QR Code by LifeStep
Generate QR codes as PNG or SVG with size, border and color options

Generate static QR codes in SVG, PNG, JPG, WebP, PDF, or EPS.
QR Code Crafter API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Free QR code generator API for single or bulk static QR codes. OpenAPI, WebMCP, ai.txt, keys, and SVG, PNG, JPG, WebP, PDF, or EPS.
Details from qrcodecrafter.com.

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Generate QR codes as PNG or SVG with size, border and color options
The QR Code Crafter API is provided by QR Code Crafter (qrcodecrafter.com). Free QR code generator API for single or bulk static QR codes. OpenAPI, WebMCP, ai.txt, keys, and SVG, PNG, JPG, WebP, PDF, or EPS.
Yes. The QR Code Crafter API is listed in the Development category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The QR Code Crafter API requires no authentication, so you can start making requests without signing up.
Yes. The QR Code Crafter API supports CORS, so front-end JavaScript can call it directly.
Yes. The QR Code Crafter API is served over HTTPS, so it's safe to use in production.