Overview

The Vietnamese Banking QR Code Generator is a small utility I built to quickly create and test VietQR payment codes without going through a banking app. Give it a bank, an account number, and an optional amount or message, and it renders a QR code that any Vietnamese banking app can scan to pre-fill a transfer.

It started as a throwaway script for testing payment flows, but turned out useful enough to keep around as a standalone tool.

What It Does

Generates VietQR-compatible codes following the Napas 247 / EMVCo QR specification used across Vietnamese banks.
Encodes the recipient bank (BIN), account number, and optional transfer amount and remark.
Renders the QR live in the browser so you can scan and verify it instantly with a real banking app.
Useful for testing payment integrations, generating static "buy me a coffee" codes, or sharing account details without typing them out.

How It Works

VietQR is built on the EMVCo merchant-presented QR standard. Each code is a structured string of tag-length-value fields that carry the bank identifier, account number, currency (704 = VND), and an optional amount, terminated by a CRC-16 checksum.

The generator assembles these fields client-side, computes the checksum, and feeds the resulting payload into a QR renderer. Because everything happens in the browser, no account data is ever sent to a server.

Tech Stack

Built with Nuxt for a fast, file-based single-page app, with the QR payload assembled in plain TypeScript. It is deployed as a static site, so it loads instantly and runs entirely on the client.

Note: this is a personal testing tool, not an official banking product. Always verify the generated code with a small transfer before relying on it.