The Immigration Department requires tourists to have a passport valid for at least 6 months. Likewise, for some countries, it is necessary to have a tourist visa issued by an embassy of El Salvador.
Another document that they must present is the tourism card, which is available for $12 and can be purchased at the point of entry into the country. It normally extends for 90 days. Requirements vary depending on the nationality of the visitor.
For visitors to South America, proof of yellow fever vaccination is required.
EN 
ES 