File Formats Wiki
Adobe Illustrator ( .Ai )
The preferred vector art file among the design community. Adobe Illustrator Document (.ai) Native vector file format for Adobe Illustrator. It supports all the features of the program. However, earlier versions also use the .ai file extension and do not support all the features of IllustratorCS.
Adobe Portable Document Format ( .PDF)
File format used to present and exchange documents reliably, independent of software, hardware, or operating system. Invented by Adobe, PDF is now an open standard maintained by the International Organization for Standardization (ISO). PDFs can contain links and buttons, form fields, audio, video, and business logic. They can also be signed electronically and are easily viewed using free Acrobat Reader DC software.
Adobe Encapsulated Postscript File ( .EPS)
DSC-conforming PostScript document with additional restrictions which is intended to be usable as a graphics file format. In other words, EPS files are more-or-less self-contained, reasonably predictable PostScript documents that describe an image or drawing and can be placed within another PostScript document. Simply, an EPS file is a PostScript program, saved as a single file that includes a low-resolution preview "encapsulated" inside of it, allowing some programs to display a preview on the screen.
Adobe Photoshop Document ( .PSD)
PSD file is a layered image file used in Adobe PhotoShop, which stands for Photoshop Document, is the default format that Photoshop uses for saving data.PSD is a proprietary file that allows the user to work with the images' individual layers even after the file has been saved.
Windows Metafile (.WMF)
Image file format originally designed for Microsoft Windows in the 1990s. Windows Metafiles are intended to be portable between applications and may contain both vector graphics and bitmap components. It acts in a similar manner to SVG files.
Windows Enhanced Metafile (.EMF)
Newer version with additional commands. EMF is also used as a graphics language for printer drivers. Microsoft recommends that "Windows-format" (WMF) functions only "rarely" be used and "enhanced-format" (EMF) functions be used instead.
Scalabale Vector Graphics (.SVG)
XML-based vector image format for two-dimensional graphics with support for interactivity and animation. The SVG specification is an open standard developed by the World Wide Web Consortium (W3C) since 1999. SVG images and their behaviors are defined in XML text files.
Portable Network Graphics (.PNG)
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.