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What are some trustful ways to generate an Ethereum account in a JSON/UTC v3 format? I know some web wallets, but I would prefer a very used/well-known desktop or plugin wallet. Metamask does not allow me to generate this format. It only allows me to export the private key in plain text.

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    MyCrypto has a desktop app that can create JSON files – Ismael Mar 2 at 5:48
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you can try Vanity ETH, it can even create a custom prefix for your address https://github.com/MyEtherWallet/VanityEth

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I developed a small script for that.

const ethers  = require('ethers');
require("dotenv").config();
const fs = require('fs');

let wallet = ethers.Wallet.createRandom();
const password = process.env.PASSWORD_WALLET;
const promisseJSON = wallet.encrypt( password);
promisseJSON.then((jsonWallet) => {
    fs.writeFileSync("teste.json", jsonWallet);
});

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