Certthor QR Code API

General-purpose QR generator (qrserver-compatible). Encode any payload: URL, text, WiFi, vCard, SEPA/EPC, and more.

→ Interactive QR UI — enter a website and preview the code instantly.

Endpoint

GET|POST https://api.certthor.com/v1/create-qr-code/

Live sample → https://certthor.com

Parameters

Name	Description
`data`	Required. Any UTF-8 string to encode (alias: `text`).
`size`	`200` or `200x200` (50–2000, default 200).
`ecc`	Error correction: `L` `M` `Q` `H` (default `M`).
`margin`	Quiet zone modules (default 4).
`format`	`png` (default) or `svg`.
`color`	Foreground hex, e.g. `000000`.
`bgcolor`	Background hex, e.g. `ffffff`.

Examples

# URL
curl -sL "https://api.certthor.com/v1/create-qr-code/?size=200x200&data=https%3A%2F%2Fcertthor.com" -o qr.png

# Plain text
curl -sL "https://api.certthor.com/v1/create-qr-code/?data=Hello%20World" -o hello.png

# WiFi
curl -sL "https://api.certthor.com/v1/create-qr-code/?data=WIFI%3AT%3AWPA%3BS%3AMyNet%3BP%3Asecret%3B%3B" -o wifi.png

# SVG + brand color
curl -sL "https://api.certthor.com/v1/create-qr-code/?format=svg&color=0f766e&data=Certthor" -o qr.svg

Canonical host: https://api.certthor.com (www.api.certthor.com redirects here).