JPG vs PNG: which image format should you use?

The short answer

Use JPG for photos, scans, profile pictures, and forms that care about file size. JPG compresses photo detail efficiently, which is why camera images and portal uploads usually end up as JPG or JPEG.

Use PNG for screenshots, logos, UI graphics, images with text, and files that need transparency. PNG is lossless, so sharp edges stay clean, but photo files can become much larger.

File size: why JPG usually wins for photos

A photo contains soft gradients, skin tones, shadows, and thousands of tiny color changes. JPG is designed to compress that kind of image by throwing away detail that most people will not notice at normal viewing size.

PNG keeps pixel information more faithfully. That is useful for graphics, but a PNG version of a photo is often much larger. If a form asks for under 100KB, converting PNG to JPG is usually the first move.

Transparency: where PNG matters

JPG cannot store transparent pixels. If you convert a transparent PNG to JPG, the transparent parts become a solid background, usually white. That is fine for passport-style photos and document scans, but wrong for stickers, logos, product cutouts, and overlay graphics.

If the image needs to sit cleanly over another design, stay with PNG. If the image is a normal photo and the destination accepts JPG, convert to JPG for compatibility and smaller size.

Screenshots, text, and UI images

Screenshots and UI graphics have sharp edges. JPG compression can create fuzz around text, icons, and thin lines. PNG handles those details better, which is why tutorials, app screenshots, and interface examples often look cleaner as PNG.

For a screenshot going into a document or support ticket, PNG is usually the safer choice. For a camera photo going into a job portal, JPG usually makes more sense.

Quick comparison table

When to convert between JPG and PNG

Convert JPG to PNG when a platform specifically asks for PNG or when you want a cleaner editing copy. Just remember that PNG cannot restore detail already lost by JPG compression.

Convert PNG to JPG when the image is a photo, scan, or portal upload and you need a smaller, more accepted file.