PNG vs JPG vs WebP: Differences and When to Use Each Format

Choosing the right image format is one of the most important decisions when working with visual content for the web. PNG, JPG, and WebP have unique characteristics that make them ideal for different scenarios. Using the wrong format can mean unnecessarily large files, loss of transparency, or quality degradation. In this comparison guide we analyze each format in depth so that you can make the best decision in each situation, and we show you how to convert between them using our online image converter.

Characteristics of each format

Format	Compression type	Transparency	Animation	Relative weight
JPEG/JPG	With loss	No	No	Low
PNG	No loss	Yes (alpha channel)	APNG	High
WebP	Both	Yes	Yes	Very low

As seen in the table, WebP combines the best of both worlds: it supports transparency like PNG, offers lossy compression like JPG, and also allows animations. However, its adoption is not yet universal in all contexts, which means that knowing the three formats remains essential for any digital professional.

JPEG: the king of photographs

JPEG (Joint Photographic Experts Group) was created in 1992 and remains the most used format for photographs on the Internet. Its lossy compression algorithm is designed specifically for images with millions of colors and smooth transitions, such as landscapes, portraits, and product photos. A quality 80 JPEG file typically weighs 60% to 80% less than the original image without the difference being noticeable to the naked eye.

The main advantages of JPEG are its universal compatibility – it works on absolutely any device and browser – and its excellent quality-to-weight ratio for photographic content. Its limitations are the lack of transparency and cumulative degradation: every time you edit and save a JPEG, it loses a little more quality. That is why it is advisable to always work from the original file and export to JPEG only as a final step.

PNG: sharpness and transparency

PNG (Portable Network Graphics) uses lossless compression, meaning the image retains every pixel as it was created. It is the preferred format for logos, icons, screenshots, infographics, and any graphics that require sharp edges or transparent backgrounds. PNG's alpha channel allows for levels of partial transparency, an essential feature for modern web design where elements are overlaid on different backgrounds.

The main drawback of PNG is its weight. A photo saved as a PNG can weigh 3 to 10 times more than its JPEG equivalent. That's why you should never use PNG for photos intended for the web. If you need to compress a PNG, you can use tools like GlobalTool image compression which reduces the number of colors in the palette without altering the visual appearance of the graph.

WebP: the format of the future (and the present)

Developed by Google in 2010, WebP offers lossy compression that is 25-35% more efficient than JPEG and lossless compression that is 26% more efficient than PNG, according to data published by Google. In addition, it supports transparency and animations in a single format. By 2026, WebP is supported in all major browsers—Chrome, Firefox, Safari, Edge, and Opera—removing the major barrier that limited adoption in previous years.

If you're creating new content for the web, WebP should be your first choice in most cases. You can easily convert your existing images using the image file converter which supports direct conversion to WebP. For contexts where you need full support—such as HTML emails or platforms that don't yet support WebP—JPEG and PNG are still the safe options.

Also check out our guide on how to compress images without losing quality to further optimize your WebP files after conversion. And if you need to adjust the dimensions for different platforms, check out the article on image sizes for social networks in 2026.

Quick guide: which format to choose?

• Photo for website or blog: WebP (with JPG fallback).
• Logo or icon: PNG or SVG.
• Screenshot: PNG.
• Image for email marketing: JPEG.
• Banner with transparency: WebP or PNG.
• Animated image: WebP or GIF.
• High quality printing: TIFF or PNG (no web compression).

Remember that you can extract the dominant colors of any image with our color palette tool to ensure your graphics maintain visual consistency after conversion. Mastering image formats will allow you to create faster websites, more professional designs, and a better experience for your users.