What Is the Best Format for a Screenshot?
PNG is often a good choice for screenshots containing text, interface elements and sharp lines because it preserves those details without lossy artifacts.
What to do
If file size is more important and the screenshot is mainly photographic or you have tested the result, WebP can be worth considering. The simplest next step is to PNG to WebP. If the issue is actually about png to jpg, see PNG to JPG as well.
Why this happens
Image problems often come from three separate variables: pixel dimensions, encoded file size and file format. Changing one does not automatically solve the others. A very large photo may need resizing even when its format is already JPG; a transparent graphic may need PNG or WebP even when the file size is acceptable; and an upload limit may be measured in megabytes rather than pixels.
Before editing, check the requirements of the place where the image will be used. That gives you a concrete target and reduces unnecessary quality loss. When possible, keep the original file and create a delivery copy for the specific destination.
Common questions
Why can JPG make text look worse?
Lossy compression can create ringing or block-like artifacts around high-contrast edges such as small text.
Can screenshots use WebP?
Yes, if the destination supports it and the result looks good.
Should I use PNG for every screenshot?
Not necessarily. Compare the actual file size and visual quality for your workflow.