I just want to update my index.html file in an S3 bucket. I was going to delete the file and then add the new one just using the website. I can't see any way to do this. Am I thinking wrong? Am I supposed to do all this stuff in code? I just want to hack it together for now so can I do it on the website?
In the console, you can select your file, click "More" and delete is one of the options. There's the upload button to the left as well. I also suggest getting familiar with the AWS CLI so that you also can sync directories and such.
You can go into S3 select a single file and delete it. Afterwards you can upload a new file.
Old console: Select the file in S3 and click Actions and then click delete.
New console: Select the file in S3 and click More and than click delete.
You could use a client like Cyberduck as well.