You have probably seen barcodes on most things you buy. They look like a bunch of vertical lines. With some lines being thicker than others.
When you go to buy those products the cashier scans them. That scanner is looking at and "reading" the barcode.
Those lines contain information about a number. The same numbers you see at the bottom of the barcode.
The reason the bars exist is because the computer / scanner can't read the numbers that we can read, but it can read numbers in the form of lines.
Well QR codes are the same thing, except that instead of reading lines from left to right. It can read dots from left to right and from bottom to top.
But why did we create QR codes if barcodes already existed. One reason is that barcodes were designed to be read by laser scanners, like the kind at stores.
But wouldn't it be useful to be able to read printed codes using say your phone?
Yes, yes it would. But it wasn't easy for phones to read barcodes so they had to come up with something else.
Hence the QR Code was born.
There are other benefits to QR codes besides that though. Like the fact that it can store more information than a barcode.
For example you can create a QR code with all your contact information, your phone number, email address, website, etc.
The QR codes you generate are completely free to generate and use. You can use them on anything. Print it, put it on a website, if you wanted to you could even print it on a shirt, on a mug or anything it should still work.
In fact QR codes are designed to work even if part of it gets messed up. So if you print it on paper and spill a drink on it, or write over it by mistake, there's a good chance that it will still work.
Other places you might see QR codes are on print ads like newspapers, magazines, and billboards.
If you wanted you can even get a QR code as a tatoo.
If you have a smart phone you can easy find a QR scanner app from the app store. Some phones like the iPhone have a QR code scanner built right in, just open your camera and point it at a QR code.
The default QR code that is generated is generated as an image. Depending on how you print the QR code and how large you print it images can look blurry.
In those cases if you want to print it so that it looks sharp you can download the svg version.
QR actually stands for Quick Response, I had to look this one up myself. I makes sense. It's faster to scan a QR code than it is to type a link you find in a printed article.
Quite a lot a actually. It depends on a bunch of technical settings, but you can easily have up to 3000 characters, or about 600 words. That's more than a highschool essay.
There are several tools out there for creating QR codes. This site is one of them. We tried to make it as simple as possible.
First you choose what you want your QR code to do. Then when asked you enter the necessary information.
Finally you click "Generate QR Code" and you are done. At that point you can decide whether you want to download it or print it.
You can even download an SVG version or create another code.
QR codes are actually designed to be scanned from any direction. Up side down, sideways, any angle you want.
Yes, again there are many tools to do that, just like that are many phone apps for scanning QR Codes.
In fact this site is also designed to work from you phone as well as from your computer.
Technically no. While black and white offers the most contrast. Which means it is easier for devices to read. Technically QR codes can be in color. In fact it can be in a combination of colors.
If you do decide to use it in color though I would recommend you test it by scanning it with a QR code scanner.