QR Code Generator — Free, No Limits
100% Private — files never leave your device
How to Generate a QR Code
Vizua is a free QR code generator that creates scannable codes directly in your browser. Enter any URL, text, or Wi-Fi credentials, click "Generate QR Code," and download the result as a high-resolution PNG. No account, no watermarks, no usage limits.
To generate a QR code, type or paste your content into the input field above. Vizua encodes it instantly using the QR code standard (ISO/IEC 18004) with error correction, ensuring reliable scanning even if the printed code is slightly damaged or dirty.
What Can You Encode in a QR Code?
- Website URLs — link to any webpage, landing page, or online resource
- Plain text — encode messages, serial numbers, or reference codes
- Wi-Fi credentials — let guests join your network by scanning (
WIFI:T:WPA;S:NetworkName;P:Password;;) - Email addresses — use
mailto:you@example.comto open a compose window - Phone numbers — use
tel:+1234567890to trigger a phone call - vCard contacts — encode full contact information for one-tap saving
QR Code Size for Printing
The size slider controls the output dimensions in pixels. For web use, 200-300px is typically sufficient. For business cards, generate at 400px+ to ensure crisp printing at small sizes. For posters and signage, use 800-1000px or higher. A general rule: the QR code should be at least 1/10 the width of the expected scanning distance.
Static vs Dynamic QR Codes
Vizua generates static QR codes — the data is encoded directly in the pattern. These codes never expire, work without internet, and cannot be altered after creation. Dynamic QR codes (offered by paid services) redirect through a server URL that can be changed later — but they stop working if that service shuts down. Static codes are permanent and independent.
Wi-Fi QR Codes
One of the most practical uses for QR codes is Wi-Fi sharing. Enter your credentials in the standard format and guests can connect by scanning with their phone camera — no typing long passwords. Works with both iOS and Android devices. Perfect for offices, vacation rentals, restaurants, and home guests.
100% Private — Browser-Based
Your data stays on your device. Vizua generates QR codes entirely in your browser using JavaScript — no text, URL, or Wi-Fi password is ever sent to a server. This is critical for sensitive data like Wi-Fi credentials or private URLs. The tool works offline after the initial page load.
Frequently Asked Questions
How do I generate a QR code for free?
Type or paste your URL, text, or Wi-Fi credentials into Vizua and click "Generate QR Code." Your QR code is created instantly in your browser and can be downloaded as a PNG image. No account, no limits, completely free.
Are QR codes free to use?
Yes. QR code is an open standard (ISO/IEC 18004) — there are no licensing fees or royalties. You can generate, print, and distribute QR codes freely for personal or commercial use. Vizua generates them at no cost with no watermarks.
Can I create a QR code for Wi-Fi?
Yes. Enter your Wi-Fi credentials in the format WIFI:T:WPA;S:YourNetworkName;P:YourPassword;; and Vizua generates a QR code that lets people connect to your Wi-Fi by scanning it with their phone camera. Perfect for guests, offices, and cafes.
What size should a QR code be for printing?
For reliable scanning, a QR code should be at least 2x2 cm (about 0.8x0.8 inches) at the expected scanning distance. For posters and signage, scale up proportionally — a rule of thumb is the QR code width should be at least 1/10 of the scanning distance. Vizua lets you choose the output size in pixels.
Do QR codes expire?
Static QR codes (like the ones Vizua generates) never expire — they encode data directly in the pattern and work forever without any server. Dynamic QR codes from other services can expire because they redirect through a URL shortener that can be disabled. Vizua's QR codes are self-contained and permanent.