How to know the compression level of a PNG file and whether it is lossy?

As an IT administrator, it is important to know the compression level of a PNG file and whether it is lossy or not. Knowing this information can help you determine how to best store and manage your image files.

A Portable Network Graphics (PNG) file is a type of image file that uses lossless compression. This means that when the file is compressed, it does not lose any of the original image data. Lossless compression makes it possible to store a large amount of information in a relatively small file size.

The level of compression used in a PNG file depends on the type of data it contains. For example, a PNG file that contains a lot of detail, such as a photograph, will require a higher level of compression than a PNG file that contains a simple graphic.

To determine the compression level of a PNG file, you can use an image editing program such as Adobe Photoshop. In Photoshop, open the PNG file and select \File > Save As.\ This will open the Save As dialog box. In the dialog box, look for the Compression section. This section will show you the compression level of the file.

The compression level is typically expressed as a percentage. The higher the percentage, the more compressed the file is. For example, a PNG file with a compression level of 50% is more compressed than a file with a compression level of 20%.

In addition to the compression level of the file, you can also determine whether the file is lossy or not. Lossy files are those that have been compressed using a method that results in some loss of image data. Lossy files are typically lower quality than lossless files, but they can be smaller in size.

To determine if a PNG file is lossy or not, open the file in an image editing program such as Adobe Photoshop. Then, select \Image > Image Size\ from the menu bar. This will open the Image Size dialog box. In the dialog box, look for the Compression section. This section will indicate whether the file is lossy or not.

Knowing the compression level of a PNG file and whether it is lossy or not can help you determine how to best store and manage your image files. This information can help you make sure that your files are as efficient and high-quality as possible.