Free QR Code Generator with Logo

A QR code is a two-dimensional barcode. Dark and light modules encode data so a phone camera can recover text without typing. GenShelf creates static codes: the URL or text lives in the pattern itself. There is no GenShelf short-link, no scan counter, and no expiry tied to this website.

Static is a constraint as well as a feature. If you print a campaign URL you do not control, you cannot retarget later. For posters you might reprint, encode a short URL on a domain you own and redirect. For a one-off Wi‑Fi join string or a card you will reprint anyway, encoding the destination directly is simpler.

The page uses the qrcode library in your browser. It draws the matrix onto an offscreen canvas, then paints the visible preview. Quiet-zone margin is two modules. Pixel sizes are 128, 256, 512, and 1024. Download exports that canvas as a PNG — the file is created locally, not fetched from a server.

Error correction is M (about 15% recovery) when there is no logo, and H (about 30%) when you add one. The logo is not “baked into” the QR library. After the matrix is drawn, GenShelf overlays your image in the center with optional padding, background, border, and corner radius. That overlay covers modules on purpose; H-level correction is what makes a small mark recoverable.

• Menus, posters, and packaging that open a product or booking page
• Business cards that open a portfolio or contact page
• Wi‑Fi join strings (WIFI: format) or event check-in links
• Packaging that deep-links to instructions or warranty pages

Prefer HTTPS destinations you own. Put a human-readable URL under printed codes so people can see where they are going if the camera fails.

A 256-pixel PNG is enough for on-screen use and small stickers. Use 512 or 1024 when the code will be printed large or scanned from farther away. A practical print rule is roughly one inch of code width for every few feet of scan distance — then verify in the real lighting, not only on your laptop.

Dark modules on a light background remain the most reliable combination. Light-on-dark (the inverted preset) can fail on some cameras. Do not crowd art or captions into the quiet zone around the square.

• Logo too large relative to the matrix
• Low contrast (pastel on pastel, or gray on cream)
• Glossy laminate catching overhead lights
• Code printed too small for the expected distance
• Quiet zone cropped by a tight crop or a busy background
• Payload so long that the matrix is dense and fragile

Test on at least two phones after printing. Screens hide glare that paper shows. More detail: logos and scan rates and print-ready sizing.

Your text, colors, and logo never leave this device for generation. The logo file is read in memory as a data URL. There is no upload API. Closing the tab discards the preview. Anyone who photographs the finished PNG can still read the payload — do not encode passwords, private tokens, or internal admin URLs.