Adobe Illustrator Artwork (AI)
Adobe Illustrator .AI File Icon.png
Filename extension
Internet media type
Developed byAdobe Systems[2]
Initial release1987; 36 years ago (1987)[3]
Type of formatVector image format
Open format?No[4]

Adobe Illustrator Artwork (AI) is a proprietary file format developed by Adobe Systems for representing single-page vector-based drawings in either the EPS or PDF formats. The .ai filename extension is used by Adobe Illustrator.

The AI file format was originally a native format called PGF. PDF compatibility is achieved by embedding a complete copy of the PGF data within the saved PDF format file. This format is not related to .pgf using the same name Progressive Graphics Format.[5]

The same "dual path" approach as for PGF is used when saving EPS-compatible files in recent versions of Illustrator. Early versions of the AI file format are true EPS files with a restricted, compact syntax, with additional semantics represented by Illustrator-specific DSC comments that conform to DSC's Open Structuring Conventions. These files are identical to their corresponding Illustrator EPS counterparts, but with the EPS procsets (procedure sets) omitted from the file and instead externally referenced using %%Include directives.

Application support


Aside from Adobe Illustrator, the following applications can edit .ai files:


See also


  1. ^ "What is AI? What Opens a AI? File Format List from". Archived from the original on 2018-03-23. Retrieved 2015-04-15.
  2. ^ "SVG Pottery Documentation". Stefano Costa. Retrieved 2015-04-15.
  3. ^ "Adobe Illustrator File Format Specification" (PDF). Adobe Systems Incorporated. Archived from the original (PDF) on 2015-09-06. Retrieved 2015-04-15.
  4. ^ "Graphic File Types Overview". Lawrence San. Retrieved 2015-04-15.
  5. ^ "Optimize native and PDF file sizes". Illustrator Help. Adobe. Retrieved 2014-03-14.
  6. ^ "How To Prepare And Import Illustrator Files Into After Effects For Animation". The Shutterstock Blog. 2015-01-06. Retrieved 2017-07-26.
  7. ^ "Affinity Designer - Complete Feature List". Serif.
  8. ^ "Serif DrawPlus - Opening Adobe Illustrator files". Serif. Retrieved 10 December 2013.
  9. ^ "Inkscape - Current Adobe Illustrator support". Archived from the original on 13 November 2010. Retrieved 2010-12-01.
  10. ^ "Inkscape - What formats can Inkscape import/export?". Archived from the original on 10 November 2010. Retrieved 2010-12-01.
  11. ^ a b "sK1 - UniConvertor - universal vector graphics translator". Archived from the original on 29 November 2010. Retrieved 2010-12-01.
  12. ^ "What can Xara Xtreme for Linux do now?". Retrieved 2010-12-01.
  13. ^ "XnView - supported formats". Archived from the original on 4 December 2010. Retrieved 2010-12-01.
  14. ^ "Convert AI files to JPG, PNG, GIF, PDF and more". Retrieved 2014-06-10.
  15. ^