JPG vs PNG vs WebP: Which Image Format Should You Use?

The Short Answer

• Use JPEG for photographs and images with many colors.
• Use PNG for logos, screenshots, and images that need transparency.
• Use WebP when you want the best file size for web images and the destination supports it.

That covers 90 percent of everyday decisions. The rest of this guide explains why and covers the edge cases.

JPEG (JPG)

JPEG has been the standard format for digital photography since the 1990s. It uses lossy compression, which means it discards visual data that is hard to notice, resulting in a much smaller file than an uncompressed original.

JPEG is the right choice when:

• The image is a photograph with many gradual color transitions.
• You need wide compatibility (every app, browser, printer, and phone can open JPEG).
• You want a small file and do not need a transparent background.

Avoid JPEG when:

• The image has text, sharp lines, or flat areas of solid color — JPEG creates blocky artifacts around these.
• You need a transparent background — JPEG does not support transparency.
• You plan to re-edit and re-save the image multiple times — quality degrades with each save.

PNG

PNG uses lossless compression. Opening and saving a PNG file never reduces quality. It also supports full transparency (alpha channel), which makes it essential for logos, icons, and UI graphics.

PNG is the right choice when:

• The image needs a transparent background.
• The image contains text, screenshots, diagrams, or logos with flat colors.
• You are working on a source file that you will edit again.

Avoid PNG when:

• The image is a photograph — PNG files for photos are often 3–5× larger than an equivalent JPEG.
• File size matters and the image does not need transparency.

WebP

Google developed WebP to replace both JPEG and PNG for web use. It supports both lossy and lossless modes, and it supports transparency. A WebP photo at the same perceived quality as a JPEG is typically 25–35 percent smaller.

WebP is the right choice when:

• You are uploading images to a website and want faster load times.
• The platform or CMS accepts WebP (all major browsers have supported it since 2021).
• You want one format that handles both photos and transparent graphics.

Avoid WebP when:

• You are sending images by email to people who may open them on older software.
• The destination platform specifically requires JPEG or PNG.

Other Formats Worth Knowing

GIF: 256-color limit, used for simple animations. Mostly replaced by WebP or video for new projects, but still widely supported.

BMP: Uncompressed bitmap format, very large files. Used in some Windows workflows and print pipelines.

TIFF: High-quality format used in professional photography, scanning, and print production. Large files, not for web use.

ICO: Used for browser favicons and Windows application icons. Contains multiple resolutions in one file.

SVG: Vector format for logos, illustrations, and icons. Scales to any size without quality loss because it is based on math rather than pixels.

Quick Decision Guide

Converting Between Formats

You can convert any image to a different format without needing desktop software. Upload the file, choose the output format, and download the result. Just remember: converting a JPEG to PNG does not recover quality that was already lost during the original JPEG compression. The PNG will be lossless, but it will be a lossless copy of an already-compressed image.

For best results, always convert from the highest-quality original you have.