Questions about PNG and WebP
Does transparency survive the conversion?
Yes. WebP carries an alpha channel just like PNG, so a logo with a see-through background stays see-through. This is the main reason WebP replaced PNG rather than sitting beside it.
Why is my PNG so enormous?
Because PNG never discards anything. That is exactly what you want for a screenshot with sharp text, and exactly what you do not want for a photograph, where the eye cannot tell that the sky is stored in ten thousand slightly different blues.
Is there ever a reason to keep PNG?
Two. Favicons and small interface icons, where the file is tiny anyway and PNG has no rival for compatibility. And anything heading into print or a design tool that expects lossless input.
Are my images really not uploaded?
Correct. The conversion uses your browser's own image engine, so the file is read from your disk into the tab and never sent over the network. Open your browser's network panel and convert something — no request is made.
How does the target size work?
The converter encodes your image, checks the result against your target, and adjusts quality until it fits. If quality alone cannot get there, it reduces the dimensions in steps rather than destroying the picture. You always see what happened.
Is there a limit on how many files I can convert?
None from us — your computer does the work, not our server. The practical ceiling is around 40 megapixels per image, where browsers stop being reliable.