PNG compressor & decompress or from the Open Source community. Reduce the size of PNG images online Optimize and compress PNG images online to save time, memory and your hard disk space. Save more for you! Reduce the Size of PNGs. Online PNG compressors. Weights and measures of PNG Images The image file format PNG is a compression format originally used as a vector graphic format. It is often used for images of text, logos, icons, maps, and other illustrations. It is also widely used as an image format for games, 3D graphics, and other graphics, such as animation and games. Furthermore, it has several variations of the PNG file. These include the original PNG file format, version 0.8, the version 1.0, version 2.0, and version 3.2. The file size (1 KB for each bitmap) can vary from less than 1 KB for a very small picture to more than 50 KB for large pictures. To compress the image with PNG, you may compress the image itself using the following methods: TIFF compression The TIFF compression (the only compressed file, the original PNG is an uncompressed file) was created by Steve Bell in 1991. It has a unique property, TIFF can be displayed by the same software as the TIFF format used by it. The TIFF compression used by Apple's QuickTime and Photoshop. The DCT (delta-tensing) method DCT stands for delta-theta-conversion. As its name suggests, delta-tensing is a method of reducing noise which can significantly reduce the file size of a PNG image. There are several methods to convert between different formats for your file. However, not all applications have the ability to handle the different versions of the PNG file; in turn, this often makes them very buggy and slow. This article gives an overview of the different PNG compression methods for online compression: TIFF: delta-theta-conversion, compression and compression by weight The TIFF compression was first created by Steve Bell in 1991. The key principle of this format is delta-tensing — a method of reducing noise — which should result in a significant reduction in the file size of a TIFF image.