Lossy images are compressed for the sake of space, resulting in some loss of fidelity. What’s lossy? You’ll notice the other file types are lossless, which means they don’t degrade the image quality. This lossy format is good for compressing photographs and images with many colors. JPG/JPEG -Joint Photographic Experts Group
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Rectangular logos and icons that I don’t expect to print are usually good as PNG8. To reduce the file size, reduce the number of colors in the palette to the minimum acceptable level. The format is good for artwork that contains few colors and no gradients.
BEST IMAGE FORMAT FOR WEB PAGE BACKGROUND PORTABLE
PNG8 – Portable Network GraphicsĪt 8 bits per pixel, this lossless format can represent up to 256 colors, including transparency but not translucency. Rounded corners and edges that are not justified need PNG32 to blend into the background. The downside to PNG32 is size, which tends to be larger than PNG8 and JPG. When you save an image in Photoshop as PNG24 and it contains translucency (aka “alpha transparency”), it will actually use the PNG32 format. PNGs can support a nice transition between the image edges and the background and it can represent 16 million colors. Translucency means light can shine through an image and even distort it. This lossless format supports translucency, not just transparency. Please don’t put these animations on your website. To shrink the file size, reduce the number of colors in the palette to the minimum acceptable level. For regular use, they have been superseded by PNG8 today, but the format’s second life as a social medium has been unrivaled. GIFs originally gained popularity because they have a lossless format that works on a palette of up to 256 colors and supports transparency. You’re probably familiar with GIFs because they have taken over your social media feed. It’s much more efficient for me to say, “red circle” than to transmit all of the pixels in an image of a red circle. Pixels lose fidelity when enlarged because the number of pixels in an image is fixed.
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A vector format defines the image in terms of lines and shapes, not pixels, so these files can resize well and are ideal for printing and enlarging. The chart below can give you a better idea of what to choose, and after that, we’ll get into greater detail on each file type.īesides using the canvas element in HTML5, this is your only option for vector-based images. While there are a number of image file types of varying levels of browser support, I’ll focus on the most important for everyday use: JPG, PNG8, PNG32, GIF, and SVG. The good news: Selecting the right format for the image will make your site not just look better, but also load faster and provide a stronger user experience. Whether you’re a seasoned web content manager or a newbie blogger, you’ll likely find yourself asking this question: what is the best image file format to use for my web page? JPGs are everywhere, but what is a PNG? What’s up with GIFs (however you pronounce it)? Rest easy, there’s an answer.