# bashalarmistalt/decimen-optical-transfer

Repository: https://github.com/bashalarmistalt/decimen-optical-transfer
Canonical: https://ross.abutalabs.com/products/decimen-optical-transfer
Homepage: https://decimen.app/
Language: TypeScript
License: AGPL-3.0
License Family: copyleft
Last push: 2026-08-26T12:51:11+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 2
- inputs: {"age_days": 34, "days_push": 7, "days_rel": 14, "gap_med": 2, "n_releases_24m": 8}
- flags: young
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6504, forks 790 (observed 2026-08-28T04:09:43.765047+00:00)

## What it is
A web application that transfers files between devices using animated QR codes displayed on one screen and captured by another device's camera, requiring no network connection. It uses fountain coding for error resilience, supports files up to 64 MB, verifies integrity with SHA-256, and works offline as an installable PWA.

## Use cases
- transfer a file to a phone with no internet connection
- move photos between devices without pairing or accounts
- send files across an air gap using only screen and camera
- share a file with someone by displaying animated QR codes
- receive a file by pointing a camera at a screen
- export a QR animation so any camera can receive the file later
- transfer data between devices with no shared network

## When to choose
- you need to move a file between devices with no network path between them
- you want a zero-install, browser-based transfer that works offline
- you need air-gapped transfer without pairing, accounts, or cloud storage

## When to avoid
- you need confidentiality - the stream is unencrypted and readable by any camera
- you need to transfer files larger than 64 MB
- you need high-speed bulk transfer over long distances

## Facets
- artifact type: application
- maturity: active
- function: file-upload, image-processing, compression, developer-tools
- domain: files, privacy, cross-platform, web-development
- platform: browser, cross-platform
- tags: qr-codes, fountain-codes, air-gap, offline-transfer, optical-transfer, pwa, camera, no-network, web, android, ios

## Member repositories
- bashalarmistalt/decimen-optical-transfer (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:43.765047+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 2026-08-29T17:44:28.723094+00:00, confidence not recorded.
  - readme: https://github.com/bashalarmistalt/decimen-optical-transfer (fetched 2026-08-28T04:09:43.765047+00:00, sha 1e54f3ae73c6)
  - homepage: https://decimen.app/ (fetched 2026-08-29T08:41:01.425764+00:00, sha 050092a5ddb8)
- Data as of 2026-08-30T08:39:29.467469+00:00.