One of the most basic ways to cut down on a PNG’s file size is to limit the number of colors that the image has. PNGs can be saved as Grayscale, Truecolor, Indexed-color, Grayscale with alpha, and Truecolor with alpha. Being saved with alpha means that the PNG also has transparency.

How do I reduce the size of a PNG?

One of the most basic ways to cut down on a PNG’s file size is to limit the number of colors that the image has. PNGs can be saved as Grayscale, Truecolor, Indexed-color, Grayscale with alpha, and Truecolor with alpha. Being saved with alpha means that the PNG also has transparency.

Why is PNG file so large?

PNG files are lossless compressed bitmapped images. While they are compressed, they can still attain large file sizes depending on the type of image data saved—they are best suited for images with large areas of solid colours and defined boundaries (such as logos).

Can I compress a PNG file?

You can also compress a PNG file by lowering the image quality. Unlike JPEG files that get terrible picture artifacts with heavy compression, PNG’s use lossless compression, meaning compression doesn’t impact image quality.

Why is my PNG file size so big?

A PNG file saved in Truecolor is going to have a larger file size than one that is saved as Grayscale or Indexed-color. If an image is in black and white or only has a few colors, such as with a logo, it’s a good idea to save it with the lowest color option.

What are the disadvantages of PNG files?

There is one major downside to PNG files, and it is that the file size of this type of image can get large quite quickly. In some cases, just adding a few pixels of additional width to a PNG file can double the file size. When you’re using them on a website or in an app, PNG files that haven’t been optimized can dramatically increase load times.

Why is my PNG image so grainy?

PNG and GIF both use lossless compression, but GIF only works with 8 bits so it requires your image to have 256 colors or less – this often results in a grainier picture. Try the -colorsand -ditheroptions in ImageMagick to reduce the number of bits in your PNG output.

What is a PNG file and how do I use it?

PNG files are lossless compressed bitmapped images. While they are compressed, they can still attain large file sizes depending on the type of image data saved—they are best suited for images with large areas of solid colours and defined boundaries (such as logos).