OpenQR

Free, open-source, watermark-free QR code generator. Runs entirely in your browser — no tracking, no sign-up, no limits.

Most online QR generators bait you with "free" and then add a watermark, cap your download size, hide vector export behind a paywall, or route your code through their servers so it dies when you stop paying. A QR code is just an open standard (ISO/IEC 18004) that costs nothing to generate. OpenQR keeps it that way.

This repository is the basic generator tool — the reference open-source implementation. It is deliberately small and easy to fork.

Hosted version: free API, MCP server and editable codes

Everything in this repo is and stays free, with no watermark and no expiry. The hosted build at openqr.uk adds an optional account layer for people who want editable codes and automation:

Dynamic / editable QR codes with scan analytics. Change the destination after you've printed it. 3 free on a free account (7 days of scans by country); unlimited on Pro at £9/month or £72/year, which also unlocks full analytics history, town and region detail, device and referrer breakdowns with CSV export, a branded subdomain, and password-protected codes.
Free REST API. Generate codes and manage dynamic codes programmatically. OpenAPI spec at /openapi.json; interactive docs at openqr.uk/api.
Hosted MCP server at https://openqr.uk/mcp (Streamable HTTP, 17 tools). Generate and manage QR codes directly from Claude, Cursor or any MCP client. Listed in the official MCP Registry. Remote-capable clients connect to that URL directly; stdio-only clients can bridge to it with npx -y @open-qr/mcp and OPENQR_API_KEY set (details).

The static generator in this repository never calls any of that. It stays 100% client-side (see Privacy), and none of it is required to use or self-host the generator.

Tools

The hosted MCP server at https://openqr.uk/mcp exposes these 17 tools. Every tool requires a free API key — create one at openqr.uk/api and pass it as Authorization: Bearer oqr_... on the MCP connection.

Tool	What it does
`generate_qr`	Generate a static QR code from any text or URL. Returns a PNG image or SVG markup.
`create_dynamic_qr`	Create an editable QR code whose destination you can change later without reprinting.
`update_dynamic_qr`	Change a dynamic code's destination, label, custom short link, tags or folder.
`get_dynamic_qr`	Get one code's full details: destination, short link, label, type, tags, folder, status, created date.
`get_scans`	Scan statistics for a dynamic code.
`list_dynamic_qr`	List your dynamic codes with id, short URL, destination, label and status.
`delete_dynamic_qr`	Permanently delete a dynamic code. Its short link stops working.
`bulk_create_dynamic_qr`	Create up to 200 dynamic codes at once.
`list_folders`	List your folders.
`create_folder`	Create a folder to organise codes.
`delete_folder`	Delete a folder. Its codes are un-filed, not deleted.
`list_themes`	List saved style themes. Apply one by passing its id or name as `theme`.
`create_theme`	Save a reusable style theme (colours, dot and corner styles).
`delete_theme`	Delete a saved theme. Codes already styled with it keep their look.
`get_subdomain`	Show the branded subdomain on the account, and whether it is suspended.
`set_subdomain`	Claim or change the branded subdomain so codes also resolve at `{name}.oqr.to`. Pro only.
`clear_subdomain`	Release the branded subdomain. Codes stay live on the plain short link.

It also exposes 5 resources and 4 prompts:

Resources are built-in QR style presets at openqr://preset/classic, /teal, /high-contrast, /dots and /classy. Read one and pass its style to create_theme.
Prompts are create_tracked_qr, bulk_qr_for_print, brand_a_qr and qr_scan_report.

Features

No watermarks, no size limits, no sign-up — every feature is free
Private by design — codes are generated entirely in your browser; the content never touches a server
Export anywhere — PNG / WebP up to 4096px, plus true-vector SVG and PDF
Full styling — colours, gradients, dot & corner styles, logo embedding, "Scan me" frames
Smart input — paste a link or text and the type is auto-detected
Rich payloads — URL, text, email, phone, SMS, WhatsApp, Wi-Fi, and a map-based location picker
One-click copy, shareable design links, light/dark, responsive, keyboard-accessible

Quick start

bash

pnpm install
pnpm dev        # http://localhost:3011

Build & self-host

bash

pnpm build
pnpm start      # serves on :3011 (standalone output)

It's a standard Next.js app — host it anywhere (a VPS, a Raspberry Pi, Cloudflare, behind any reverse proxy). It needs no environment variables, no database, no secrets to run.

Embedding

The <Generator/> component is self-contained and configurable:

server.ts

import { Generator } from "@/components/generator/generator";

// Full page (default OpenQR logo header):
<Generator />

// Embedded widget, your own branding, no default header:
<Generator embedded header={<MyLogo />} />

// Inject your own post-download call-to-action:
<Generator renderSuccess={(variant) => <MySupportCluster variant={variant} />} />

The tool ships zero analytics. If you want anonymous UI events (e.g. which export format was used — never the QR content), inject a handler:

server.ts

import { setTrackHandler } from "@/lib/analytics";
setTrackHandler((action, name, category) => myAnalytics.track(category, action, name));

Privacy

QR generation happens 100% in your browser. The only optional outbound calls are in the Location tool: map tiles from CARTO and address lookups via OpenStreetMap's Nominatim. Nothing else leaves the device.

Tech stack

Next.js 16 (App Router) · React 19 · TypeScript (strict) · Tailwind v4 · qr-code-styling · Leaflet · pnpm.

Contributing

See CONTRIBUTING.md. Keep it simple, accessible, client-side, and free — no feature should ever require payment to remove a watermark or unlock a format.

Licence

You're free to use, study, modify, self-host, and redistribute OpenQR under the AGPL-3.0. If you run a modified version as a network service, the AGPL requires you to make your source available under the same licence. If that doesn't suit your use case, a commercial licence is available — see NOTICE.