Mini-QR

Description

Mini-QR is a lightweight, self-hosted web application for generating QR codes instantly and privately.
It provides a minimal and elegant interface to convert any text, URL, or message into a QR code directly in your browser, without external tracking or dependencies.

Overview

Mini-QR is designed for simplicity, privacy, and speed.
It offers an ad-free interface that works entirely within your local environment, making it ideal for individuals, organizations, and educational institutions that value data sovereignty.
The app runs as a single Docker container and requires no database or backend setup, enabling secure and frictionless QR generation anywhere.

Cosmos

The diagram places Mini-QR in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).

flowchart LR
    subgraph deps [Dependencies]
        dep_svc_db_redis["svc-db-redis 🐳🐝"]
        dep_svc_net_tor["svc-net-tor 🐳🐝"]
        dep_web_app_dashboard["web-app-dashboard 🐳🐝"]
        dep_web_app_keycloak["web-app-keycloak 🐳🐝"]
        dep_web_app_matomo["web-app-matomo 🐳🐝"]
        dep_web_app_prometheus["web-app-prometheus 🐳🐝"]
        dep_web_svc_css["web-svc-css 💻"]
    end
    subgraph role [web-app-mini-qr 🐳🐝]
        svc_mini_qr["mini-qr"]
        svc_logout["logout ❌"]
        svc_sso["sso ❌"]
        svc_dashboard["dashboard"]
        svc_matomo["matomo"]
        svc_redis["redis"]
        svc_css["css"]
        svc_prometheus["prometheus"]
        svc_tor["tor"]
    end
    dep_svc_db_redis -. "0..1" .-> svc_redis
    dep_svc_net_tor -. "0..1" .-> svc_tor
    dep_web_app_dashboard -. "0..1" .-> svc_dashboard
    dep_web_app_keycloak -- "0..0" --> svc_sso
    dep_web_app_matomo -. "0..1" .-> svc_matomo
    dep_web_app_prometheus -. "0..1" .-> svc_prometheus
    dep_web_svc_css -. "0..1" .-> svc_css
    linkStyle 3 stroke:red;

Solid 1:1 edges are fixed relationships; dashed 0..1 edges are conditional (enabled only in matching deployments); red 0..0 edges are turned off in this role. Node markers show the role’s deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in meta/main.yml.

Features

  • Instant QR code creation: simply type or paste your content.

  • Privacy-friendly: all generation happens client-side; no data leaves your server.

  • Open Source: fully auditable and modifiable for custom integrations.

  • Responsive Design: optimized for both desktop and mobile devices.

  • Docker-ready: can be deployed in seconds using the official image.

Quick Setup

Development

Clone, set up the workstation, and deploy Mini-QR onto the local stack:

git clone https://github.com/infinito-nexus/core.git
cd core
make onboard
make compose-deploy mode=reinstall apps=web-app-mini-qr full_cycle=false

Production

Run the published image to provision the inventory and deploy Mini-QR to a managed server (the mounted volume persists the inventory):

APP=web-app-mini-qr
HOST=<your-server>
DOMAIN=<your-domain>
TLS_MODE=self_signed
SSH_PUBLIC_KEY="<your-ssh-public-key>"

docker run --rm -it \
  -v "$PWD/inventories:/etc/infinito.nexus/inventories" \
  -e APP="$APP" -e HOST="$HOST" -e DOMAIN="$DOMAIN" -e TLS_MODE="$TLS_MODE" -e SSH_PUBLIC_KEY="$SSH_PUBLIC_KEY" \
  ghcr.io/infinito-nexus/core/debian bash -c '
    INVENTORY=/etc/infinito.nexus/inventories/production
    infinito administration inventory provision "$INVENTORY" \
      --inventory-file "$INVENTORY/devices.yml" \
      --host "$HOST" \
      --include "$APP" \
      --vars "{\"TLS_MODE\": \"$TLS_MODE\", \"DOMAIN_PRIMARY\": \"$DOMAIN\", \"users\": {\"administrator\": {\"authorized_keys\": [\"$SSH_PUBLIC_KEY\"]}}}" &&
    infinito administration deploy dedicated "$INVENTORY/devices.yml" \
      --password-file "$INVENTORY/.password" \
      --diff -vv'

Further Resources

Persona contract opt-outs

meta/services.yml pins sso.enabled, logout.enabled and redis.enabled to false; the upstream image is a client-side QR generator with no accounts and no server-side session. There is nothing for the biber or administrator persona to log in to, so templates/playwright.env.j2 declares PERSONA_BIBER_BLOCKED=true and PERSONA_ADMINISTRATOR_BLOCKED=true. The guest persona and the baseline reachability assertions run unconditionally.

Credits

Implemented by Kevin Veen-Birkenbach. Part of the Infinito.Nexus Project and maintained by Kevin Veen-Birkenbach. Licensed under the Infinito.Nexus Community License (Non-Commercial).