JPEG
JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.
PNG
Portable Network Graphics (PNG), is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Internet.
PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel), and full-color non-palette-based RGB images (with or without alpha channel). PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK.
PNG allows you to put images to any background.
The same PNG photo can be up to 10 size lager than JPG photo.
PSD
Photoshop files have the default file extension PSD, which stands for "Photoshop Document."
Because of Photoshop's popularity, PSD files are widely used and supported to some extent by most competing software. Photoshop's primary strength is as a pixel-based image editor, unlike vector-based image editors. Photoshop also enables vector graphics editing through its Paths, Pen tools, Shape tools, Shape Layers, Type tools, Import command, and Smart Object functions. These tools and commands are a convenient way to combine pixel-based and vector-based images in one Photoshop document, because it may not be necessary to use more than one program.
### JPEG JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. !billionphotos-1849397-small500.jpg! ### PNG **Portable Network Graphics** (PNG), is a raster graphics file format that supports lossless data compression. **PNG** was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Internet. PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel), and full-color non-palette-based RGB images (with or without alpha channel). PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK. PNG allows you to put images to any background. The same PNG photo can be up to 10 size lager than JPG photo. !PNG.png! ### PSD Photoshop files have the default file extension **PSD**, which stands for "Photoshop Document." Because of Photoshop's popularity, PSD files are widely used and supported to some extent by most competing software. Photoshop's primary strength is as a pixel-based image editor, unlike vector-based image editors. **Photoshop also enables vector graphics** editing through its Paths, Pen tools, Shape tools, Shape Layers, Type tools, Import command, and Smart Object functions. These tools and commands are a convenient way to combine pixel-based and vector-based images in one Photoshop document, because it may **not** be necessary to use more than one program. !psd.png!