QR Code Generator

A QR code generator converts text, URLs, or other data into a scannable two-dimensional barcode. QR codes were invented in 1994 by Denso Wave for tracking automotive parts, but they've since become ubiquitous in marketing, payments, authentication, and everyday information sharing.

This generator runs entirely in your browser. Enter any text or URL, choose your preferred size and error correction level, and instantly get a downloadable PNG image. No server processing, no account required, no watermarks.

A QR code encodes data in a matrix of dark and light modules (squares). The code includes several functional patterns: three large finder patterns in the corners help scanners locate and orient the code, alignment patterns help with distortion correction, and timing patterns help determine the grid size.

The actual data is encoded using one of four modes — numeric, alphanumeric, byte, or kanji — chosen automatically based on the input. Reed-Solomon error correction codes are added so the data can be recovered even if part of the QR code is damaged or obscured.

QR codes have become essential business tools. Restaurants use them for contactless menus. Retailers link to product details, reviews, or AR experiences. Payment systems like Alipay and many banking apps rely on QR codes for transactions. Event organizers use them for ticketing and check-in.

For marketing campaigns, QR codes bridge the gap between physical and digital media. A QR code on a poster, business card, or product package can link directly to a landing page, app download, or special offer. Track engagement by using URL shorteners with analytics before encoding.

Keep your encoded data as short as possible. Shorter URLs produce simpler, easier-to-scan codes. Use a URL shortener if your target URL is long. Choose an appropriate error correction level — M is a good default, but use H if you plan to add a logo overlay or print on textured surfaces.

When printing, ensure adequate contrast between the dark modules and the background. Black on white is the most reliable combination. Maintain a quiet zone (white border) around the code — at least 4 modules wide. Test your QR code with multiple scanning apps before distributing it widely, especially at small print sizes.