.ai — Adobe Illustrator Artwork
Image application/postscript
What a .ai file is
Illustrator's vector working format. Modern .ai files are actually PDFs with extra Illustrator data.
How to open it
Illustrator, or Inkscape and Affinity Designer with some loss of fidelity. Renaming to .pdf often opens it for viewing.
Worth knowing
For handing artwork to a developer, export SVG rather than sending the .ai.
Other image formats
- .heic — High Efficiency Image Container
- .webp — WebP Image
- .avif — AV1 Image File Format
- .svg — Scalable Vector Graphics
- .psd — Photoshop Document
- .raw — Camera Raw Image