1. Austria
2. Iceland
3. Belgium
4. Portugal
5. Bosnia and Herzegovina
6. Brazil
7. Qatar
8. Andorra
9. Liechtenstein
10. Monaco
11. Croatia
12. Estonia
13. Fiji
14. Georgia
15. Latvia
16. Lithiuania
17. Malta
18. Macedonia
19. Micronesia
20. Mexico
21. Moldova
22. Montenegro
23. Nauru
24. Palau
25. Papua New Guinea
26. Marshall Islands
27. Salomon Islands
28. San Marino
29. Cyprus
30. Switzerland
31, China (applicable to Hong Kong and Macau passport holders)
32. Vanuatu
33. Western Samoa
34. Serbia
35. Slovenia.
List of 40 first countries whose citizens are allowed to apply for visas online, effective in February, 2017:
1. Azerbaijan
2. Argentina
3. Armenia
4. Ireland
5. Poland
6. Belarus
7. Bulgaria
8. Brunei
9. South Korea
10. Germany
11. Chile
12. Colombia
13. Czech Republic
14. Cuba
15. Denmark
16. Timor Leste
17. United States of America
18. Hungary
19. Greece
20. Italy
21. Kazakhstan
22. Russia
23. United Kingdom
24. Luxembourg
25. Myanmar
26. Mongolia
27. Japan
28. Panama
29. Peru
30. Finland
31. France
32. The Philippines
33. Romania
34. Spain
35. Sweden
36. China (not applicable to Chinese e-passport holders)
37. Uruguay
38. Venezuela
39. Norway
40. Slovakia
From December 2, 2017, Vietnam has added the following six countries to the list:
1. Australia
2. Canada
3. India
4. The Netherlands
5. New Zealand
6. The U.A.E.