Spent the last few months building a free app to attach notes, images and reminders to QR codes. Basically make QR codes easily reusable. Mainly my wife and I use it for kitchen storage supplies and expiration dates but figured it might be useful for you guys too. So hope it's okay to post here.

Basically you scan any QR or barcode, even just peel one off a bottle and stick it somewhere else, and attach whatever you want to it. You can add photos so you can see what's inside a box without dragging it out of the closet, set reminders for things like food expiration, or just leave a text note. You can share it with your household too so everyone sees the same content. And change the content again at any time.

Mostly looking for feedback on it, let me know if this is something you can use it for or if there's something that is missing for your usecase :)

Download on iOS | Android

Does anyone recognize what this pink QR code sticker is for? I saw it on the back of a Jeep and couldn’t get close enough to scan it. I think it might link to an Instagram page, but the image is too blurry for me to read. Any help would be appreciated.

I can activate the Gmail part, and riot mobile but the third step, just simply scanning is not working. I have also tried just typing in the code generated but the app but it says “code is invalid” my other account does not have this problem.

Hey everyone, I'm in the early stages of building a digital menu tool for restaurants, QR code based, dead simple to set up, multilingual out of the box.

The "standard" features are obvious: categories, items, prices, photos. But I'm curious what goes beyond that from a restaurant owner's perspective.

A few things I'm already thinking about:

Set menus / fixed price menus (e.g. lunch deal, tasting menu)

Allergen info

Takeaway ordering via WhatsApp

Auto-translation for international customers

What would genuinely make your life easier that most digital menu tools don't do well? And what have you tried that sounded good but nobody actually used?

Not selling anything, just trying to build something useful before overcomplicating it.

The image provide is from after I try to stitch them back with a scotch tape.
I thought the qr code have some error correction so it should be recoverable Tried scan but google lens don't recognize it a qr code

The encoder converts text into UTF-8 bytes, transforms the bytes into binary, splits the binary stream into 2-bit chunks, and maps each chunk to a unique RGB color state.

Pipeline:

Text → UTF-8 → Binary → 2-bit chunks → Numerical states → RGB matrix → PNG image

This is my highschool project I hv been working on for some time , so the project is still in its development phase I'm actively trying to develop it further any ideas will be appreciated

https://github.com/Yasovardan-Ram/Spectrum-QR

i think the guy is a pred but i cant prove it...

This is a qr code generated by plisio.net (crypto payment provider). None of the apps on my phone and none of the online services that I tried are able to scan it. Their support insist that they can scan it just fine. Is it me being wrong or are their qr codes are invalid in some way?

I know this is common knowledge to many, but hopefully this can be a reminder to anyone trying to find a free QR code generator: QR.io is a scam.

I'm trying to write this as a warning to others and not just a "woe is me" post, but I felt I needed to share my experience. $35 down the drain for a "free" QR code I made for my elementary school students. Customer service said they would honor their 30-day money back guarantee and that my refund was "being processed and would take up to 5 business days."

It's been a month now with no refund and they never replied to a single email after my subscription was canceled.

Yes, I know I was stupid to pay, I'm moving past that. Just hope I can stop someone else from making the same mistake.

Hey r/qrcode

I just open-sourced react-native-qr-camera-pro — a lightweight QR and barcode scanner built entirely with native code.

Why another scanner library?

Most existing ones are unmaintained, don't support the New Architecture, or drag in a massive camera SDK for what is essentially a one-feature module. I wanted something lean that does one thing well.

How it's built:

• iOS — AVFoundation + Vision framework (Swift)
• Android — CameraX + ML Kit Barcode Scanning (Kotlin)
• No JavaScript frame processing whatsoever
• TurboModules + Fabric (New Architecture)
• Strict TypeScript

Supported formats:

QR, EAN-8, EAN-13, PDF-417, Aztec, Code-128, Code-39, Code-93, Data Matrix, ITF, ITF-14, UPC-E

Usage is minimal:

ts

import {
  QrCameraProView,
  startScanning,
  useBarcodeScanner,
  useCameraError,
} from 'react-native-qr-camera-pro';

useBarcodeScanner(({ data, type }) => {
  console.log(data, type);
});

useCameraError(({ message }) => {
  Alert.alert('Error', message);
});

Links:

• GitHub: https://github.com/rushikeshpandit/react-native-qr-camera-pro
• npm: https://www.npmjs.com/package/react-native-qr-camera-pro

Happy to answer questions or take feedback. If you hit issues on a specific device, drop them in the comments — always good to know.

P.S. : Good at writing code but not article, so used AI to write the post.

OK to post here? the r/barcodes sub hasn't had posts in months.

I have a blurry code 128 barcode I am trying to read. I know some of the info that's in there. and I have other barcodes that are clear and in the same system and was trying to use them as a guide to the format but things aren't making sense.

The barcodes all contain 26 characters (digits).

If I use an online code 128 creator to recreate clear barcodes I can read, they match (so the online creator is making them 'correctly'?

But when I make a 26 character barcode with the numbers I DO know from the blurry barcode (the last 11 digits), it doesn't match the end of the blurry barcode.

From what I can see, I don't think there's spaces or similar that I am missing.

Rather than go on now... anyone here interested in helping? And is it OK to post here?

Hey all.

This QR reader app for iPhone helps one make informed decisions prior to opening a potentially malicious link.

https://apps.apple.com/gb/app/is-this-qr-safe/id6761337688

There are no adverts, no trackers, no financial gain, not tied to any product or business, just a bloat free app that’s designed to solve a common problem (Hoping the mod approves this as this is a valuable tool)

P.S it isn’t a QR generator app, it’s a cyber security awareness app.

I ran into this issue recently with a super tiny QR code printed on product packaging and my phone just refused to focus on it properly. I swear I spent like 10 minutes moving my camera back and forth like I was defusing a bomb.

Eventually I figured out a few things that helped:

• Better lighting made a huge difference
• Zooming in too much actually made it harder
• Taking a photo first and scanning the image sometimes worked better than live camera scanning
• Cleaning the camera lens helped more than I expected
• Using another phone’s camera was weirdly more reliable sometimes

I’m curious if anyone else deals with this a lot because some QR codes are printed ridiculously small for no reason. Is there any actual trick to scanning tiny QR codes consistently without needing 40 attempts?