Try a transparent graphic
Use a PNG with transparent corners, keep JPG selected and choose white as Background for transparent areas. Convert and open the download: those corners should be white, the dimensions should be unchanged without Resize, and the file should have a .jpg extension. If the corners must stay transparent, choose PNG, WebP or AVIF instead.
Transparency: decide what replaces it
JPG has no alpha channel. Any transparent pixels in the PNG have to become a solid colour, and the converter fills them with the background colour you choose — white by default, which suits most documents and web pages. Pick black, a brand colour or a colour matching the page the image will sit on. If you need the transparency to survive, convert to WebP instead.
Choosing a quality
The default of 90 keeps nearly all detail; add Compress to go lower. Savings depend on the image, and lossy compression can change fine edges and textures. For web use, try 75–80 and compare small text, edges and gradients at full size. Lower values can cause banding or halos. Target size under Compress can try a limit such as 200 KB, but some targets need smaller dimensions or a different format.
When you should not convert PNG to JPG
Screenshots with text, diagrams, logos and pixel art look worse as JPG: the lossy encoder blurs sharp edges and introduces colour noise around letters. Keep those as PNG, or try WebP, which handles flat graphics far better than JPG at a similar size.
Images you will keep editing should also stay PNG. Every time a JPG is opened, changed and saved at a lossy quality, a little more detail is lost.
What the converter does
The PNG is decoded, transparent areas are filled, and the pixels are encoded with MozJPEG — the same encoder used by the compressor — which aims to reduce file size. Large images or codec loading failures can use the browser encoder instead; inspect the actual result. Metadata is not carried over. Each result row shows the before and after size; download files one by one or as a ZIP.
Questions about PNG to JPG
- My PNG has a transparent background — what will the JPG show?
- The background colour you pick, white by default.
- Which quality should I use?
- Start at the default 90 and inspect fine detail. Add Compress to try another quality or a size target; neither guarantees invisible changes or an exact byte limit.
- Will text screenshots look OK as JPG?
- Rarely. Keep PNG or use WebP for anything with sharp text or lines.