PNG and JPG solve different problems. PNG is lossless and supports transparency — perfect for screenshots, logos, and graphics. The cost is size: PNG photos are routinely five to ten times larger than an equivalent JPG. When a form rejects your file for being too big, an email bounces with a heavy attachment, or a website crawls under full-size PNGs, converting to JPG is almost always the answer.
Drop your PNGs above and download compact JPGs. The default 90% quality setting is deliberately conservative — files shrink dramatically while staying visually identical for photos and ordinary images. If you want smaller still, open the options and slide the quality down; the before/after file sizes are shown honestly for every file so you can judge the trade yourself.
One thing to know about transparency: JPG doesn't support it. If your PNG has a transparent background, it will be composited onto white (you can pick a different background colour in the options). If you need the transparency kept, you want to stay in PNG or convert to WebP instead — and if you drop a file where that seems likely, this page will say so rather than silently flattening your image.
Everything happens on your device. No uploads, no server, no queue — the conversion runs in your browser, which makes it effectively instant for typical files and completely private for all of them. Screenshots of private conversations, design work under NDA, photos of your kids: none of it goes anywhere.
Built for batches. Drop a folder's worth at once; each file shows its own progress and result size, and one click downloads the lot as a ZIP. There's no signup, no watermark, and no artificial limit on file count or size — the only limits are your device's own.
When JPG is the wrong direction — you need transparency back, or you're preparing images for the web and want the smallest possible files — the sibling tools below convert the other way, or to WebP.