Conversion & calculation
PNG to JPG Converter
Convert a transparent PNG to a white-background JPG for a document or upload that requires JPEG.
Up to 20 MB per file · Up to 20 megapixels
Images are processed in your browser. Reducing the width preserves the aspect ratio.
JPG replaces transparency with white. GIF is converted to a still image of its first frame.
How to use
- Choose an image in the required source format. The output format is preselected.
- Optionally reduce the maximum width and adjust quality, then convert and download the result.
Formula and conversion method
JPG pixel = original color × alpha + white × (1 − alpha)
Worked example
800×600 PNG → maximum width 400 px → 400×300 JPG
Things to know
Transparent pixels are composited onto white. JPG is lossy; keep the PNG original for sharp text and logos.