QR Code Generator

QR Code Content Input


QR Code Settings

Download QR Code

LOGO Mode Settings

Introduction to QR Code

The QR code (Quick Response Code) is a two-dimensional barcode, developed in 1994 by Masahiro Hara from the Japanese company DENSO WAVE. Compared to traditional one-dimensional barcodes, QR codes can encode information both horizontally and vertically, allowing them to store approximately 7,000 numbers or about 3,000 Chinese characters.
QR codes feature position detection patterns in their three corners, enabling scanners to correctly recognize the code and increase reading speed more than tenfold compared to other barcodes.
Additionally, QR codes have an error correction capability of 7% to 30%, meaning they can be read even if partially damaged. This feature also allows for embedding images like logos within the QR code.


Operation Guide

Please enlarge the video for instructional viewing Step 1: In the QR Code Content Input panel, select the desired category from the Choose QR Code Type menu. Different types will open different apps upon scanning.
Step 2: Fill in the content input box for the category you have chosen.
Step 3: In the QR Code Settings panel, adjust the QR code's size, color, border, and corner radius.
Step 4: In the LOGO Mode Settings panel, choose whether to display a LOGO or select the LOGO style from the Select LOGO Mode menu.
Step 5: Depending on the selected LOGO style, adjust the size, position, color, font, or upload an image file.
Step 6: Once adjustments are complete, download the QR code image.


About Us

Designer: Simon Lee
Mail: [email protected]

qr.ioi.tw is a free, colorful QR code generator with LOGO functionality. It can generate various types of QR codes online, including URLs, bank accounts, cryptocurrencies, maps, text messages, etc. It also scans QR codes and offers a multi-language interface.

In January 2010, the website was first launched, solving the problem of foreign QR code generators not being able to properly store Chinese characters.
In August 2011, the page was redesigned, simplifying the QR code generation process to 3 steps.
In May 2013, style settings and multi-language features (including Arabic) were added, and the URL was changed to www.qr-123.com.
In November 2013, the program was optimized to make QR codes smaller and smoother, and map operations were enhanced.
In August 2015, the layout was adapted to different devices (mobile phones, tablets, desktop computers) in terms of screen size and orientation, and the URL was changed back to qr.ioi.tw.
In April 2018, features to change colors, set corner radii, and add LOGOs were added, retaining only Chinese, English, Portuguese, and Korean languages.
In January 2019, a software-like interface design was adopted, adding copyright and operation instructions.
Between March and May 2022, features for bank transfers, Bitcoin, Ethereum addresses QR codes, and scan-to-copy effects were successively added.
In March 2024, TWQR will be modified. Added Korean, German, Russian, Turkish, and Polish languages.


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