Universal vCard, URL, tel, SMS, email, geo, Wi-Fi, and UPI QR formats
Engineering case studyShobhit Tripathi / 2026
02 / Universal QR / Offline Data Transfer
QRMesh
02
01Data→
02Encode→
03QR frames→
04Scan→
05Verify→
06Decode
01 Overview
THE SYSTEM,
IN CONTEXT.
QRMesh chooses standard QR formats for contacts, links, calls, SMS, email, locations, Wi-Fi, and UPI. Files and advanced data use its own QM2 multi-frame protocol.
Small cross-device transfers should not always require a cloud account or an online relay. QRMesh keeps supported actions universal and moves richer payloads directly between screens and cameras.
02 System workflow
01Data
02Encode
03QR frames
04Scan
05Verify
06Decode
03 Key features
QM2 multi-frame transfer for images, audio, PDFs, and small files
Compression, frame splitting, reassembly, and restoration
SHA-256 integrity and optional AES-GCM encryption
Explicit confirmation before high-risk actions
Offline PWA with local history and settings
04 Engineering
BUILT AS
A WORKING SYSTEM.
The implementation is presented from its verified live behavior and public source. No usage metrics or unverified performance claims are included.
React 19TypeScriptViteTailwind CSSqrcodejsQRPakoWeb CryptoVitest
05 Current state
Live offline-first web application
The deployed application can be opened from the live demo link.