PNG compresses losslessly with DEFLATE — perfect for screenshots and line art, but needlessly heavy for photographs, where a five-megabyte PNG is routine. JPEG's DCT compression was designed for exactly those photographic gradients, routinely producing files five to ten times smaller at visually identical quality. This tool re-encodes your PNG as a JPEG in your browser, flattening any transparency onto white, and never sends the file anywhere.
Drop your file here or click to browse
.png — up to 200 MB. Processed locally; never uploaded.
Photographic PNGs typically shrink 5–10× at 85% JPEG quality, because DEFLATE can't exploit photographic redundancy the way DCT-based JPEG does. Screenshots with flat colors shrink less, sometimes only 2×.
JPEG doesn't support an alpha channel, so transparent regions are filled with white. If the transparency matters, keep the PNG or convert to WebP instead — both preserve alpha.
Usually no. JPEG's compression blurs sharp edges, so text in screenshots gets fuzzy halos. Keep screenshots as PNG; convert photos instead — that's the trade each format was built for.
Never. The conversion runs in a Web Worker in your own browser. You can watch the network tab in developer tools — nothing is transmitted.