What Is the Best Format for a Logo?
PNG is a common choice for logos that need transparency or crisp edges. SVG may be preferable for vector logos, but if a raster image is required, PNG or transparent WebP can work.
What to do
For a raster logo with transparent areas, compare PNG and WebP if the destination supports both. Do not convert a vector logo to JPG just to make it smaller if transparency or sharp edges matter. The simplest next step is to PNG to WebP. If the issue is actually about jpg to png, see JPG to PNG 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
Can a JPG logo have transparency?
No.
Is PNG good for text and logos?
Often yes because it preserves sharp edges without lossy artifacts.
When is WebP useful for a logo?
When the destination supports it and you want a smaller web delivery file while preserving transparency.