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 - What encodings does Buffer.toString() support?

node.js - Convert buffer to readable string javascript

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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 ...

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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.

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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.

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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.

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'}

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)

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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.

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.

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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.

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

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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.

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

How to properly turn buffer object into string?

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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.