I was looking for some standard function like hex to string but inverse, I want to convert String to Hex, but I only found this function...
// Example of convert hex to String
hex.toString('utf-8')
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4 Answers
In NodeJS, use Buffer to convert string to hex.
Buffer.from('hello world', 'utf8').toString('hex');
Simple example about how it works:
const bufferText = Buffer.from('hello world', 'utf8'); // or Buffer.from('hello world')
console.log(bufferText); // <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
const text = bufferText.toString('hex');
// To get hex
console.log(text); // 68656c6c6f20776f726c64
console.log(bufferText.toString()); // or toString('utf8')
// hello world
//one single line
Buffer.from('hello world').toString('hex')
3 Comments
droid-zilla
I have a base64 string that contains a colon and when I converted it to hex then back to base64 it would strip off the colon. This fixed it thanks!
kemicofa
This works in
react-native just need to install yarn add buffer
Ke Vin
To have an evenly spaced, 2-letter output, one can just do the following:
Buffer.from('hello world', 'utf8').toString('hex').replace(/../g, '$& ')You can use function like the below:
function stringToHex(str) {
//converting string into buffer
let bufStr = Buffer.from(str, 'utf8');
//with buffer, you can convert it into hex with following code
return bufStr.toString('hex');
}
stringToHex('some string here');
Comments
NPM amrhextotext, simple converter text to hex and hex to text
Install
npm i amrhextotext
Usange:
const text = 'test text'
const hex = '746573742074657874'
const convert = require('amrhextotext')
//convert text to hex
let hexSample = convert.textToHex(text)
//Result: 746573742074657874
//Convert hex to text
let textSample = convert.hexToUtf8(hex)
//Result: test text
note: Source from page
1 Comment
dege
Hi Diego welcome to SO, maybe you can add a link to the package or even adding an example how to use it
If you want a pretty hex string of numbers plotted with 0x prefix :
export function toHexString(value: Buffer | number[]): string {
if(!value) return null;
if(typeof value == "object") value = Buffer.from(value);
return value.toString('hex').match(/.{1,2}/g).map(val => `0x${val}`).join(", ");
}
