JPG vs PNG: What Is the Difference?

JPG and PNG often appear side by side in image export menus, but they solve different problems. The practical choice depends less on which format is "better" and more on what kind of image you have, what you need to preserve, and where the file will be used.

JPG, also called JPEG, is usually the right starting point for camera photos and realistic images. PNG is usually better for screenshots, logos, UI graphics, diagrams, and images that need transparency. Converting between them can be useful, but it does not magically add detail that the original file already lost.

How JPG compression behaves

JPG is a lossy format. It reduces file size by discarding visual information that is less noticeable to many viewers. That trade-off is useful for photos because natural images have gradients, texture, and small variations where compression can hide.

The downside is visible around sharp edges, text, flat color blocks, and repeated saves. If you open a JPG, edit it, export it again as JPG, and repeat that process, each save can introduce more compression artifacts. This is why screenshots with text or interface lines often look fuzzy after being saved as JPG.

Use JPG when the image is photographic, transparency is not needed, and broad compatibility matters. Use a modern format such as WebP or AVIF when the goal is smaller web delivery and the target platform supports it.

How PNG compression behaves

PNG is lossless for the image data it stores. If you save a clean graphic as PNG and reopen it later, the pixel values are preserved. That makes PNG reliable for screenshots, interface captures, icons with transparency, diagrams, line art, and source-like assets that may be edited again.

PNG can also store an alpha channel, which is the transparency information used for cutouts, icons, and overlays. JPG does not support transparency, so converting a transparent PNG to JPG normally replaces transparent areas with a flat background color.

The cost is file size. A large photographic PNG can be much bigger than a visually similar JPG because PNG is not designed around the same kind of lossy photo compression.

What happens when you convert JPG to PNG

Converting JPG to PNG preserves the pixels currently present in the JPG, but it does not undo compression artifacts or restore missing detail. If a JPG already has blockiness around text or color banding in a sky, a PNG version can faithfully preserve those flaws.

JPG to PNG still makes sense when you need a lossless working copy before adding annotations, combining with other graphics, or using software that expects PNG. It can also help avoid additional JPG generation loss during later edits.

What happens when you convert PNG to JPG

Converting PNG to JPG is useful when a transparent or lossless file needs to become a smaller, widely compatible photo-style image. It is common for sharing screenshots in systems that do not need transparency, preparing thumbnails, or flattening a design for older tools.

Before converting, check whether the PNG uses transparency. If it does, decide what background color should replace transparent pixels. Also look at whether the image contains text or thin lines; those areas are where JPG artifacts are most likely to be visible.

Practical decision guide

Choose JPG for photos, realistic images, email attachments, and cases where compatibility and smaller file size matter more than perfect pixel preservation.

Choose PNG for screenshots, diagrams, logos, transparency, intermediate editing files, and images that contain text or sharp edges.

Choose WebP or AVIF for web delivery when you want smaller modern files and have control over browser support. A common workflow is to keep an original source file, create optimized WebP or AVIF output for the web, and keep JPG or PNG fallbacks only when needed.

Recipemoon's JPG to PNG and PNG to JPG converters cover the basic format switch. If you are preparing images for a website, compare those results with the JPG to WebP converter before deciding which output belongs in production.