RespImageLint is a bookmarklet that checks images of a webpage against a list of common mistakes and best practises.
Go to ausi.github.io/respimagelint, add the bookmarklet to your browser toolbar and run it on your website.
If the bookmarklet doesn’t work for you because of security restrictions of your browser there is a Chrome extension available created by Peter Neumann: \ https://github.com/peter-neumann-dev/responsive-image-linter
Thanks to all sponsors that help to bring this project forward. You can become a sponsor now too.
MIT