ESTA is an automated system that determines the eligibility of visitors to travel to the U.S. under the Visa Waiver Program. The ESTA application collects the same information collected on Form I-94W. ESTA applications may be submitted at anytime prior to travel, though it is recommended travelers apply when they begin preparing travel plans.ESTA questions answered here - ESTA Q & As
Apply Here International visitors to the U.S. from Visa Waiver Program countries are now required to apply for travel authorization online.
ESTA Fact Sheets Now available in 10 additional languages: Chinese, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Spanish and Swedish.