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Vizua

QR Code Generator — Free Online

Your files never leave your device

How to Generate a QR Code

Vizua is a free static QR code generator that renders a PNG in your browser. Enter a URL, plain text, or a correctly formatted payload, choose a requested pixel size, and download the result. No account is required and the image has no Vizua watermark.

The encoder selects a matrix for the entered payload and the tool adds a four-module white quiet zone. It uses whole-pixel modules, so the downloaded canvas may be slightly smaller than the selected size. Error correction can help in some conditions, but it does not guarantee recovery from damage, dirt, low contrast, poor scaling, or an unsupported scanner.

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.com to open a compose window
  • Phone numbers — use tel:+1234567890 to trigger a phone call
  • vCard contacts — encode full contact information for one-tap saving

QR Code Size for Printing

The size slider requests 100 to 1000 pixels. Because each dark or light module is drawn as a whole number of pixels, the actual PNG can be slightly smaller. Keep it square, preserve the four-module white border, avoid blur or non-integer resampling, and test the final display or print with representative scanners at the intended distance.

Static vs Dynamic QR Codes

Vizua generates static QR codes: the entered payload is encoded directly in the pattern and cannot be edited without creating a new code. The pattern has no built-in expiration date and plain text can be decoded without a network connection. Content such as a website, online menu, email action, or changed Wi-Fi network can still depend on connectivity and an available destination. Dynamic QR services normally encode a managed redirect, which can be changed later but depends on that service remaining active.

Wi-Fi QR Codes

You can encode a Wi-Fi payload such as WIFI:T:WPA;S:NetworkName;P:Password;;. The generator encodes the text exactly as entered; it does not validate the security type, escape reserved characters, test the credentials, or control the scanner's behavior. Review the payload and test it on the actual device fleet before sharing it.

Browser processing

Vizua generates the QR image in your browser. The entered content is not sent to Vizua’s image-processing server. The page may still make network requests for required assets, analytics, consent, ratings, or other site features, so do not treat a web tool as the right place for a secret unless that exposure model is acceptable to you.

Frequently Asked Questions

How do I generate a QR code for free?

Type or paste a payload, choose the requested pixel size, and click "Generate QR Code." Vizua creates a static PNG in the browser with a four-module white quiet zone. The final canvas can be slightly smaller than the requested size so every module remains an integer number of pixels.

Are QR codes free to use?

Vizua does not charge to generate or download this static QR graphic and does not add a watermark. This tool does not provide legal advice, license third-party content, register a destination, or guarantee that a particular commercial workflow accepts the code.

Can I create a QR code for Wi-Fi?

You can encode a Wi-Fi payload such as WIFI:T:WPA;S:YourNetworkName;P:YourPassword;;. Whether a scanner offers to join the network depends on its support for that payload syntax, the security type, correct escaping, current credentials, and device policy. Treat the password as sensitive input.

What size should a QR code be for printing?

There is no universal physical size that guarantees a scan. Payload length, module count, quiet zone, print resolution, contrast, surface, damage, camera, software, and scanning distance all matter. Generate enough pixels to keep modules sharp, preserve the four-module quiet zone, and test the final print at the intended distance.

Do QR codes expire?

The pattern of a static QR code does not have a built-in expiration date. Whether it remains useful depends on the encoded content, print quality, scanner compatibility, and any destination it references. A URL can stop working, Wi-Fi credentials can change, and a damaged or poorly sized print may no longer scan.

What you can do with QR Code Generator — Free Online

Generate a static QR code for a URL, plain text, or Wi-Fi details. Choose size and colors, inspect the result, and download a PNG.

QR Code Generator — Free Online is designed for quick, repeatable work in a modern browser. The controls on this page let you prepare the result without installing software or creating an account.

How to use QR Code Generator — Free Online

  1. Select or drop the file you want to process, or enter the information requested by the tool.
  2. Review the available settings before processing, especially format, dimensions, quality, color, or other details that affect the output.
  3. Inspect the result, download the new file, and keep the original unchanged in case you need another version.

Private by design

Your files never leave your device. All processing happens locally in your browser.

Tips for better results

  • Start with the cleanest source available; a small, blurry, or heavily compressed file contains less detail to preserve.
  • Check dimensions and format before downloading so the result matches the site, app, printer, or platform where you will use it.
  • For large files, close unnecessary tabs and test one representative file before processing a full batch.
  • Open the downloaded result once before sharing it or replacing an original.

Where QR Code Generator — Free Online fits in a workflow

Use QR Code Generator — Free Online for one-off adjustments or as a preparation step before publishing, sharing, archiving, or continuing the edit in another application. When batch processing is available, validate the settings on a small sample first and then apply them to the remaining files.