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QR Code Generator

Create customizable QR codes for URLs, text, WiFi and vCards.

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Processed locally — your files are not uploaded to any server.
Comprehensive Guide & Specifications

Everything you need to know about using QR Code Generator effectively.

What is QR Code Generator and Why Use It?

A QR code is a compact way to move something from a screen or a printed surface onto a phone without anyone typing it, and this encodes your content into one drawn on a canvas in the page, with error-correction data included so the code still scans when it is partly obscured or imperfectly printed. URLs are the common case, but plain text, WiFi credentials and contact details work too, and size and colours can be adjusted to fit a design. Before printing at any volume, scan the finished code with a real phone — that single check catches most problems. Longer content produces a denser grid that has to be printed larger to stay readable, and weak contrast between foreground and background is the usual reason a scanner refuses to lock on. Remember too that a QR code is not private: anyone who can see it can read it.

Step-by-Step Instructions

  1. 1

    Enter your destination URL, plain text, or WiFi network details.

  2. 2

    Customize dot styling, corner markers, foreground color, and logo.

  3. 3

    Download your high-resolution QR code as a PNG, JPEG, or scalable SVG.

Formula / Calculations Explained

Reed-Solomon Error Correction Matrix

Encodes binary, alphanumeric, or byte data into a two-dimensional grid with Reed-Solomon error correction so codes remain readable if damaged.

Important Considerations

  • Test the finished code with an actual phone before printing it at volume.
  • Longer content means a denser grid, which needs to be printed larger to stay scannable.
  • Keep strong contrast between foreground and background — inverted or low-contrast codes are the usual reason a scanner refuses to lock on.
  • A QR code is not private. Anyone who can see it can read what it encodes.

Frequently Asked Questions

Do generated QR codes expire?▼

No. These are static QR codes that encode your data directly into the matrix patterns, so they work forever without redirects or subscriptions.

What error correction level is used?▼

You can select up to Level H (High), which allows the QR code to be scanned even if up to 30% of its surface is covered or damaged.

Are my links and WiFi passwords private?▼

Yes. QR matrices render entirely on an HTML5 canvas inside your browser; no data is ever sent to an external server.

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