# qifi-dev/qrs

Stream data through multiple series of QR codes

Repository: https://github.com/qifi-dev/qrs
Canonical: https://ross.abutalabs.com/products/qrs
Homepage: https://qrss.netlify.app/
Language: TypeScript
License: MIT
License Family: permissive
Topics: qrcode, transfer-files
Last push: 2026-03-11T11:09:15+00:00

## Health v2 (maintenance only)
Score: 54/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 71, release rhythm 35, longevity 50
- inputs: {"age_days": 701, "days_push": 175, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1670, forks 107 (observed 2026-08-28T04:05:20.025792+00:00)

## What it is
Qrs is a TypeScript tool that streams arbitrary data through a series of QR codes, enabling file transfer without a network connection. It uses Luby Transform (fountain) coding so a receiver can reconstruct the data from any sufficient subset of scanned frames, and ships a CLI plus a QR generation library.

## Use cases
- transfer files between devices with no network or cable
- airgap data exfiltration-free transfer via camera scanning
- send files to a phone by displaying scrolling QR codes
- recover data even if some QR frames are missed
- embed QR-based data streaming into a Node.js app

## When to choose
- you need offline, network-free file transfer between a screen and a camera
- you want loss-tolerant transmission via fountain codes
- you want a CLI or library for QR code data streaming

## When to avoid
- you need fast bulk transfers of large files
- you have a normal network connection available
- you need bidirectional real-time communication

## Facets
- artifact type: library
- maturity: active
- function: serialization, cli, sdk
- domain: files, developer-tools, cross-platform
- platform: cli, cross-platform
- tags: qrcode, file-transfer, fountain-codes, luby-transform, airgap, data-transmission, nodejs, web-server

## Member repositories
- qifi-dev/qrs (main) score 54

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:20.025792+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:42:45.302851+00:00, confidence not recorded.
  - readme: https://github.com/qifi-dev/qrs (fetched 2026-08-28T04:05:20.025792+00:00, sha b3bf5947ec64)
  - homepage: https://qrss.netlify.app/ (fetched 2026-08-29T11:16:16.059764+00:00, sha 44136fa355b3)
- Data as of 2026-08-30T08:39:29.467469+00:00.