Abstract
Association of Southeast Asian Nations (ASEAN) has begun a collaboration to advance their economic growth and development in the ASEAN capital market. The Stock Exchange of Thailand, Bursa Malaysia and Singapore Exchange are already connected in 2012. This research is designed to investigate web information services of information disclosures for listed companies' financial data in stock exchanges of Thailand, Malaysia and Singapore. The degree of XBRL adoption has a positive impact to information disclosures by stock exchanges. XBRL is an electronic format for business reporting based on XML.