You can always delete all saved cookies from Vivaldi menu > Tools > Delete Browsing Data. But that will log you out of your accounts, reset your saved preferences, and more. To delete cookies from a specific domain, head over to Vivaldi Settings. This can be useful when a single website is causing you trouble and you think cookies might be the cause.

To delete a selection of cookies:

1. Go to Settings > Privacy and Security > Cookies > Saved Cookies.
2. Click on Show Saved Cookies.
3. In the search box enter the domain name of the cookies you want to filter out.
4. Below the list of saved cookies, click Delete Filtered Cookies.