PNG to JPG converter - make images much lighter

PNG is lossless, so photos and screenshots with lots of colours take up a lot of space. JPG discards detail the eye cannot see, so a photo saved as JPG usually weighs several times less than the same image as PNG. The size before and after conversion is shown next to each file.

Simple graphics with a few flat colours, such as diagrams on white, are the exception. They are often smaller and sharper as PNG, so they are not worth converting.

JPG has no alpha channel. Transparent PNG pixels need some colour, otherwise many programs would show a black background. In this converter you choose the background colour (white by default). Semi-transparent edges are blended smoothly into the background, so a logo on white looks natural.

If the logo is going on a page with a dark background, set exactly that colour (e.g. #1e1e1e) instead of white to avoid a light halo around the edges.

• 85% (default): photos and screenshots containing photos; a good balance between size and quality.
• 90-95%: screenshots with small text, tables and code; lower quality creates fuzzy “mosquito noise” around letters.
• 70-80%: when the file has to fit an attachment or upload limit.

Common mistakes: converting simple flat-colour graphics (the JPG comes out bigger, and the tool shows a warning next to the file), keeping a working file as JPG and editing it again and again (every save adds loss), and converting a transparent logo without picking a matching background. If transparency must stay but the file should be lighter, use PNG to WebP.

The pixel dimensions of the image do not change.

Conversion runs entirely in your browser (Canvas API). Files are never sent to a server, so you can safely convert private photos, scans and company graphics. Saving to a new format also strips EXIF metadata, including GPS coordinates.