QRbitr
Private, offline fast file transfer via QR code stream
5 followers
Private, offline fast file transfer via QR code stream
5 followers
QRbitr transfers files & text entirely offline via rapid QR streams. No setup, no pairing, no servers. Works between any devices with a screen & camera. Fast, private, and perfect for secure or air-gapped environments.
I made QRbitr because I often needed to move files between my work laptop and my phone without leaving a trace on the network. At work, IT logs cloud uploads, email, and even USB usage. and, I just wanted something quick, private, and hassle-free.
I didn’t want to install any native apps, so I built QRbitr to run entirely in the browser or as a simple PWA. Getting FPS and frame capture working smoothly in a browser was a challenge - but it works and unique. No servers, no accounts, no Bluetooth pairing. Your data never leaves your devices, so there’s nothing for anyone to snoop on.
It’s simple, private, and works anywhere - even offline. You can try it here, no install needed:
🔗 https://austinwin.github.io/qrbitr/
visit the github to know more about the protocol:
https://github.com/austinwin/qrb...
Example:
I had a large text file on my locked-down laptop. Normally I’d be stuck - email and USB are monitored. With QRbitr, I just opened the app, dropped the file, and my screen turned into a rapid QR stream. On my phone, I scanned it with QRbitr’s Receive mode. Seconds later, the file was on my phone - no network involved. Perfect for quickly sharing short but sensitive text - even when it’s hundreds of thousands of bytes in size.
While building it for privacy, I realized it’s useful for far more than that - like transferring data quickly when there’s no network, no Bluetooth pairing, no cables, no setup at all. It can even go further: by sharing an encryption key between two devices, you can make the transfer 100% secure so that nobody can decode the data except the two devices with the right key.
Large text files are automatically compressed before sending and decompressed on the receiver, making transfers faster. Fountain codes with error recovery ensure it works even if frames are missed.
I’d love to hear your thoughts and ideas for how you’d use it.
GPT-4o
This is truely awesome! The offline, no-server aspect is killer—I'm always paranoid about network security, so the fact that it uses QR codes and keeps everything on my devices is a HUGE plus. Super slick solution for secure, quick file transfers, even without wifi. How's the performance with really large files (like, gigabytes)?