A site that rejects WebP, a photo too big as PNG, a logo that needs a transparent background: each needs a different format, and the choice has consequences.
What each format is good for
- JPEG suits photographs: small files, no transparency.
- PNG suits graphics, screenshots and anything needing sharp edges or transparency, but is large for photos.
- WebP is a modern format that is usually smaller than both and supports transparency, with broad but not universal support in older software.
The comparison page sets them side by side.
Using the converter
- Choose an image, up to 25 MB.
- Pick the target: PNG, JPEG or WebP.
- Download the converted file.
Dimensions stay the same. Converted JPEG and WebP files use a quality of 92%, and PNG is saved without loss.
Transparency
JPEG has no transparency. When you convert a transparent PNG to JPEG, the tool fills the background with white, as image editors usually do. If you wanted another colour or to keep transparency, convert to PNG or WebP instead.
What conversion cannot do
- Converting a JPEG to PNG does not bring back detail already lost; the PNG will simply be a larger copy.
- Converting repeatedly between lossy formats degrades quality each time.
- Animated GIFs are not preserved; only a still frame is converted.
Frequently asked questions
Is the conversion done on my device?
Yes. The image is redrawn in your browser and nothing is uploaded.
Will the quality drop?
Going to JPEG or WebP re-encodes lossy at 92%, with a small, usually invisible change. Going to PNG does not lose quality.