QR.

What is QR.?

QR. is a dynamic QR code API built specifically for developers who need more than a static image generator. It lets you mint, print, route, and observe QR codes programmatically — meaning you can change where a code points at any time without reprinting a single sticker, label, or package. The service handles the entire lifecycle over HTTP: create codes with metadata and UTM tags, export them as PNG, SVG, or print-ready PDF, route scans at the edge by device or country, and collect analytics via webhooks. A free tier includes 20 dynamic QR codes per month with unlimited scans, and there's even a no-signup generator for quick one-off use.

Who it's for

• Backend engineers who want to manage QR codes as part of their API surface, not through a clunky dashboard.
• Product and growth teams running campaigns or A/B tests that need to swap landing pages or app store links without reordering physical collateral.
• Operations folks managing inventory, store listings, or printed materials across multiple regions and need device- or country-aware redirects.

Key features

Mint and print in code

Create QR codes over HTTP with metadata, UTM parameters, batch support, and lifecycle controls like expiration or max scan limits. Export options include PNG, SVG, and print-ready PDF — with custom styling and logo placement when your brand requires it.

Edge routing rules

Scans resolve at the edge using a priority order: device → country → time → A/B → default destination. You can send iOS users to the App Store, Android users to Google Play, or show different content by time zone — all with a single printed code. Password gating is available on any plan.

PATCH to change destinations

The core promise is simple: print once, update forever. A single PATCH request to the short link changes where all future scans go, with zero impact on the physical code already in the wild.

Observability built in

Signed webhooks and an analytics REST API give you scan data without blocking the redirect itself. You get event-level visibility into who scanned, from where, and on what device — ready to pipe into your own data stack.

What stands out

"Owning mint, print, live links, routing, and scan events at scale is the real product."

Most QR tools stop at PNG generation. QR. treats the entire lifecycle as one API spine — from creation to redirect to analytics — so you're not bolting a generator onto a separate redirect service and hoping it holds together. The edge network on go.qrdot.dev handles redirects with low latency, and official SDKs for Node, Python, Go, PHP, and Ruby mean you can integrate before your standup ends. The free tier is genuinely usable for small projects, and the no-signup generator removes friction for quick experiments.

Worth checking out if…

You're shipping physical QR codes that need to survive product launches, campaign changes, or regional rollouts without reprinting. If you've ever rebuilt a QR code because a URL changed, or hacked together a redirect service to avoid that pain, QR. gives you a cleaner path. It's also a strong fit if you need device-aware routing, A/B testing on printed materials, or scan analytics wired directly into your existing monitoring and data pipelines.