Back to blog Sep 28, 2026

JPG vs PNG vs WebP: which image format should you use?

Understand the differences between common image formats and choose one for your task.

JPG, PNG, or WebP: the quick answer

Choose JPG for photographs when you need a familiar format and do not need transparency. Choose PNG for lossless screenshots, diagrams, and graphics with sharp edges. Choose WebP when your destination accepts it and you want to compare a modern compressed alternative, including images with transparency.

There is no single format that always produces the smallest acceptable file. The image itself, the export settings, and the place where you will use it all matter. Start with the original file and compare the result at its intended display size.

When to use JPG

JPG and JPEG refer to the same image format. It works well for photographs with many colors and gradual changes in tone. Its lossy compression discards information to reduce file size. Lower quality settings may produce visible blocks or soft edges, especially around text.

Use JPG for a photograph in a document, an email attachment, or an upload form that requires JPEG. It does not preserve a transparent background. If your source contains transparency, check the background color in the exported result before sharing it.

Avoid repeatedly editing and saving the same JPG. Each lossy export can discard more detail. Keep an original and create each new version from that source.

When to use PNG

PNG uses lossless compression and supports transparency. It is a useful choice for interface screenshots, simple diagrams, and graphics where crisp text or precise edges matter. Lossless means the compression preserves pixel information; it does not mean the file will be small.

A large photograph saved as PNG can be much heavier than a visually acceptable JPG. Converting an already compressed JPG into PNG will not restore missing detail. It changes how the remaining pixels are stored.

When to use WebP

WebP supports lossy and lossless compression as well as transparency. It is worth testing for web graphics and photographs when the application or website receiving the file accepts it. A particular upload form or editing workflow may still require JPG or PNG.

Compare the exported WebP with your source rather than assuming the format name guarantees a smaller or better image. Inspect text, hair, gradients, and transparent edges, then compare file sizes at similar visual quality.

A practical format-selection workflow

Check the destination first: accepted formats, maximum file size, and required dimensions.
Keep an untouched original. Resize a copy if the image has more pixels than the destination needs.
Try JPG for photos, PNG for lossless graphics, or WebP if the destination supports it. Preserve transparency when it is needed.
Inspect the result at its display size and zoom in on important details. Check the background and colors.
Compare the final file size and test the actual upload. Use the image converter below when you need another format.

Changing format is only one part of reducing file size

A 4000-pixel-wide image can remain unnecessarily large even after conversion. If it will only be displayed at a smaller size, resizing may save more data than switching formats alone. Compression is a separate decision about how much information is stored.

Read the resizing and compression guide below to decide which operation your file needs. Convert when the format is wrong; resize when the dimensions are wrong; compress when the dimensions are right but the file is still too heavy.