Why convert PNG to JPG?
Photos saved as PNG are large, because PNG is lossless. Converting to JPG usually makes them a fraction of the size with no difference you'd notice at normal viewing size. JPG is also the format most upload forms, email clients and older apps expect.
For logos, screenshots and diagrams, think twice. JPG can add faint smudges around sharp edges and text. Keep those as PNG, or use a high quality setting when you need a JPG.
What happens to transparency?
JPG doesn't support transparency. When a PNG has a transparent background, the transparent areas are filled with white during conversion, and semi-transparent edges are blended onto white. This suits documents and white web pages. If you need to keep the transparency, convert to WebP instead.
Choosing the JPG quality
The quality slider starts at 90 percent, which keeps photos and most graphics clean. For photos you are sharing online, 75 to 85 percent gives a smaller file that still looks the same. For screenshots with small text, stay at 90 percent or above. Drag the compare slider across text and edges to check.
If you need the JPG under a specific size, convert here and then use the Compress Image to N KB tools, or use the Image Compressor with JPG output and a target size in one step.
How to convert PNG to JPG
Upload the PNG and the JPG appears in the preview within a moment, along with the new file size and the percentage saved. Adjust the quality slider for a smaller or cleaner result, then download. The width and height stay the same. For a folder of PNGs, the Bulk Image Compressor converts up to 20 files to JPG at once.