic '+ base 64 encoding of a user ID and password May 27, 2011 · Once started on the folder that contains the picture to transform, open the url in browser and using developer console you can convert the image to base 64. All you need to do is create a buffer from the Base64 encoding string by using base64 as the second parameter to Buffer. Feb 24, 2012 · For Titanium, you use the built in conversion utility Titanium. Start using base-64 in your project by running `npm i base-64`. Jan 26, 2013 · 1. Given the high popularity of the algorithm, Base64 is well Dec 23, 2012 · It is so simple just use function below: // Parameters: // contentType: The content type of your file. Now we will use a file reader and use the onload event in the file reader then we will get the image URL and we need to Jan 5, 2024 · The basic encoder keeps things simple and encodes the input as-is, without any line separation. log(image. NATO phonetic alphabet. Interesting. Here are few of the examples. encodeURIComponent() The reason both exist is that the first preserves the URL with the risk of leaving too many things unescaped, while the second encodes everything needed. // Define the FileReader which is able to read the contents of Blob var reader = new FileReader(); Feb 26, 2019 · To encode data in Base64, JavaScript provides a function called btoa which is an acronym for “Binary to ASCII”. Upload Image using Base64. Base64Url encoding is specified in RFC 4648, The Base16, Base32, and Base64 Data Encodings. We will initiate an image constructor, and the src property for that Mar 3, 2015 · I'm trying to read an image from client side encoded in base64. Base64 is commonly used to represent binary data in a way that is compatible with HTML, JavaScript, and CSS, such as embedding images or sending form data. js is generated from base64. const blob = new Blob([array]); const reader = new FileReader(); Use our online tool to encode an image to Base64 binary data. One such example is converting a base64 string to a blob using JavaScript. js file which will include JavaScript code and one gfg. If you need more features and better customization for encoding text to Base64, please use the Base64 encoder. Base64 encoding schemes are used when binary data needs to be stored or transferred as textual data. Apr 21, 2014 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand How to convert file to Base64 online. from (str, 'base64') andbuf. Putting 123456 into a Base64 encoder creates MTIzNDU2, which is 8 characters long, just as we expected. encodeURI (): This encodeURI () function is used to encode a URI. And as explained above everything works perfectly if strings are en- and decoded. Feb 15, 2024 · Em JavaScript, temos duas funções auxiliares Base64, btoa() e atob(), para converter uma string em codificação Base64 e vice-versa. btoa() is supported in all modern browsers and Node. To encode a Blob object to Base64 in JavaScript you can use the FileReader. To convert image to Base64 and get the original Base64 string, I highly recommend using one of the following methods: Encode remote file to Base64 in JavaScript. var parser = new DOMParser(); var xmlDoc = parser. Javascript atob is not decoding the base64 string properly. Oct 17, 2023 · The core functions to base64 encode and decode in JavaScript are btoa() and atob() . Base64 is the most widely used base encoding technique with Base16 and Base32 being the other two commonly used encoding schemes. This can handle other types of files also. atob Apr 8, 2020 · In JavaScript, these are the functions respectively for encoding and decoding Base64 strings and URL. js >= 16. edited Jun 15, 2015 at 17:10. In fact, it is a data URL, but it contains the Base64-encoded image: May 3, 2016 · Question was not to get base64 data from an existing image but you are actually still answering the question and basically should be the accepted answer since the solution doesn't require an additional framework like @AliMamedov's answer does. In JavaScript, it is possible to use Base64 to encode and decode strings. However, using them correctly and effectively can be confusing. . getEncoder(). Firstly, create a canvas, then load the image into it and use toDataURL () to get the Base64 representation. mjs. A robust base64 encoder/decoder that is fully compatible with `atob()` and `btoa()`, written in JavaScript. Once the data is encoded, you can click in the output textarea to copy the Aug 25, 2022 · Base64 encoding and decoding in JavaScript. May 1, 2018 · Therefore, I need some help converting my XML Doc variable into Base64 (instead of my XML string) using Javascript. Example 1: Encode a String to Base64 Using btoa() However, JavaScript allows you to get it immediately after the user has selected the file (for example, it is useful if you want to show the image preview). The btoa() takes a string and encodes it to Base64, and atob() takes an encoded string and decodes it. xf wv ve br kn dh pa op fz us