Free QR Code Generator

Example Calculation

Enter https://tidymath.com and the generator draws a QR code that opens that address when a phone camera scans it. You can also encode plain text, a phone number or a Wi-Fi login.

Before you print one, test it with two different phones. Leave a quiet white border around it, keep a strong contrast between the dark and light parts, and do not shrink it below about 2 cm (0.8 in) if it will be scanned from a short distance.

How It Works

A QR (Quick Response) code is a two-dimensional barcode that phones can scan with the camera. This free QR code generator encodes any text — a website address, a phone number, an email, a Wi-Fi login or plain words — into a QR code that you can download and use on flyers, menus, business cards or packaging. Codes are generated entirely in your browser using our own encoder, with no external libraries and no account.

The generator picks the smallest QR “version” (grid size) that can hold your data. A short URL produces a compact code with fewer squares that scans easily from a distance, while very long text creates a denser code. The error correction level controls how much of the code can be damaged or covered and still scan: Low recovers about 7% of data, Medium 15%, Quartile 25% and High 30%. Higher correction is useful for printed materials that may get scuffed, but it makes the code larger.

Use the color pickers to match your brand, but keep strong contrast: a dark foreground on a light background scans most reliably, and inverted or low-contrast codes may fail on some scanners. Keep the quiet zone — the empty margin around the code — at four modules or more. Download the SVG for print, since it stays sharp at any size, or the PNG for quick use on web pages and slides.

Before printing hundreds of copies, always test the code with more than one phone, at the actual size and from the distance people will scan it. As a rule of thumb, make the code at least 0.8 inches (2 cm) wide, and larger for posters. Static codes like these never expire and do not track scans, because the destination is encoded directly in the pattern.

Formula Explained

The text is converted to UTF-8 bytes, padded, protected with Reed–Solomon error-correction codewords over GF(256), interleaved in blocks and placed in the grid with finder, timing and alignment patterns. The best of eight mask patterns is chosen to minimize hard-to-scan areas.

Assumptions and limits

• The code is generated in your browser. Nothing is sent to a server, and the code never expires because the content is inside the pattern.
• It is a static code: it cannot be edited later and it does not track scans.
• Higher error correction survives more damage but makes the code larger. Test the printed code with more than one phone at the size and distance it will be scanned.
• The code follows the QR Code standard (ISO/IEC 18004). Very long text does not fit and the tool will say so.