How many QR codes can be generated?

  • More than the atoms in the universe (estimated to be 10x10x10… 81 times).

    More than all the email addresses created and yet to be created….

    It is a really really large number. The Wikipedia article mentions that it can have 7089 numeric only characters: ie equivalent to

    10x10x10….. 7089 times
    (each character can be 0-9).

    There is nothing magical about QR Codes. It is just machine speak and the storage dictates how much you can write. So how many different numbers can you write if you have a paper grid with 7089 squares ?

    Or if you have a sheet of paper in which you can type up-to 4296 alpha-numeric characters. How many different essays can you compose ? Mind-bogglingly large (if you want to calculate, it is 45x45x45 ……. 4296 times!)

    This picture illustrates the point. On the right is the QR Code machine speak version of the English text on the left.

    The maximum capacity for a standard QR code (according to Wikipedia) is 2,953 bytes or 23,624 bits. Each bit has two states, so the number of possible permutations is 2^23624 or about 3.4*10^7111.

    For now, data storage has a finite density and is limited by the size of the medium. The number of possible permutations will increase with the size or density of the QR code, so a (non-standard) infinitely large or infinitely dense QR code would have an infinite amount of permutations.

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    The maximum capacity for a standard QR code (according to Wikipedia) is 2,953 bytes or 23,624 bits. Each bit has two states, so the number of possible permutations is 2^23624 or about 3.4*10^7111. For now, data storage has a finite density and is limited by the size of the medium.

    You can think of QR codes as containers of any text, up to 7089 characters (if only digits, due to compression), 4296 if text.

    The neat thing about QR codes is that semantics are defined for the content, so a scanner/reader app should interpret e.g. http: // quora . com as a link and would normally open a browser to show that page.

    If it contains a link the resulting information perceived by the user could be much greater than what is actually stored in the QR code.

    My own CliqTags QR Code Reader – Android Apps on Google Play handles such semantics, but also performs a Google search if the content can’t be interpreted any other way.

    How many string of characters can be generated? That many.

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    Easily fix typos, grammatical mistakes, and other common issues before you hit send.

    There is no limit to the number of QR codes that can be generated, this is an open platform. You can encode whatever you like into a QR, and there is no central repository or checks of any kind on what that content is. Subsequently, just as two persons might write a tweet with the exact same wording, you might come across two separate QR’s with the same content.

    A QR code is nothing more than a short piece of text – encoded in a way that computer cameras can read (but humans cannot…at least not easily).

    What you use that text for is entirely up to you.

    Very commonly, they store the URL of a web page – but they can store pretty much anything.

    You can make QR codes that are more or less unique – or you can make a whole bunch of them that are the same.

    Just think of a QR code as being somewhere between a line of text – or maybe a paragraph or two.

    This QR code contains the text of this Quora answer (except for this sentence).

    Here are 25 of the coolest gifts for this Christmas.

    We’ve put together a list of incredible gifts that are selling out fast. Don’t wait until it’s too late!

    The information encoded in a particular QR Code is not protected in any way. This is different from UPC & EAN Barcodes which come from a global system, must be globally unique and are restricted to 12 or 13 digits & therefore have limited combinations.

    QR Codes can have any information encoded in them you want. This information is literally encoded in the QR Code, so while you can’t stop anyone producing the same QR Code as you – it is not practical for someone to do this, as the QR Code would have your message or your URL encoded in it.

    While UPC Barcodes are limited to numbers and 12 digits allowing for relatively few permutations;

    QR Codes can encode up to 1028 characters. This includes letters, numbers and non-alphanumeric characters – With these quantities the potential variations are essentially limitless.

    It was originally answered that: The maximum capacity for a standard QR code (according to Wikipedia) is 2,953 bytes or 23,624 bits. Each bit has two states, so the number of possible permutations is 2^23624 or about 3.4*10^7111.

    The information stored in a QR Code is usually URLs, but anything can be stored, from contact data to calendar data, email addresses, phone numbers, SMS opening, plain text, and geolocation.

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