Is there a Croatia vignette?
No. Croatia does not sell a motorway vignette. Croatia has no vignette either. Its motorways charge by distance at barriers, and since 2023 the country uses the euro, so no currency change is needed at the toll booth.
The vignettes are needed before you arrive. Every common route from central Europe crosses Slovenia or Hungary, and Slovenia sells nothing shorter than seven days even for an afternoon of transit.
Driving to Croatia: what you do need
Each of these crossings passes through countries that do charge by vignette. The route pages list the exact products and current prices.