Keep PNG or WebP when transparency is required. JPEG cannot store transparency, so transparent pixels must be filled with white, black or another chosen color.
Transparency is stored information
A transparent PNG does not contain a white background. It stores an alpha value for each pixel, and the app’s own background shows through.
A dark viewer can therefore make transparent areas look black even when the file is still correct. Test it over a white background.
JPEG removes transparency
JPEG has no transparency channel. Converting from PNG requires the empty area to be filled with a color, which explains many unexpected black backgrounds.
Use PNG for logos, cut-outs and overlays. Use JPEG or WebP for ordinary photographs where transparency is not needed.
Match the format to the destination
PNG offers broad support for transparent graphics; WebP may be smaller for the web. Older software and submission systems may not accept WebP.
- Transparency: PNG or WebP
- Lightweight photos: JPEG or WebP
- Maximum compatibility: JPEG or PNG
Check edges after conversion
View the result on both light and dark backgrounds. Zoom in around cut-out subjects to catch unwanted dark or pale fringes.
After conversion
- ✓Decided whether transparency is needed
- ✓Chosen a supported format
- ✓Tested on light and dark backgrounds
- ✓Kept the source PNG
Image Converter
Convert JPEG, PNG and WebP while controlling how transparent areas are handled.
Image Converter→This article gives general guidance. If a recipient, printer or official service provides its own requirements, follow those requirements first.
A SMALL NOTE FROM SPACETransparency is not nothing; it is carefully stored information. Choose a format that can carry it through space.