CONVERT
PNG → JPG

Yes, JPG uses lossy compression which typically reduces file size by 60-80% compared to PNG, making it ideal for photos and web images where some compression is acceptable.

Yes — JPG is a lossy format, so some information is always discarded. At the default 85 % setting the loss is invisible on photographs but can create halos on text and logos. For graphical content with hard edges, staying on PNG is usually a better call than accepting the JPG artefacts.

Yes — JPG has no alpha channel. Transparent PNG pixels become opaque white in the JPG. If transparency matters, convert to WebP instead, which supports alpha and beats PNG on file size too.

JPG does not support transparency. Any transparent areas in your PNG will be filled with a white background in the resulting JPG file.

JPG has no alpha channel, so transparent pixels must be flattened onto a solid colour. KaijuConverter fills them with white by default; you can pick any hex colour in Advanced. If you rely on the transparency — for overlaying on a coloured page — convert to WebP or AVIF instead, both of which keep alpha and compress photos as well as JPG.

q=90 by default — visually indistinguishable from lossless on photographic content. Advanced exposes the full q=1 to q=100 range; q=80 is a common sweet-spot for web.

Yes, KaijuConverter allows you to set the JPEG quality from 1 to 100. Higher values preserve more detail but produce larger files. We recommend 85 for a good balance of quality and size.

On photos the JPG is typically 5 to 10 times smaller than the PNG. A 10 MB iPhone screenshot of a photo often becomes 900 KB–1.2 MB. On screenshots with large solid areas or text the saving is more modest, usually 2-3x, and the JPG may introduce visible artefacts.

No, usually. JPG compresses text and sharp edges poorly, introducing visible ringing. For UI screenshots keep PNG, which handles flat colour efficiently and losslessly.

Yes. Upload multiple files in a single session on the free tier; each is processed independently so one corrupted file does not stop the rest. For large batches (50+ files) the Pro plan removes throttling, and the REST API lets you automate the process from a script or cron.

PNG and JPG use different metadata containers, but the common fields (EXIF, XMP, IPTC) are mapped across. Camera settings, timestamps and GPS tags survive. tEXt chunks unique to PNG that have no JPG equivalent are dropped, and colour-profile (ICC) data is preserved unless you strip it explicitly.

Technically yes — you can convert back to PNG afterwards — but the JPG compression that happened on the way out cannot be reversed. The resulting PNG will be lossless from that point forward but will still carry whatever JPG artefacts existed. For a clean round-trip, keep the original PNG as your master.