Hi washingtondc. Welcome to digicamhelp.

If you take photos in the "JPG" format (which most all digital cameras do by default), then there is really no conversion needed at all before uploading. The only thing that some photo web sites may require is a resize. Some sites do not allow large image files, so you would have to reduce your photo image sizes before uploading.
Unless you take them at a small, low quality format, then you would automatically have small image file sizes that may work at most sites. Some sites will not care about size ... but the larger your files, the longer uploading and viewing will take.
But as far as format and uploading, you would need no special software at all. All you need is Windows Explorer (or similar) to copy files from card to computer.
I hope that helps.
