QR Code Generator

Create High-Quality QR Codes Instantly

Generate high-quality QR codes from text, URLs, contact information, WiFi credentials, and more - completely free. All processing is done in your browser, with no data sent to servers. Choose from 3 sizes: 128px, 256px, or 512px. Download as PNG format.

How to Use

Using the QR Code Generator is very simple. Follow these 3 steps to create your QR code:

Step 1: Enter Content

Enter the content you want to encode in the QR code in the text area. Supports URLs, text, contact information, WiFi credentials, and all types of data.

Step 2: Select Size

Choose the QR code size according to your use case. Select from Small (128x128px), Medium (256x256px), or Large (512x512px).

Step 3: Generate & Download

Click the 'Generate QR Code' button to instantly display your QR code. Use the 'Download' button to save it as a PNG image.

🔒 Privacy Protected: All QR code generation is performed in your browser. Input data is never sent to servers, ensuring complete security.

QR Code Generator

Content to Encode

QR Code Size

Small (128x128) Medium (256x256) Large (512x512)

Practical Use Cases for QR Code Generator

QR Code Generator is used in various scenarios, from business to personal use:

1. Sharing Website URLs

Print QR codes on business cards, flyers, posters, and product packaging to make URLs easily accessible via smartphones. Eliminates the need for manual URL entry, improving user experience.

2. Sharing WiFi Networks

Encode WiFi SSID, password, and encryption type in a QR code, allowing guests to connect to your network without entering passwords. Perfect for cafes, offices, and event venues.

3. Sharing Contact Information (vCard)

Embed contact information like name, phone number, email address, and physical address in vCard format, enabling instant contact saving via smartphone during business card exchanges.

4. Product Information and Manuals

Print QR codes on product packaging and instruction manuals to provide detailed product information, video tutorials, and support page links. Save paper space while providing rich information.

5. Event Tickets and Access Control

Embed unique QR codes in event tickets for efficient identity verification and access control via scanning at entry. Widely used in concerts, exhibitions, and seminars.

6. Payments and Mobile Payment

Mobile payment services like PayPay, Alipay, and WeChat Pay commonly use QR codes for transactions. Merchants display QR codes, and customers scan to complete payments easily.

7. Sharing Social Media Profiles

Convert Instagram, Twitter, Facebook, and LinkedIn profile URLs into QR codes to make following and connecting easier. Perfect for business cards and profile cards.

What is QR Code Generator

QR Code Generator is a free online tool that converts data like text, URLs, contact information, and WiFi credentials into 2D barcodes (QR codes) scannable by smartphones and tablets.

How QR Codes Work

QR (Quick Response) codes are 2D barcodes developed by Denso Wave in 1994. They represent information using black and white square patterns, capable of storing up to approximately 4,000 alphanumeric characters or 7,000 numeric characters. Easily scanned with smartphone camera apps, they instantly decode information.

QR Code Types and Encoding Methods

QR codes can encode various data formats including text, URLs, phone numbers, SMS, email addresses, vCard (contact information), WiFi credentials, and GPS coordinates. Error correction capability (L/M/Q/H levels) allows data recovery even if partially dirty or damaged.

QR Code Size and Resolution

Physical QR code size is determined by scanning distance and use case. Generally, sizes around 10% of scanning distance are recommended (e.g., 10cm square for scanning from 1 meter). For digital use, 256x256px is standard; for printing, 300dpi or higher resolution is recommended.

Benefits of QR Code Generator

Using QR Code Generator provides numerous advantages:

1. Completely Free

No account registration required, no usage limits, no watermarks. Generate unlimited QR codes absolutely free.

2. Privacy Protected

All processing is done in your browser, with no data sent to servers. Confidential information can be used safely.

3. Instant Generation

No server communication required, so QR codes are generated immediately after input. Zero wait time improves work efficiency.

4. High-Quality PNG Output

Download in high-quality PNG format suitable for printing. Use for business cards, flyers, posters, product packaging, and all purposes.

5. Selectable Sizes

Choose from 3 sizes according to use case: 128px (small web size), 256px (standard size), or 512px (large print size).

6. Cross-Platform

Works on all devices and browsers including Windows, Mac, Linux, iOS, and Android. Create QR codes anytime, anywhere.

Tips for Using QR Codes Effectively

Best practices for effectively utilizing QR codes:

1. Choose Appropriate Size

Use 256px or larger for business cards and flyers, 512px or larger for posters and signboards. Ideal size is approximately 10% of scanning distance.

2. Ensure Contrast

QR codes are more readable with higher black and white contrast. Use black QR codes on light backgrounds, white QR codes on dark backgrounds.

3. Shorten URLs

Long URLs create complex QR codes and increase read errors. Use URL shortening services like bit.ly or TinyURL to generate simpler QR codes.

4. Conduct Test Scans

Before printing, always test scan with multiple smartphones to verify correct reading. Especially important for small sizes.

5. Add Explanatory Text

Adding explanatory text near QR codes like 'Scan for details' or 'Connect to WiFi' improves user scan rates.

Frequently Asked Questions (FAQ)

Is the QR Code Generator completely free?

Yes, the QR Code Generator is completely free with no usage limits or watermarks. No account registration required, and you can generate unlimited QR codes.

Do generated QR codes have expiration dates?

No, generated QR codes have no expiration dates. Once downloaded, PNG images are permanently usable and can be scanned anytime. However, for URLs, access becomes unavailable if the destination page is deleted.

Is QR code data stored on servers?

No, all QR code generation processing is performed in your browser. Input data and generated QR codes are never sent to servers, ensuring complete privacy protection.

How much data can be encoded in a QR code?

QR codes can encode up to approximately 4,296 alphanumeric characters or 7,089 numeric characters. However, more data creates more complex QR codes and may increase read errors. For URLs, using URL shortening services is recommended.

Can generated QR codes be used commercially?

Yes, generated QR codes can be used freely including commercial use. Usable for business cards, flyers, product packaging, advertising, and all purposes. No license fees or usage fees required.

Can QR code colors be changed?

The current tool generates standard black and white QR codes. To change colors, edit with image editing software (Photoshop, GIMP, etc.) after downloading. However, note that low contrast may reduce readability.

How to create WiFi QR codes?

To create WiFi QR codes, enter text in this format: WIFI:T:WPA;S:NetworkName;P:Password;; (Example: WIFI:T:WPA;S:MyWiFi;P:mypassword123;;). When scanned with smartphones, it automatically connects to the WiFi network.

What QR code size is suitable for printing?

For printing purposes, we recommend a minimum of 256x256px, preferably 512x512px. Resolution of 300dpi or higher is ideal. For physical size, use approximately 10% of scanning distance as a guide (e.g., 10cm square for scanning from 1 meter).