What is a dynamic QR code and how is it different from a static one?

A static QR code encodes its destination URL directly into the image — if you change the URL, every printed QR becomes a dead link. A dynamic QR code encodes a short redirect (like qrth.is/r/abc) that you can re-target from a dashboard anytime, so the printed image keeps working even when the destination changes.

Can I change where my QR code points to after printing?

Yes — with a dynamic QR code. Print it once on a menu, business card, or flyer. Open your QRThis dashboard, click the QR, and update the destination URL. The change applies instantly. No reprinting, no redistributing.

Is QRThis free? What's the catch?

Static QR codes are free forever with no signup, no email, no watermark. The free public API allows 100 requests per IP per day. There is no catch on the static side. Dynamic QR codes (editable destinations + scan analytics) are free for the first one, then $29 one-time for unlimited — no subscription.

How many QR codes can I generate per day on the free tier?

Unlimited static QR codes from the homepage tool. The public API is rate-limited to 100 requests per IP per day, which is far more than most public sites need — images are cached aggressively by the CDN so a single QR is usually generated once and served from cache for hours after.

Do QR codes from QRThis expire?

No. QR codes you generate never expire. Static QRs work forever because the URL is encoded directly in the image. Dynamic QRs keep working as long as your QRThis account is active (free or Pro) — the redirect stays live and you can re-target the destination anytime.

Can I use QRThis QR codes commercially?

Yes. QR codes you generate are yours to use however you want — on commercial products, paid marketing, client work, packaging, anywhere. No license, no attribution requirement, no per-use fee. The image is just an encoding of your URL; QRThis does not claim any rights to it.

Does QRThis have an API?

Yes. The endpoint is https://www.qrth.is/api/generate?url=YOUR_URL. It returns a PNG by default, or SVG with format=svg. No API key, no signup, no auth headers — just a plain GET request. Customize with size, color, bg, and margin query parameters. CORS is open. Rate limit is 100 requests per IP per day.

QRThis

Pricing Sign in

Free dynamic QR codes you can edit anytime.

Static QR codes free forever. Editable destinations without reprinting.

https://

Options

Preview

Live preview

Generate a QR above to see it preview here.

Logo · optional

Add a logo

PNG, JPG, or WebP · 2 MB max · processed in your browser

Size

Foreground

#1D1D1B

Background

#FFFFFFTransparent

QR codes generated

Dynamic QR codes.
Edit the destination forever.

Print it on a menu, a flyer, a business card — then change where it points to without reprinting. First one's free.

Static QR

URL is baked into the image. Change the URL → reprint.

Dynamic QR

Image stays the same. Change the destination from your dashboard.

Make a dynamic QR →See pricing

Or use the API

One GET request. No auth, no signup. Drop the URL into an <img> tag from any origin.

Endpoint

GET https://www.qrth.is/api/generate

Parameters

Param	Default	Description
urlreq	—	The URL to encode. https:// is prepended if missing.
size	512	Image size in px (square). Min 64, max 2048.
format	png	Output format: png or svg.
color	000000	Foreground hex color, no #.
bg	transparent	Background hex color (no #) or 'transparent'.
margin	2	Quiet zone in module units.

Examples

Basic

https://www.qrth.is/api/generate?url=example.com

Custom colors

https://www.qrth.is/api/generate?url=example.com&color=4CAF50&bg=FFFFFF

SVG output, 1024px

https://www.qrth.is/api/generate?url=example.com&format=svg&size=1024

Response

Returns the image bytes directly with image/png or image/svg+xml content type. Cached for 24 hours. CORS open to all origins.

Rate limits

100 requests per day per IP on the free tier. The 101st request returns 429. Every response includes:

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 87
X-RateLimit-Reset: 1715000000

Errors

400Missing or invalid URL, color, or format

429Rate limit exceeded

500Generation failed

Free dynamic QR codes you can edit anytime.

Dynamic QR codes.
Edit the destination forever.

Or use the API

Endpoint

Parameters

Examples

Response

Rate limits

Errors

Guides & QR tools

More th.is tools

Free dynamic QR codes you can edit anytime.

Dynamic QR codes.Edit the destination forever.

Or use the API

Endpoint

Parameters

Examples

Response

Rate limits

Errors

Guides & QR tools

More th.is tools

Dynamic QR codes.
Edit the destination forever.