What it is
An AI file is Adobe Illustrator's native vector format. It stores editable vector paths, typography, and layered design data.
Why it matters
AI is widely used by designers for source files because it preserves editability and advanced Illustrator features.
Common use cases
- Master design source files
- Brand identity and logo systems
- Editable illustration archives
Quick comparison
AI is best for editing inside Illustrator; EPS and SVG are often used for broader compatibility.