If you're making a post about , the joke or concept usually revolves around unnecessary steps, obsessive file management, or "cleaning" an image without actually changing its format.
If repair fails, recovery software (like ) might help, but always keep backups. .png to png
In Photoshop, using the "Export As" function to save a PNG as a new PNG allows you to manually tweak bit-depth and transparency settings. obsessive file management
pngquant or optipng If you have thousands of images, use the terminal. recovery software (like ) might help