Short answer, almost no country allows working unless you have a work permit. People working remotely are usually on a tourist visa or maybe a retirement or mar

Short answer, almost no country allows working unless you have a work permit. People working remotely are usually on a tourist visa or maybe a retirement or marriage visa. Available visas and enforcement vary by country. Sitting in a hotel room or apartment or coffee shop working is not likely to attract attention from immigration authorities, the laws are to prevent foreigners taking jobs from locals. Keep your business to yourself and don't blab to everyone that you are doing online work, no one will know. I've heard from a few people who have had their papers and laptop examined at immigration for evidence that they are working but this seems to be rare. The reports I heard were Canada, UK, and Thailand. The more computer stuff you cart around the more suspicious it might look. Everyone travels with a laptop these days. Keep your work stuff in the cloud, look like another tourist posting to Facebook, you'll be fine.