PNG to
JPG

Yes. JPG uses lossy compression. The amount of quality loss depends on the quality setting. At quality 80–90, differences are usually imperceptible for photographs. For diagrams or text images, quality loss is more visible.

Yes. JPEG does not support transparency. Transparent areas in the PNG are filled with white (or a colour you specify) during conversion.

Use JPG for photographs and images with many colours and gradients where lossless quality is not critical. Use PNG for logos, screenshots, diagrams, and images with text or sharp edges where clarity is important.

Photographs typically shrink 60–80% compared to PNG. Images with large flat colour areas see less reduction.

No. Conversion happens entirely in your browser using the Canvas API. Your images are never transmitted anywhere.