Convert PNG files to smaller JPG images, ready for email and uploads.
Most people arrive here because a form refused their file. Job portals, visa applications, exam registrations and bank forms routinely cap uploads at 200KB, 500KB or 1MB, and a screenshot saved as PNG blows past that immediately. A full-screen screenshot on a modern display can easily reach 3MB as a PNG and drop under 300KB as a JPG with no visible difference.
Email is the other common trigger. Twenty PNG photos will not fit in a 25MB attachment limit; the same twenty as JPGs usually will, with room to spare.
Two things. Transparency disappears, because JPG has no way to record it — transparent pixels are filled with white during conversion. If your PNG is a logo meant to sit on a coloured background, converting it to JPG will give you a white rectangle around it, and you should keep the PNG.
The second is a small, usually invisible amount of detail. JPG compression works by discarding information the human eye is poor at noticing. At 85% quality the result is indistinguishable from the original for most images. Push it down to 50% and you will start to see smudging around sharp edges and text.
Two controls do the work. The quality slider changes how aggressively the image is compressed; 85% is a good default, 70% is still fine for most purposes, and below 50% the damage becomes visible. The maximum width setting shrinks the image's actual dimensions, which is often the bigger win — a photo does not need to be 6000 pixels wide to be attached to an email, and capping it at 1920px can cut the size by 80% before compression even starts.
The converted size appears next to each file, so you can adjust and reconvert until you are comfortably under the limit. Work with the width first, then the quality: reducing dimensions costs you less visible quality than heavy compression does.
JPG files are usually far smaller, which helps when a form limits upload size or you are emailing lots of photos.
JPG cannot store transparency, so transparent areas become white. If you need the transparency, keep the PNG.
Yes. Lower the quality slider, or set a maximum width to shrink the dimensions too.