When PNG to JPG makes sense
JPG is the right target for anything that looks like a photograph: camera pictures, product shots exported as PNG, scanned prints or images from an AI generator. These usually shrink a lot.
Keep PNG for logos, diagrams, charts and screenshots full of small text. JPG compression can leave faint speckles around letters and thin lines.
Not sure? Convert one file at 92%, zoom in on the edges and text, and compare the two file sizes.
Photos saved as PNG are heavy because PNG stores every pixel exactly, including sensor noise and fine texture. JPG drops tiny differences your eyes barely notice, and that is where the savings come from.
What happens to transparency?
JPG has no transparent pixels, so FileKiwi fills those areas with white. That suits documents, forms and most web pages.
A white fill works well for signatures, ID style photos and product images that will sit on a white store page. It looks wrong on a logo meant for a dark banner, where a white box would show around it.
To place the subject on another color, use Remove Background, which can add any solid color. To keep the transparency, stay with PNG and make it lighter with Compress PNG.
Hitting a file size limit
Many upload portals cap image size, and some work mailboxes refuse attachments above a few MB. Converting to JPG often solves that by itself. If the file is still too big:
- Move the quality slider down a step and convert again.
- Reduce the pixel size with Resize Image. A 4000 pixel wide photo is rarely needed for a form.
- For an exact target, use a preset such as compress image to 100 KB.