PixDuplicate is a website and a Progressive Web App where you can select a folder from your system (mobile or PC) to scan for duplicate or similar images. If your browser supports the new File System API, you can delete them completely from your system to save space, or simply move them to a new duplicates folder, where you can later decide what to do with them.
If you have any suggestions for the site in terms of design or functionality, please feel free to leave your feedback in the comments.
Thank you! :)