As a member of the Association of Southeast Asian countries (ASEAN), visas aren’t needed for nationals of these countries, with the exception of Myanmar. Malaysians may enter across the Straits of Johor with only an ID card.
On arrival, all visitors are granted permission to stay for 14 days; however, this can be conveniently extended at the Immigration Department for up to three months. Alternatively, you can apply for a ‘social visit pass’ upon entry (issued to nationals who don’t qualify for non-visa entry) for S$20.