: The native format for Adobe Illustrator, often used interchangeably with CDR in professional circles. Závazné pokyny autorům
Corel used to offer a free "Viewer," but it is hard to find legally today. Your best bet is the trial version of CorelDRAW (30 days free). cdr format
You can scale a tiny logo in CDR format to the size of a billboard with zero pixelation. : The native format for Adobe Illustrator, often