We use an excellent free program, WS FTP by John Junod. Also, the Arachnophilia Web-page editor will automatically upload pages to the Web, sending only those you have changed. AOLpress can also be configured to use the FTP protocol for uploading pages. Many other Web-page editors can upload pages, as well, but some may require special arrangements with your Web host. Test your pages in different browsers, and with different settings, to see how your pages display.
Screen size makes a big difference, too.
These issues are discussed in detail in the Test Drive section of our Making Pages page, and in the Browsers section our of our Webware page. Two different situations can cause images on a Web page not to load, so that they can't be displayed at all. This can also happen if you give your image a name that works on your computer, but won't work on the computer acting as your Web server. Some UNIX servers, for example, won't accept filenames with capital letters or spaces in them. The other situation is more difficult to diagnose.