Anyone needing a visa for Slovakia as of 2014 (even those qualified for the Visa On Arrival) can submit an online application. Here is how it works:
Apply for a Slovakia eVisa right now. You must register and finish the online application form.
Upload electronic versions of the necessary paperwork. (The necessary paperwork for a Slovakian visa is listed below.)
Pay the visa cost for Slovakia. You must use a debit or credit card to make an online purchase, such as a Visa, American Express, MasterCard, Discover, Maestro UK, Visa Electron,
Maestro International. A receipt will be sent to your email, which you must print and provide to the Slovakian immigration officials when you enter the country.
At one of Slovakia's foreign consulates or embassies, you may also apply for a visa. You must get in touch with the Slovakian embassy or consulate in your nation to find out about business hours, days off, and any particular specifications they may have for submitting visa applications.
You may be able to apply online, or you may need to submit a paper application. You can always apply online if there is no Slovakian presence in your nation.