buffer to string returns object object

Node.js Stream - Buffer to String gives [object Object]

stackoverflow.com › questions › 27672424 › node-js-stream-buffer-to-string-gives-object-object › 27672464

through2.obj makes an object stream (or a stream in object mode). Through an object stream objects flow, not buffers. What you get is not a buffer, but an object obj. That is why its toString method gives [object Object]. Perhaps what you are looking for is in obj.contents?

Answer from spelufo on Stack Overflow

W3Schools

w3schools.com › nodejs › met_buffer_tostring.asp

Node.js buffer toString() Method

The toString() method returns the buffer object according to the specified encoding.

Stack Overflow

stackoverflow.com › questions › 27672424 › node-js-stream-buffer-to-string-gives-object-object › 27672464

Node.js Stream - Buffer to String gives [object Object]

Top answer

1 of 1

JS/NodeJS JSON Buffer to String

node.js - Converting a nodejs buffer to string and back to buffer gives a different result in some cases

node.js - Buffer to String?

node.js - "[object object] string" instead of just JSON

node.js - Convert buffer to readable string javascript

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nodejs.org › api › buffer.html

Buffer | Node.js v26.10.0 Documentation

Returns a new ReadableStream that allows the content of the Blob to be read as a stream of UTF-8 decoded strings. It is equivalent to piping blob.stream() through a TextDecoderStream set up with UTF-8. ... The content-type of the Blob. Once a <Blob> object is created, it can be sent via MessagePort ...

Adeva

adevait.com › nodejs › convert-node-js-buffer-to-string

How to Convert Node.js Buffer to String | Toptal®

May 26, 2026 - In a nutshell, it’s easy to convert a Buffer object to a string using the toString() method. You’ll usually want the default UTF-8 encoding, but it’s possible to indicate a different encoding if needed.

MDN Web Docs

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › ArrayBuffer

ArrayBuffer - JavaScript - MDN Web Docs

You cannot directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object which represents the buffer in a specific format, and use that to read and write the contents of the buffer. The ArrayBuffer() constructor creates a new ArrayBuffer of the given length in bytes. You can also get an array buffer from existing data, for example, from a Base64 string or from a local file.

GitHub

github.com › nodejs › node › issues › 6075

Incorrect result for Buffer#toString · Issue #6075 · nodejs/node

April 6, 2016 - All the posts are grouped under same key, because #toString() returns same value for both the buffer object.

Author: nodejs

Stack Overflow

stackoverflow.com › questions › 41951307 › convert-a-json-object-to-buffer-and-buffer-to-json-object-back

node.js - Convert a JSON Object to Buffer and Buffer to JSON Object back - Stack Overflow

Top answer

1 of 3

359

You need to stringify the json, not calling toString

var buf = Buffer.from(JSON.stringify(obj));

And for converting string to json obj :

var temp = JSON.parse(buf.toString());

2 of 3

Kindly copy below snippet

const jsonObject = {
        "Name":'Ram',
        "Age":'28',
        "Dept":'IT'
      }
      const encodedJsonObject = Buffer.from(JSON.stringify(jsonObject)).toString('base64'); 
      console.log('--encodedJsonObject-->', encodedJsonObject)
      //Output     --encodedJsonObject--> eyJOYW1lIjoiUmFtIiwiQWdlIjoiMjgiLCJEZXB0IjoiSVQifQ==

      const decodedJsonObject = Buffer.from(encodedJsonObject, 'base64').toString('ascii'); 
      console.log('--decodedJsonObject-->', JSON.parse(decodedJsonObject))
      //Output     --decodedJsonObject--> {Name: 'Ram', Age: '28', Dept: 'IT'}

Medium

medium.com › hackernoon › https-medium-com-amanhimself-converting-a-buffer-to-json-and-utf8-strings-in-nodejs-2150b1e3de57

Converting a Buffer to JSON and Utf8 Strings in Nodejs | by Aman Mittal | HackerNoon.com | Medium

April 1, 2019 - The JSON specifies that the type of object being transformed is a Buffer, and its data. .toString() is not the only way to convert a buffer to a string.

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Stack Overflow

stackoverflow.com › questions › 57250921 › converting-buffer-to-string

converting buffer to string - javascript

Top answer

1 of 2

You should pass the encoding to the .toString() function like in thew following example:

foo.toString('utf8');

2 of 2

Try this :

let data = {"buffer": {
    "type": "Buffer",
    "data": [
        8,
        4,
        18,
        32,
        203,
        243,
        203,
        190,
        254,
        80,
        185,
        227,
        225,
        187,
        114,
        219,
        243,
        87,
        83,
        254,
        248,
        95,
        139,
        1,
        26,
        198,
        149,
        158,
        30,
        44,
        146,
        237,
        166,
        70,
        199,
        9,
        26,
        32,
        138,
        251,
        102,
        14,
        230,
        244,
        102,
        250,
        142,
        53,
        210,
        190,
        9,
        23,
        169,
        98,
        14,
        156,
        148,
        99,
        168,
        204,
        145,
        108,
        191,
        223,
        189,
        58,
        202,
        61,
        52,
        254
    ]
}}
let newstr = JSON.stringify(data);
console.log(newstr)
console.log(JSON.parse(newstr).buffer.data)

Bun

bun.com › guides › binary data › buffer to string

Convert a Buffer to a string | Bun Guides

The Buffer class provides a .toString() method that converts a Buffer to a string.

Joshtronic

joshtronic.com › 2022 › 11 › 27 › convert-a-buffer-to-a-string-in-nodejs

Convert a buffer to a string in Node.js - Joshtronic

November 27, 2022 - The buffer is effectively just an array of integers that represent the data that it contains. To get a string back out of the buffer, simply use .toString():

freeCodeCamp

freecodecamp.org › news › node-js-buffer-explained

Node.js Buffer Explained

February 17, 2020 - Do notice that, Buffer API also provides a direct function toJSON() to convert a buffer into a JSON object. To examine the size of a buffer, we can use length method. ... Now let us convert buffer to a readable string, in our case, the utf-8 encoded.

Stack Overflow

stackoverflow.com › questions › 74969221 › convert-buffer-to-string

convert Buffer to String - javascript

Top answer

1 of 1

UCS-2 is a character encoding standard in which characters are represented by a fixed-length 16 bits (2 bytes)

With the encoding known you can decode properly and get the data as expected:

const data = [79, 0, 98, 0, 115, 0, 116, 0, 59, 0, 80, 0, 101, 0, 114, 0, 115, 0, 111, 0, 110, 0, 59, 0]
const dataBuffer = Buffer.from(data)
const utf16Decoder = new TextDecoder('UTF-16')

console.log(utf16Decoder.decode(dataBuffer)) // Obst;Person;

I think it's trying to decode as utf8 by default and getting upset at the unrenderable null bytes between every character:

GeeksforGeeks

geeksforgeeks.org › node-js-buffer-tostring-method

Node.js Buffer.toString() Method | GeeksforGeeks

October 13, 2021 - end: The last index of the buffer data up to which encoding has to be done. Its default value is Buffer.length. Return Value: It returns decoded string from buffer to string according to specified character encoding.

DEV Community

dev.to › melvin2016 › how-to-convert-a-string-to-buffer-and-vice-versa-in-node-js-5op

How to convert a String to Buffer and vice versa in Node.js - DEV Community

September 19, 2020 - To convert a Buffer to a String, you can use the toString() in the Buffer object.

Medium

medium.com › @ryan_forrester_ › buffer-to-string-in-javascript-how-to-guide-b24027575419

Buffer to String in JavaScript (How To Guide) | by ryan | Medium

January 7, 2025 - Only the first five bytes of the buffer are converted to a string, resulting in the output “Hello”. When working with binary data from APIs, you often receive data as buffers.

Stack Overflow

stackoverflow.com › questions › 48980375 › how-to-properly-turn-buffer-object-into-string

How to properly turn buffer object into string?

February 26, 2018 - The data that is received is a buffer, the object that comes out of it is suppose to look something like this : {name:"usersname"}. using .toString() on the buffer, gives me name=username (in string format obv)

Medium

medium.com › @techsuneel99 › how-to-convert-a-buffer-to-json-in-node-js-4fa9ef98160

How to convert a Buffer to JSON in Node.js ? | by Suneel Kumar | Medium

December 31, 2023 - In this example, a Buffer is created ... object. Finally, the JSON representation is logged to the console using JSON.stringify. Note that this example creates a simple JSON structure with an array (data) to hold the buffer elements. Depending on your specific use case, you might want to structure the JSON differently or include additional information. Adjust the code accordingly based on your requirements. Buffer.values() returns an iterator ...

Bureau of Economic Geology

beg.utexas.edu › lmod › agi.servlet › doc › detail › java › lang › StringBuffer.html

java.lang Class StringBuffer

Converts to a string representing the data in this string buffer. A new String object is allocated and initialized to contain the character sequence currently represented by this string buffer. This String is then returned.