Generador de códigos QR
Crea un código para la última página de un libro en tapa blanda, un marcapáginas o una mesa en una feria — y comprueba, antes de imprimirlo, que un móvil sigue leyéndolo.
- 100% free
- No account
- No watermark
- Codes never expire
- Built in your browser
Preguntas que hacen los autores
At least 2 cm wide. Below roughly that, a phone camera struggles to focus at all, whatever the code contains. For placement, a code is readable from about ten times its own width away — so a 3 cm code on a bookmark works at arm's length, and a poster read from three metres wants one around 30 cm.
Yes, with one rule that matters more than taste: keep the dark colour on the modules and the light one behind them, and keep the contrast between them above 4.5 to 1. Pale ink on a tinted page is the most common way a code that looked fine on screen dies on paper. Inverted codes — light modules on a dark background — are legal but refused outright by many phone cameras. This tool scores the contrast as you change it.
Not if it stays small. A QR code carries error correction, so part of it can be missing and still be read — but that budget is finite. Keep the logo under about a quarter of the surface, and let the strongest correction level be switched on for you, which happens automatically here. This tool also decodes the finished code back to prove the data survived.
SVG whenever your designer or your cover template accepts one. A vector is resolution-independent, so it cannot go soft at whatever size it lands on the page. A PNG works perfectly well too — it just has to be exported large enough to begin with, which is why 2048 px is offered here.
It is part of the code, not decoration. That empty margin is how a scanner works out where the pattern ends. Four modules is the specified minimum, and pushing a code tight against a page edge, an image or a line of text is what removes it.
Wherever it removes typing. The last page, pointing at the review form, is the strongest: the moment a reader closes a book is the moment they are most inclined to say something about it. The front matter works for a bonus chapter or a newsletter. Bookmarks and signing-table signs work because a QR code is the only way a stranger takes your link home. One place to avoid: inside an ebook — nobody scans the screen they are reading on.
Not with a plain QR code — it encodes the address itself, permanently. That is what smart links are for: the code encodes a short address you keep, so the destination can change afterwards, you see how many scans it gets, and each reader is sent to their own Amazon store rather than to one country's.
Yes. No account, no watermark, and the codes never expire. Everything runs in your browser, so nothing you type is sent to us or stored anywhere.
Una cosa que esta herramienta gratuita no puede hacer
El código que descargas aquí es fijo: codifica para siempre la dirección que has escrito. Está bien para un enlace que controlas — pero si la página cambia alguna vez, cada copia impresa apunta a la nada, y nunca sabrás cuánta gente lo escaneó.
Los smart links de TrueRoyalties resuelven justo eso. El código codifica una dirección corta que es tuya: puedes cambiar a dónde lleva después de imprimir el libro, ves cuántos escaneos recibe y cada lector va a su propia tienda de Amazon en lugar de a la de un solo país.