CORS check 

Can I send this image or font in my email?

Wondering if an image or font you want to use in your email is blocked due to CORS (https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) (Cross-Origin Resource Sharing) restrictions? Our CORS check tool makes it easy to find out. Simply plug in the URL of your image, font, or hosted asset, and we’ll tell you if it’s safe to use in your email. Avoid issues like broken images or missing fonts by ensuring your assets are CORS-compatible before sending.