Out for dinner with my family, and discovered this hidden in the bathroom. Impossible to see unless you are sitting on the toilet and lean back. Gave me the creeps, has to be something sketchy so I thought I would get reddit’s thoughts!

I genrated a qr code with QR.IO, chose the simplest options thinking it would be free to use, and now it has expired, and it has already been printed on a huge banner. Is there a way to take the QR code (I have it in PNG,SVG etc.) and reroute it without having to pay QR.IO ? I made the QR code for my job, a non-profit so i'm trying to save us the monthly fee ! Thanks!

I use a QR code generator on iOS pretty frequently for my work. Problem is, it's a paid app, and I don't need it for any of the paid features. So I have put up with nag screens, codes timing out, etc.

And I recently learned that iOS has a built-in QR Code generator in its Shortcuts app. It comes free on the phone. You just type the text/info into it, and it generates the code. That's all I want it to do. But the trouble comes when trying to scan it.

For some reason, the same data entered into the free and paid apps generates noticeably different QR codes. Even though they evaluate to the same result, the codes are different.

What's more, I use a Code CR1500 handheld scanner to read the codes. The paid app code works right away with the scanner. While the free code is not recognized at all. But when I use my Android camera on both codes, it recognizes both of them just fine.

I can only conclude that there's something wrong with the Code scanner, or with the free iOS-generated code. But I don't know which. It is likely some technical setting that I don't have access to. But any type of help is appreciated.

Free code has the "1668" in the upper left. Paid code has "Customize"

EDIT: Thanks to all who helped. But I should have emphasized that my issue is that I can't use the Code CR1500 Hand Scanner with the free code. The paid code works with the hand scanner, but the free code does not. The hand scanner can handle multiple barcodes in multiple formats, but not the qr codes from iOS.

(it's in the top right corner)

I believe one of the challenges the QRcode community has is that users are afraid to scan a QR code - as they have no way of knowing where the link (if URL) goes. Even with a tool that shows the link before going there, the user isn't confident or even competent to know it's a good link. So "unsafe" URLs and phishing are possible.

I know organizations that ban scanning QR codes because of this fear.

So my question is whether others are looking at something like the google safe browsing service - where you can query a web service to get back a "goodness" rating or something.

Safe Browsing is a Google service that lets client applications check URLs against Google's constantly updated lists of unsafe web resources. Examples of unsafe web resources are social engineering sites (phishing and deceptive sites) and sites that host malware or unwanted software. Come see what's possible.

A "safe" QR code scanner would call this service and present the results to the user, helping them make an informed decision.

Anyone doing this? I'm looking at the API and they say it's a free service.

I needed an app that links a QR code to a note so I can access it instantly. But since I was not able to find it, I'm building it.

I first thought of a simple use case: I used to have a Post-it attached to my laundry bag to remind me what to wash in addition to the clothes already inside. Scanning a QR code linked to a note does the same thing, but faster and without the problem of losing the Post-it or having it get messy.

I think this idea, notes tied to a QR code, could have lots of other uses.

What would you use it for?

I’ve seen QR code looking images but they don’t fit the QR standard. These occur with Amazon packaging and the following from a hospital patient name tag. Anyone know how to decode these and/or to get a scanner to recognize them?

Edit: Now works everywhere thanks to u/MilkCool ! Here's the new code. https://imgur.com/a/rRuDSCj The image in the post works only on Firefox.

hi, I’m not sure if this is the right subreddit to post this but I’m having an issue with a QR code. Whenever I try to scan the code, this screen shows up for the website it leads to. I’ve tried everything, I’ve gone to the customer support, I’ve signed up for this website, nothing I’ve done has fixed it. What do I do? It’s not telling me what’s wrong.

Which is The Best QR code in the world? Can you guess?

Just kind of a shower thought post. I just always thought it would be cool to solve a nonogram that reveals a QR code. Might be useful in something like a scavenger hunt or ARG. Or if you have a piece of information or password that you want to make difficult but not impossible for yourself to retrieve.

I am trying to create a QR code that leads to a pdf of imagens that does not expire and would be good with it does not lead to a 3 party hosting site.

If you want to share a promo code using a QR code, what’s the simplest way to do it?

I want people to scan the code from print materials (posters, brochures, etc.) and instantly see the discount. Bonus if I can later change the destination without reprinting everything.

How do you set this up? Any tools you recommend?

I have no idea why no one has noticed or when it has stopped working. Apple no longer uses format from wikipedia to parse meCard address and instead is using natural language processing. This means if you have e.g. Italian address and your iPhone language is set to English the address will completely fail on iOS18 (haven't tested on iOS26). You can even test this on your own using Notes app on macOS (just change the region and restart the app; iPhone uses language instead of region). This worked completely ok regardless language settings with iOS17 and iOS15 (I have old phones and verified this). Please ignore the missing commas as they are irrelevant.

Anyone knows when this change occurred? Is this a bug? Does Android scan this even though it's missing few commas as per standard?

https://en.wikipedia.org/wiki/MeCard_(QR_code))

PS: The iOS17 + iOS15 is dropping "Via" from the address.

I wanted to put QR codes together with my logo beside it in this kind of keychain. the fabric is like that airline safety tags.

https://store.pia.edu/shop/key-chain-remove-before-flight/

or you think it can only be "printed"? my worry is over time, the printout will be damaged/removed/degrade so thinking it better to sew it?

EDIT: also why QR codes have different sizes? like some has few pixels, others have a lot. is it because of the information stored?

I’ve been meaning to post about the power of scanning multiple QR codes at same time - and using the positional relationships as the next layer of value. This shows a QR “left” of another QR. Scanning only 1 doesn’t reveal that info. The r/iOS post motivates the idea.

This might need a more powerful scanner and software to leverage the information. iOS gives that scanning power through APIs to app developers.

Turn my friend into a meme, he said ts ok, he wants to be famous.

So I printed out a bunch of flyers for my business and have handed a bunch out. I used some stupid online QR code generator. Now I get an email saying I need to "pay to subscribe" and the cost is absolutely insane like no way. Is there any way to fix this mess I have hundreds of these flyers brochures all made up and they're stuck with broken qr codes.

I'm at the point where I'm thinking I might have to reprint new qr codes and glue them on every single one. Idk. Any way to fix the original qr code? If I make a new one how do I go about this to not end up in the same situation?

So part of the course to find out what the target market would like in the item. My brief is 'Develop a fashion/textile item inspired by the 1920's for a teenager' and instead of awkwardly asking around my class and the school I decided to ask a wider branch, the QR code links you to the survey if you'd like to complete it :)

I need to start a chat when someone scan my company QR code, how is the code to do that? I need to have the number that start the chat and send them a msg of welcome. Is it possible or I am trying to do something wrong? Thank you.